The Human Diagnostic

Dave Hartzell's Heat & Air - Kingfisher,OK
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Looking for honest stories about people, not product reviews? You're in the right place.The Human Diagnostic isn't a how-to HVAC podcast. It's what a 45-year Master Technician notices about people after 90,000 service calls across gas plants, oil rigs, hospital preservation systems, high-rises, feedlots, walk-in freezers, and residential homes all over Central Oklahoma.Hosted by Dave Hartzell, each episode tells a real story from a real service call. Sometimes he's driving to the job and predicting what he's about to walk into. Sometimes he just left and he's still working through what he saw. Either way, the story turns out to be about more than HVAC.Topics you'll hear across the season:✅ The customer nobody wanted to take, and what changed when someone finally did✅ Why the person researching their broken AC at midnight isn't being difficult, they're scared✅ What 45 years of walk-ins, weddings, funerals, and broken water heaters teaches you about anxiety✅ The tech who can fix anything but can't explain it, and why the customer doesn't trust him✅ The review you can't place, the moment you never forget, the call that changed how you work✅ What gets lost when we treat people like tickets, and what gets found when we don'tWhether you fix things for a living, manage people who do, or just like good stories from someone who has been everywhere and met everybody, The Human Diagnostic gives you the part of the job that never shows up in an invoice.📍 Proudly based in Kingfisher and serving Edmond, Guthrie, Yukon, Mustang, Piedmont, Logan County, Canadian County, Blaine County, Major County, Garfield County, and the greater Oklahoma City metro area. Hartzell's Heat & Air blends old-school integrity with cutting-edge technology, from digital diagnostics to smart-home HVAC integrations.Connect with Hartzell's Heat & Air:📲 Facebook: facebook.com/hartzellsheatair🐦 X (Twitter): x.com/HartzellsHVAC▶️ YouTube: youtube.com/@hartzellsheatair6003💼 LinkedIn: linkedin.com/in/dave-hartzell-7a687515📧 Contact Us: office@hartzellsheatair.comEvery call is a story. Every story is a person.🔔 Subscribe to The Human Diagnostic and ride along.📞 Need HVAC help in Central Oklahoma? Call (405) 375-4822🌐 hartzellsheatair.com

  1. 22h ago

    The Heat Pump She Suddenly Saw on Every Street

    A customer in Hennessey told me, two weeks after I installed a new heat pump in her house, that she could not believe how many heat pumps were going in around town. She said she saw them everywhere. She named six driveways within a mile of her house where a new outdoor unit was sitting in the gravel. I told her, kindly, that those units had been there for at least the last year. Most of them since before her install. What had changed was not the town. It was her. There is a name for this. The linguist Arnold Zwicky coined the phrase frequency illusion in 2005, and recorded the older nickname for it, the Baader-Meinhof phenomenon. It has two parts. First, selective attention: once you notice a thing, your attention grows a hook for it and starts catching instances you used to walk right past. Second, confirmation bias: you remember the times you noticed, and you forget all the times you did not. It is the cognitive version of buying a red truck and then deciding the world is full of red trucks. The trucks were always there. You just did not see them as a category before. Now you do. She had spent six weeks reading about heat pumps, asking me questions about heat pumps, watching me install one, and then living in a house with one. Heat pumps were a category in her head now, and the category had a hook. Every outdoor unit she drove past snagged on it. Six snags in a week felt like a wave. I did not take the feeling away from her. She was right that heat pump installs have climbed over the last decade around here, and her count was about the right order of magnitude for what was actually out there. I just did not point out that the six units had not appeared in the last two weeks. The pattern she felt was real. It was not news about the town. Core line: "New knowledge does not change the town. It changes the looker." Give Us A Shout Thanks for tuning in to Hartzell's Heat & Air, HVAC in Kingfisher and central Oklahoma. From Kingfisher to coast-to-coast consulting, we design, install, and maintain smart, efficient systems that deliver year-round comfort. We're family-run and powered by 47+ years of experience. Whether it's AI-powered thermostats, geothermal systems, or classic tune-ups, we deliver upfront pricing, expert care, and warranties that back it all up. 🛠️ Book Online: Book Online 🌐 www.hartzellsheatair.com 📞 (405) 375-4822 🚛 Trane Comfort Specialist • Mitsubishi Diamond Dealer • ClimateMaster Elite 🛡️ VIP Comfort Club • Remote Monitoring • Extended Warranties 📲 Follow us for tips, updates, and real-world installs: YouTube: @hartzellsheatair6003 X: x.com/HartzellsHVAC Facebook: facebook.com/hartzellsheatair LinkedIn: Dave Hartzell Built on trust. Backed by warranty. Designed for comfort.

