『The Human Diagnostic』のカバーアート

The Human Diagnostic

The Human Diagnostic

著者: 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't

Whether 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.com

Every 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

© 2026 The Human Diagnostic
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  • The Repair Estimate She Couldn't Accept Without a Second Opinion
    2026/09/10

    He asked me what it was going to cost before I had the lid off the unit, and when I said I didn't know yet, he asked again, slower, like I hadn't heard him.

    Late July, the kind of week where the sun is already working at seven in the morning. Brick ranch north of Kingfisher, well kept, the grass edged along the driveway. He was in his early sixties, retired from a job where he had run numbers for a living, and he had the air conditioner's paperwork on the kitchen table in a folder before I walked in.

    The system had quit the night before. Outdoor unit humming, no fan, house climbing through the low eighties. That is a fifteen-minute diagnosis most days, and the fix is usually one of three parts. I have done that call a thousand times.

    But the trouble had started before I got there. Shelby had given him the arrival window that morning, three hours, and he had called back twice. Not angry. He wanted it narrowed. He wanted to know if it was going to be the front of the window or the back. He wanted to know what would make it late.

    When I pulled in he met me at the truck and the first thing he said was, "Just tell me what this is going to run me."

    I said what I always say, that I'd know a lot more in about twenty minutes. He said he understood that, and then asked me for a range. I gave him a wide one, because a wide one was honest. He wanted it narrower. I told him I couldn't narrow it until I opened the unit. He said, "Ballpark, then. You've done this a long time."

    That is where a lot of technicians get short with people. I used to. Because from where I stand, he is asking me to guess, and a guess I say out loud becomes a promise I didn't mean to make. And from where he stands, I am refusing to answer a simple question.

    Core line: "When he asks for a ballpark, I say, "I'd rather show you the actual number in twenty minutes than give you a number now that I have to walk back." Then I go to 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:
    https://book.housecallpro.com/book/Hartzells-Heat--Air/4a569038b3dc460daf2d5f6497b18351?v2=true
    🌐 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: https://x.com/HartzellsHVAC
    Facebook: facebook.com/hartzellsheatair
    LinkedIn: Dave Hartzell

    Built on trust. Backed by warranty. Designed for comfort.

    続きを読む 一部表示
    19 分
  • He Was Certain He Was The Reasonable One About The Heat Pump
    2026/09/10

    He told me the last company had been working him, and about nine seconds later he told me exactly what was wrong with his air conditioner and how he knew.

    Late August, one of those weeks where it never gets below eighty at night and the equipment does not get a rest. Brick ranch east of town, single story, built somewhere in the middle seventies, big elms on the west side doing the house a real favor. Man in his fifties, met me in the driveway before I had the truck door shut. Three ton split system, about twelve years on it. Running all day, house sitting around eighty two.

    Here is the whole story he gave me, in order, standing in the drive.

    Last spring another outfit came out. Their guy told him the indoor coil was leaking and needed to be replaced, and quoted a number he thought was ridiculous. He said no. He called somebody else who put refrigerant in it, and it cooled fine the rest of the summer for a fraction of what the first company wanted.

    Then he says, and this is close to word for word: I know how this works, that first guy was on commission and he saw an old system and a man with no way to check him. It just needs freon. That is not me being cheap, that is common sense.

    Two claims, back to back, out of the same mouth. The other man's judgment was bought. His own judgment was plain sense.

    Now I want to tell you what I did with that, because I did not pull into the driveway clean either.

    I know the outfit he was talking about. Bigger shop, salespeople, the kind of place where a coil quote and a commission sit in the same paragraph. So while he was talking I had already half decided the coil call had been a stretch and that I was going to be the one who found the real trouble. I was building the same kind of case he was. I just had it pointed the other direction.

    Core line: "And then they were asked how the most accurate and objective measurement available would rate them, compared to how they had just rated themselves a minute earlier."

    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:
    https://book.housecallpro.com/book/Hartzells-Heat--Air/4a569038b3dc460daf2d5f6497b18351?v2=true
    🌐 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: https://x.com/HartzellsHVAC
    Facebook: facebook.com/hartzellsheatair
    LinkedIn: Dave Hartzell

    Built on trust. Backed by warranty. Designed for comfort.

    続きを読む 一部表示
    23 分
  • The Woman Who Couldn't Believe the Repair Held
    2026/09/10

    By the time I pulled out of the shop she had called three times, and nothing about her job had changed since the first one.

    First full week of July, heat index sitting around 105 by early afternoon. Two story house in one of the newer additions, built maybe twenty years ago, the kind where the upstairs runs eight degrees warmer than the downstairs no matter what anybody does about it. She works from home and she is on the phone most of the day. Blower running fine, air coming out of the vents at room temperature.

    She called at 7:40 in the morning. I put her on for that afternoon, a window from three to six, which in the first real heat of July is a good answer and she knew it.

    Then she called at 9:15. Then at 11:30. Then at ten till two.

    Nothing had changed in between. She had nothing new to tell me and I had nothing new to tell her. Every time she got the same true sentence back: you are on the schedule, Dave is coming this afternoon, the window stands.

    For a lot of years I read calls like that one way, and the way I read them was wrong. I figured she either did not believe the answer or she was working the phone trying to get bumped ahead of somebody quieter. I have been short with people over it. Not rude, but clipped, the voice you use when you want a conversation to be over.

    What she was doing was neither of those things.

    There is a paper from 1987 by Cindy Hazan and Phillip Shaver called Romantic love conceptualized as an attachment process. What they actually did is not what you picture when somebody says study.

    Core line: "It teaches her that calling is the thing that moved the truck, so next time it is five calls, and it takes the afternoon away from somebody who waited quiet since Monday."

    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:
    https://book.housecallpro.com/book/Hartzells-Heat--Air/4a569038b3dc460daf2d5f6497b18351?v2=true
    🌐 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: https://x.com/HartzellsHVAC
    Facebook: facebook.com/hartzellsheatair
    LinkedIn: Dave Hartzell

    Built on trust. Backed by warranty. Designed for comfort.

    続きを読む 一部表示
    22 分
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