Dave Hartzell's Heat & Air - Kingfisher,OK

The Human Diagnostic

Business EN ↓ 145 episodes

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 sa...

Author

Dave Hartzell's Heat & Air - Kingfisher,OK

Category

Business

Podcast website

www.buzzsprout.com

Latest episode

Jul 5, 2026

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Episodes

Why we ignore problems until they break 22.04.2026

Format: Post-call Runtime: ~8 minutes Source: Psychology , ostrich effect (Galai & Sade, 2006); avoidance coping; information aversion This call was longer than it had to be. Not because the repair was complicated. Because by the time she called, the situation had gotten a lot bigger than it needed to be. She called in late July. Central Oklahoma in late July. The system had been struggling si...

Hand Them the Gauge 22.04.2026

Format: Post-call Runtime: ~8 minutes Source: Clinical psychology , control as anxiety management; Ellen Langer's perceived control research (Harvard, 1975) Just got back. Washed up. Sitting here thinking about a call that went fine, where the customer was perfectly pleasant, and where I still felt watched every single second I was in that house. He met me in the driveway. That's not unu...

Why some people apologize for existing 22.04.2026

Format: Post-call Runtime: ~8 minutes Source: Trauma psychology , fawn response, people-pleasing, Pete Walker's four F's (fight/flight/freeze/fawn) It's getting late and I want to get this down before the details soften. She called for a tune-up. Routine spring call. When I pulled up the house was well-kept, quiet neighborhood, small yard. She opened the door before I knocked. The f...

How to escape the sunk cost trap 22.04.2026

Format: Pre-call and post-call Runtime: ~8 minutes Source: Behavioral economics , sunk cost fallacy, loss aversion (Kahneman and Tversky) Before I tell you about this call I want to tell you about a truck I drove for eleven years. It was a good truck early on. Solid. By year nine it had 240,000 miles on it and I'd put in two engines, a transmission, and more in parts and labor than the truck...

Memory Lessons From an HVAC Technician 22.04.2026

Format: Post-call Runtime: ~8 minutes Source: Psychology Is Simplified , "Psychology of People Who Forget Names Easily" Long day. Five calls. I'm thinking about the fourth one. He's been a customer for seven years. I've been to his house probably a dozen times. The system I put in , a Trane, two-stage, went in during a rough August , he's had me back for tune-ups, a b...

Why logic fails the overthinking brain 22.04.2026

Format: Post-call (and post-evening, post-next-morning) Runtime: ~8 minutes Source: Psychology Is Simplified , "Psychology of Overthinkers" This one takes more than one sitting to tell. It spans an afternoon and an evening and the next morning, and none of it is bad. I want to be clear about that upfront. The customer was fine. The repair was fine. But I got three contacts in eighteen ho...

The brain science of a curious repair 22.04.2026

Format: Post-call Runtime: ~8 minutes Source: Psychology Is Simplified , "Psychology of People Who Remember Random Facts" Long drive home. It's getting dark. I stopped for coffee. This one I want to think through slowly because it was a good call, an unusual one, and I don't get them this good very often. He called about a condenser unit that had been making noise. Not the nois...

The Hidden Burden of Noticing Everything 22.04.2026

Format: Post-call Runtime: ~8 minutes Source: Psychology Is Simplified , "Psychology of People Who Are Psychologically Over-Aware" Headed back in. Late afternoon. The kind of call you replay not because anything went wrong but because something in it was unusual and I'm still trying to name it. She called because her system had been short-cycling. Turning on, running a few minutes,...

Reading human trauma in an Oklahoma driveway 22.04.2026

Format: Post-call Runtime: ~8 minutes Source: Psychology Is Simplified , "Psychology of People Who Go Quiet When They're Hurt" Heading back toward town. Windows down. It's one of those calls that doesn't feel like anything went wrong but I keep thinking about it anyway. She called for a tune-up. End of May, system hadn't run much yet, wanted it checked before summer....

The HVAC Technician and Maladaptive Daydreaming 22.04.2026

Format: Post-call Runtime: ~8 minutes Source: Psychology Is Simplified , "Psychology of Maladaptive Daydreaming" On my way home and I'm trying to figure out how to describe this one. Nothing went wrong. The system's running. She seemed satisfied when I left. But there was something about the call that I'm still placing. She'd called about a unit that wasn't cooli...

Hearing the AC Fault Before the Gauges 21.04.2026

I've been around long enough to know that some folks just feel everything more than the rest of us. The hum from the air handler, the whoosh from a register, the clicking of a contactor. To them it's not background noise, it's a presence in the house. Had a service call out near Hennessey last spring. Lady met me at the door before I even knocked. Said her new system was driving her...