  2. 22h ago

    The Old Furnace Repair That Proved Nothing

    A man in Calumet pointed at the furnace in his basement and told me they do not make them like they used to. It was forty-one years old and still running. He was certain that furnace was proof the old way was the better way, and that modern furnaces, with their control boards and variable-speed motors, were over-engineered junk that would never last. I think about Abraham Wald every time I hear that. In 1943, the military wanted to armor their bombers where the returning planes had the most bullet holes. Wald told them they were looking at the wrong planes. The ones hit in the fatal spots never came back to be counted. The holes on the survivors marked the places a plane could take a hit and still fly home. That old furnace is the plane that came back. The man cannot see all the furnaces from that same era that failed and got hauled to the scrap yard twenty and thirty years ago. They are not in his basement to point at. He sees the one that survived, and he sees it because it survived. What kept his furnace alive is not mostly the design of that era. It is the specific history of that one unit: a dry conditioned space, a dedicated circuit, stable voltage, correct airflow, and a homeowner who changed filters. Most of that production run got less ideal care, and most of it failed. His is the rare one. The same trap runs backwards on new equipment. Somebody reads about three control boards that failed in a bad batch and concludes every high-efficiency furnace is junk. The three complaints are visible. The hundreds of thousands of boards running fine for years are invisible, because nobody writes a post about the part that just works. So I do not argue a man out of loving his furnace. I honor the survivor without ratifying the conclusion. I tell him the Wald story, because the image of armoring the wrong planes lands in a way a statistics lecture never will. His furnace is real. What it proves is only that it survived. Core line: "The old surviving furnace was selected by survival. The complaining forum post was selected by failure. Neither one is representative of the underlying population." Give Us A Shout Thanks for tuning in to Hartzell's Heat & Air, HVAC in Kingfisher and central Oklahoma. From Kingfisher to coast-to-coast consulting, we design, install, and maintain smart, efficient systems that deliver year-round comfort. We're family-run and powered by 47+ years of experience. Whether it's AI-powered thermostats, geothermal systems, or classic tune-ups, we deliver upfront pricing, expert care, and warranties that back it all up. 🛠️ Book Online: Book Online 🌐 www.hartzellsheatair.com 📞 (405) 375-4822 🚛 Trane Comfort Specialist • Mitsubishi Diamond Dealer • ClimateMaster Elite 🛡️ VIP Comfort Club • Remote Monitoring • Extended Warranties 📲 Follow us for tips, updates, and real-world installs: YouTube: @hartzellsheatair6003 X: x.com/HartzellsHVAC Facebook: facebook.com/hartzellsheatair LinkedIn: Dave Hartzell Built on trust. Backed by warranty. Designed for comfort.

  3. 22h ago

    She Trusted My HVAC Truck Before I Fixed A Thing

    A woman hired me once for a reason that had nothing to do with whether I was any good. She told me so herself, right there on the porch, before I had even opened my bag. I have seen your truck go by for years, she said. That is why I called you. Not a review, not a friend who swore by me. My truck. She had watched that old truck roll down her road a thousand times over the years, headed to somebody else's house, and somewhere along the way it went from a thing she did not notice to a thing she trusted. By the time she called, she already believed in me a little, and I had not earned one bit of it yet. In 1968, a psychologist named Robert Zajonc published a paper with a plain title, Attitudinal Effects of Mere Exposure. He showed people made-up words, characters they could not read, and faces of strangers, and the only thing he changed was how many times a person saw each one. The rule came back clean every time. The more often someone saw a thing, the more they liked it. Not because it was good. Just because it had become familiar. I see this all over my trade once you know to look for it. People stick with the brand that was on the furnace in the house they grew up in, even when a better one is sitting right next to it. They call the company whose name is on the ball field bench or the back of the church bulletin, not because that company is good, but because that name has worn a groove in their memory. The young me got this wrong for years. I used to get sour that some established outfit got the call just because folks had seen their sign longer than mine. I thought being good ought to be enough. But being good is invisible until somebody lets you in the door, and familiarity is a lot of what opens the door. Standing around bitter about that is like being mad at gravity. What works is understanding it and then earning what it gave you. Familiarity handed me that customer on credit, and credit has to be paid back with the actual work. So I did the work clean. I showed her what I found. Familiarity got me in the room, and the work is what kept me on the other side of the door. She is still a customer years later. Core line: "Familiarity gets you in the room. What you do in the room is what makes it real." Give Us A Shout Thanks for tuning in to Hartzell's Heat & Air, HVAC in Kingfisher and central Oklahoma. From Kingfisher to coast-to-coast consulting, we design, install, and maintain smart, efficient systems that deliver year-round comfort. We're family-run and powered by 47+ years of experience. Whether it's AI-powered thermostats, geothermal systems, or classic tune-ups, we deliver upfront pricing, expert care, and warranties that back it all up. 🛠️ Book Online: Book Online 🌐 www.hartzellsheatair.com 📞 (405) 375-4822 🚛 Trane Comfort Specialist • Mitsubishi Diamond Dealer • ClimateMaster Elite 🛡️ VIP Comfort Club • Remote Monitoring • Extended Warranties 📲 Follow us for tips, updates, and real-world installs: YouTube: @hartzellsheatair6003 X: x.com/HartzellsHVAC Facebook: facebook.com/hartzellsheatair LinkedIn: Dave Hartzell Built on trust. Backed by warranty. Designed for comfort.

  4. 1d ago

    The Thermostat Problem That Was Really a Cold Chair

    A woman in Okarche told me on the phone that her whole house was cold. She wanted me out the same day. I asked her where in the house she had measured. She had not measured anywhere. She just knew. I drove out. I put my hand on the supply register in her living room, then I walked the house room by room. The bedrooms were warm. The kitchen was warm. The bonus room over the garage was warm. Only the living room, where she spent her whole day in a recliner parked directly under the return, was running a few degrees cold. Her body was cold, so she had concluded the house was cold. The house was not cold. One chair was cold, by about three degrees, and her body had generalized from that chair to every room she was not sitting in. I am not telling that to make fun of her. I have lived inside that same mistake in hundreds of houses, and a few times in my own. Anthony Greenwald wrote about this in 1980 in a paper he called the totalitarian ego. The mind treats its own point of view as the default version of reality, and it does not stop to poll the other rooms before it decides. It decides, then it reads everything after as evidence. The customer who is cold under the return concludes the house is cold. The one who hears the blower from the bedroom concludes the blower is too loud. I see it most in couples fighting over the thermostat. He is hot at seventy-two, she is cold at seventy-two, and each one is sure seventy-two is objectively wrong because each body is the canonical version of what seventy-two should feel like. Neither one is lying. The thermostat is for the house, not for the body. The body is for clothing. The quiet version is the one I have to watch in myself. If I walk in cold, I will decide the house is cold. That is what the gauges are for. The manometer does not care whether I am hot or tired. It reports what it reports. The customer hires me because I carry the tools that do not lie, so I do not let my own body override them. The woman in Okarche moved her recliner three feet, out from under the return, and sat back down. The chair felt different. The house had never been failing her. One chair was, in a narrow way, over a duct decision made decades before she ever picked that spot. I did not charge her a diagnostic. The visit was the diagnostic. Core line: "Sometimes the body is right about the body and wrong about the building, and that is okay, that is just how senses work." Give Us A Shout Thanks for tuning in to Hartzell's Heat & Air, HVAC in Kingfisher and central Oklahoma. From Kingfisher to coast-to-coast consulting, we design, install, and maintain smart, efficient systems that deliver year-round comfort. We're family-run and powered by 47+ years of experience. Whether it's AI-powered thermostats, geothermal systems, or classic tune-ups, we deliver upfront pricing, expert care, and warranties that back it all up. 🛠️ Book Online: Book Online 🌐 www.hartzellsheatair.com 📞 (405) 375-4822 🚛 Trane Comfort Specialist • Mitsubishi Diamond Dealer • ClimateMaster Elite 🛡️ VIP Comfort Club • Remote Monitoring • Extended Warranties 📲 Follow us for tips, updates, and real-world installs: YouTube: @hartzellsheatair6003 X: x.com/HartzellsHVAC Facebook: facebook.com/hartzellsheatair LinkedIn: Dave Hartzell Built on trust. Backed by warranty. Designed for comfort.

  5. 1d ago

    The Uniform of Calm I Put On for a Furnace Repair

    A customer once told me I was the calmest man she had ever met. I thanked her. I did not tell her the truth, which was that I had been up since four that morning with a sick dog and a bad night, and the calm she was admiring was something I had put on that day like a clean shirt. There is a kind of work in this trade that never shows up on an invoice. Over forty-seven years it has cost me more energy than any physical part of the job. When I walk into a house, the customer reads my face in the first three seconds. If I walk in tense, she gets tense. If I walk in steady, her shoulders come down an inch. In 1983 a sociologist named Arlie Hochschild gave this a name. She called it emotional labor, the work of managing your own feelings to produce a feeling in someone else, as part of the job. A scared homeowner with a flooded basement and a dead furnace does not need a tech who is also visibly stressed. She needs one who is calm enough for both of them. Hochschild made a distinction that took me decades to understand. Surface acting is faking the feeling. You smile while you are seething inside, and the gap between the smile and the truth grinds on you all day. That is one of the main roads to burnout. The techs I have watched leave this trade bitter were surface acting for years until it hollowed them out. What has kept me in this for forty-seven years without going sour is the other kind, deep acting. I do not fake the calm. I build it. Before I knock on a door, even on a bad morning, I take a second in the truck. I let the night with the sick dog stay in the truck. I decide, on purpose, that for the next hour this customer's problem is the only problem. By the time I knock, the calm is real. There is a danger in getting too good at it. The calm man hides his own bad nights so well that nobody thinks to ask. There were years I was so busy managing everyone else's state that I lost track of my own. So now, with the people who actually know me, I try to take the uniform off. That customer was right that I was calm. She just did not know the calm was something I made that morning, out of a bad night, on purpose, because that is part of the work. Core line: "The calm is for the customer. It is a real gift and I give it on purpose. But it is not the whole of me, and the trap is forgetting that." Give Us A Shout Thanks for tuning in to Hartzell's Heat & Air, HVAC in Kingfisher and central Oklahoma. From Kingfisher to coast-to-coast consulting, we design, install, and maintain smart, efficient systems that deliver year-round comfort. We're family-run and powered by 47+ years of experience. Whether it's AI-powered thermostats, geothermal systems, or classic tune-ups, we deliver upfront pricing, expert care, and warranties that back it all up. 🛠️ Book Online: Book Online 🌐 www.hartzellsheatair.com 📞 (405) 375-4822 🚛 Trane Comfort Specialist • Mitsubishi Diamond Dealer • ClimateMaster Elite 🛡️ VIP Comfort Club • Remote Monitoring • Extended Warranties 📲 Follow us for tips, updates, and real-world installs: YouTube: @hartzellsheatair6003 X: x.com/HartzellsHVAC Facebook: facebook.com/hartzellsheatair LinkedIn: Dave Hartzell Built on trust. Backed by warranty. Designed for comfort.

  6. 1d ago

    The Air Conditioner Repair Where She Fed Me Lunch

    Her air conditioner had been dead for two days in an Oklahoma August, and the first thing she did when I walked in was hand me lunch. Not water. Not a chair. A sandwich, made before I had my tools out of the truck. The house was hot enough that I could feel it in my chest. Her kids were cranky. She was stressed in a way she was working hard to hide. And her whole response to all of that was to take care of me. For a long time I just filed that under people being nice. It is more specific than that. In 2000, a psychologist named Shelley Taylor pointed out that the old fight-or-flight picture of stress was built mostly on men. A lot of people, and her research found it more strongly in women, do not fight and do not flee under threat. They tend and they befriend. They pull their kids close and they turn toward whoever is standing there. I have watched techs get this exactly backwards. A guy gets handed a sandwich and waves it off because he is busy, or reads it as the customer trying to butter him up before the bill. When you push that away coldly, you are not just declining food. You are shoving away the one thing her nervous system is using to hold itself together. So I take the sandwich. I say thank you and I mean it. I let her show me where the kids are. Then I do the thing she actually needs underneath all that hospitality, which is to be calm and competent and fast, and make the threat to her house go away. Forty-seven years in this trade has shown me the same thing about the guys who last. The ones who do not burn out are usually the ones who tend and befriend too. They check on each other. They call the older hand when they are stuck instead of white-knuckling it alone. The lone-wolf toughness looks strong. It is the connected guys who go the distance. She did not need me to admire her sandwich. She needed me to take it, and then fix her house. So that is what I did. Core line: "She did not need me to admire her sandwich. She needed me to take it, and then fix her house." Give Us A Shout Thanks for tuning in to Hartzell's Heat & Air, HVAC in Kingfisher and central Oklahoma. From Kingfisher to coast-to-coast consulting, we design, install, and maintain smart, efficient systems that deliver year-round comfort. We're family-run and powered by 47+ years of experience. Whether it's AI-powered thermostats, geothermal systems, or classic tune-ups, we deliver upfront pricing, expert care, and warranties that back it all up. 🛠️ Book Online: Book Online 🌐 www.hartzellsheatair.com 📞 (405) 375-4822 🚛 Trane Comfort Specialist • Mitsubishi Diamond Dealer • ClimateMaster Elite 🛡️ VIP Comfort Club • Remote Monitoring • Extended Warranties 📲 Follow us for tips, updates, and real-world installs: YouTube: @hartzellsheatair6003 X: x.com/HartzellsHVAC Facebook: facebook.com/hartzellsheatair LinkedIn: Dave Hartzell Built on trust. Backed by warranty. Designed for comfort.

  7. 1d ago

    The Broken Compressor She Swore She Predicted

    A woman in Dover told me, right after I condemned her compressor, that she had known all along it was going to go out this summer. She said she had felt it. She said the unit had been telling her since spring. I asked her, gently, what the unit had been telling her back in spring. She thought about it. She said it had been making a different sound. She could not say what kind of different. Baruch Fischhoff wrote about this in 1975. He had people read about historical events, then estimate how likely each outcome had been. The ones who were told the outcome first rated it as far more inevitable than the ones who were not, and even when he told them to ignore what they knew, they could not. He called it creeping determinism. Once a thing has happened, it looks like the only thing that could have happened. That is hindsight bias, and I see it after almost every major failure. Before the compressor quit, those spring sounds were the background noise of a system running normally. After it quit, every quiet click and odd hum became, in memory, a warning. The unit really had been making sounds. Most units make sounds. The failure is what made those particular ones significant, after the fact. I have to be careful here. She was reporting something true about herself, that she pays attention to her house and she does hear things. I do not want to flatten that. So I do not tell her she could not have known. I tell her she was paying attention, that she picked up on something. Then I say, softly, that even with my gauges and my training I could not have told her in March that this was the summer it would go. Nobody could. The harder version is the customer who turns it on themselves, who decides after a failure that they were careless for not acting, that it is their fault. It is not. A compressor fails after fifteen or twenty years of cycles because it was always going to, not because someone missed a sign that was never loud enough to catch. What she was really after, I think, was a little agency in a moment that had stripped her of it. I let her keep her version of having known, I make sure the replacement gets done right, and I drive away thinking about Fischhoff and how, once a thing has happened, the mind can no longer remember that it had not yet happened. Core line: "The failure converted the unease into a specific premonition. The premonition was not specific at the time." Give Us A Shout Thanks for tuning in to Hartzell's Heat & Air, HVAC in Kingfisher and central Oklahoma. From Kingfisher to coast-to-coast consulting, we design, install, and maintain smart, efficient systems that deliver year-round comfort. We're family-run and powered by 47+ years of experience. Whether it's AI-powered thermostats, geothermal systems, or classic tune-ups, we deliver upfront pricing, expert care, and warranties that back it all up. 🛠️ Book Online: Book Online 🌐 www.hartzellsheatair.com 📞 (405) 375-4822 🚛 Trane Comfort Specialist • Mitsubishi Diamond Dealer • ClimateMaster Elite 🛡️ VIP Comfort Club • Remote Monitoring • Extended Warranties 📲 Follow us for tips, updates, and real-world installs: YouTube: @hartzellsheatair6003 X: x.com/HartzellsHVAC Facebook: facebook.com/hartzellsheatair LinkedIn: Dave Hartzell Built on trust. Backed by warranty. Designed for comfort.

  8. 1d ago

    The Furnace Repair She Remembered Wrong On Purpose

    A woman called me a year after a job to thank me for a furnace repair I barely remembered. It had been a long one. Her furnace quit on the coldest week of the winter, and I was at her house most of the day, pulling the blower, driving back to the shop for a part, coming back. By any honest accounting it was a hard, drawn-out afternoon. But that is not how she remembered it. She told me it was the best service experience she had ever had, and the thing she kept coming back to was the very end, when I sat down at her kitchen table, drew her a little diagram of what had failed, and told her the furnace had a good ten years left. There is a name for what she did to that memory. In the early 1990s, Daniel Kahneman, Donald Redelmeier, and Barbara Fredrickson found that people do not remember an experience by averaging all its minutes. They remember it by two moments, the most intense one and the last one. The long middle barely counts. Kahneman called that duration neglect. The low point of her day was in the middle, when I told her I had to drive back to the shop. If you had stopped her right then, she would have called it a disaster. But the day did not end there. It ended with me unhurried at her table, no pressure, telling her the news was good. The end is what the memory kept. I did not know the science back then. I sat down because forty-seven years has taught me that the last few minutes of a call are the minutes the customer keeps. I watch young techs do beautiful work for three hours and then pack up in a rush while the customer is still standing there with a question on her face. They get it backwards. The end of a call is not cleanup. It is the part that writes the memory. So on a hard call, when the day has been long and I am worn down too, I have learned not to limp across the finish line. I finish on purpose. Calm voice, clear explanation, a real goodbye. That woman did not remember her furnace day wrong. She remembered it the way memory actually works. She kept the end, and the end was good. Core line: "The middle of the job is mine. The end of the job is theirs." Give Us A Shout Thanks for tuning in to Hartzell's Heat & Air, HVAC in Kingfisher and central Oklahoma. From Kingfisher to coast-to-coast consulting, we design, install, and maintain smart, efficient systems that deliver year-round comfort. We're family-run and powered by 47+ years of experience. Whether it's AI-powered thermostats, geothermal systems, or classic tune-ups, we deliver upfront pricing, expert care, and warranties that back it all up. 🛠️ Book Online: Book Online 🌐 www.hartzellsheatair.com 📞 (405) 375-4822 🚛 Trane Comfort Specialist • Mitsubishi Diamond Dealer • ClimateMaster Elite 🛡️ VIP Comfort Club • Remote Monitoring • Extended Warranties 📲 Follow us for tips, updates, and real-world installs: YouTube: @hartzellsheatair6003 X: x.com/HartzellsHVAC Facebook: facebook.com/hartzellsheatair LinkedIn: Dave Hartzell Built on trust. Backed by warranty. Designed for comfort.

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About

Looking for honest stories about people, not product reviews? You're in the right place.The Human Diagnostic isn't a how-to HVAC podcast. It's what a 45-year Master Technician notices about people after 90,000 service calls across gas plants, oil rigs, hospital preservation systems, high-rises, feedlots, walk-in freezers, and residential homes all over Central Oklahoma.Hosted by Dave Hartzell, each episode tells a real story from a real service call. Sometimes he's driving to the job and predicting what he's about to walk into. Sometimes he just left and he's still working through what he saw. Either way, the story turns out to be about more than HVAC.Topics you'll hear across the season:✅ The customer nobody wanted to take, and what changed when someone finally did✅ Why the person researching their broken AC at midnight isn't being difficult, they're scared✅ What 45 years of walk-ins, weddings, funerals, and broken water heaters teaches you about anxiety✅ The tech who can fix anything but can't explain it, and why the customer doesn't trust him✅ The review you can't place, the moment you never forget, the call that changed how you work✅ What gets lost when we treat people like tickets, and what gets found when we don'tWhether you fix things for a living, manage people who do, or just like good stories from someone who has been everywhere and met everybody, The Human Diagnostic gives you the part of the job that never shows up in an invoice.📍 Proudly based in Kingfisher and serving Edmond, Guthrie, Yukon, Mustang, Piedmont, Logan County, Canadian County, Blaine County, Major County, Garfield County, and the greater Oklahoma City metro area. Hartzell's Heat & Air blends old-school integrity with cutting-edge technology, from digital diagnostics to smart-home HVAC integrations.Connect with Hartzell's Heat & Air:📲 Facebook: facebook.com/hartzellsheatair🐦 X (Twitter): x.com/HartzellsHVAC▶️ YouTube: youtube.com/@hartzellsheatair6003💼 LinkedIn: linkedin.com/in/dave-hartzell-7a687515📧 Contact Us: office@hartzellsheatair.comEvery call is a story. Every story is a person.🔔 Subscribe to The Human Diagnostic and ride along.📞 Need HVAC help in Central Oklahoma? Call (405) 375-4822🌐 hartzellsheatair.com

Information

  • Creator
    Dave Hartzell's Heat & Air - Kingfisher,OK
  • Years Active
    2026
  • Episodes
    157
  • Rating
    Clean
  • Copyright
    © 2026 The Human Diagnostic
  • Show Website
    The Human Diagnostic