The Biology of the Blank Stare 21.04.2026

A Tuesday afternoon in August. Compressor seized on a 19-year-old system in a brick ranch south of Kingfisher. A woman at her kitchen table said okay. Said okay again. Then her eyes went somewhere past the table and didn't come back. Not crying. Not angry. Not weighing the numbers. Just absent. Most customer service training covers two states: mad and scared. There's a third. Dr. Stephen...

The Five Star Review Dave Hartzell Forgot 21.04.2026

About two years ago, someone left me a five star review that I couldn't place. It wasn't that I couldn't remember the customer. I couldn't quite recognize the interaction they described. The review said I was patient during a difficult conversation about whether to repair or replace, that I took the time to explain the economics, that they felt respected the whole way through....

The HVAC Call That Became The Reason 21.04.2026

I want to talk about a call from a long time ago. Thirty-something years. I still know the address. July. Late twenties, maybe twelve years in the trade, sent out alone on what should have been a routine call. Older woman, eighties, living by herself a few miles east of town. System had quit. Her daughter called it in. She met me at the door. First thing she said: I wasn't going to call. My d...

The One Who Wanted the Data 21.04.2026

"What's the leak rate? Linear decline or does it accelerate?" Structural engineer. Five minutes into the call he's already asked three follow-up questions better than most customers ask all day. The system had a refrigerant loss and a blower motor bearing starting to go. Standard enough. But this customer isn't trying to make a decision, the decisions are essentially made...

Just Got Back on Their Feet 21.04.2026

Young guy, first house, early summer. At the door he says: "I want to be upfront. We have some budget flexibility right now, but not unlimited. If there's a range of options, I'd appreciate knowing the full range." That's a well-formed sentence for a diagnostic visit. The system had a dirty coil and a refrigerant leak that had been running for a while. Dave gives him the f...

The Art of the Graceful Departure 21.04.2026

This source explores the psychological complexity of ending a service call with a lonely customer who uses stalling tactics to avoid saying goodbye. Referencing Erving Goffman’s research on interaction rituals , the text explains how adding new topics at the door is a way to prolong human contact. While a technician might feel the urge to leave quickly, the author suggests that abrupt departures c...

Triangulation and the Invisible Ledger of Family Systems 13.04.2026

This source recounts an HVAC technician's encounter with a complex family dynamic while performing a routine furnace repair for an elderly client and her daughter. The narrative serves as a practical case study for triangulation , a psychological concept where a third party is unintentionally pulled into a two-person conflict to alleviate emotional tension. By analyzing the situation through...

The High Cost of Honesty: The One Who Overpaid 13.04.2026

In this narrative, an HVAC technician reflects on a customer who intentionally overpaid by $150 to express gratitude for his rare honesty in a historically deceptive industry. The text uses the sociological theories of Marcel Mauss and Robert Cialdini to explain that this payment was not a standard tip, but a social gift intended to establish a bond of reciprocity . By exceeding the invoice, the c...

The Anchor of Experience: Fluid and Crystallized Intelligence 13.04.2026

The provided text explores the psychological distinction between fluid and crystallized intelligence through the personal narrative of an HVAC technician assisting an elderly client. While fluid intelligence , or raw processing speed, naturally declines with age, crystallized intelligence allows older individuals to utilize a lifetime of accumulated knowledge to solve new problems. The technician...

The Human Diagnostic: Competence, Fatigue, and the Empathic Cost 13.04.2026

This narrative explores the psychological concept of compassion fatigue through the lens of a veteran HVAC technician reflecting on a challenging work week. While the author maintains his technical competence despite extreme exhaustion, he identifies a temporary decline in his ability to provide genuine human presence and empathy to a nervous customer. By integrating the research of Charles Figley...

The Wrong Person: Transference and the Professional Template 13.04.2026

This text explores the psychological concepts of transference and countertransference through the real-world lens of a veteran HVAC technician's customer interaction. While on a routine service call, the technician realizes he is subconsciously reacting with unwarranted coldness toward a client because her direct demeanor mirrors a difficult person from his past. He utilizes the theory of the...

The Right Shape: Navigating Social Hunger in Service Relationships 13.04.2026

The provided text explores the complex boundaries between professional service and personal connection through the story of an HVAC technician and a lonely, retired client. Drawing on John Cacioppo’s research , the narrative frames loneliness as a biological "social hunger" that occasionally drives individuals to seek deep companionship in inappropriate or one-sided professional contexts...

The Cognitive Load of Managing More Than a System 13.04.2026

This account describes an HVAC technician's encounter with a customer whose physical illness significantly depleted her cognitive energy and decision-making bandwidth. Based on Howard Leventhal’s self-regulation model , the narrative explains how chronic health struggles consume the mental resources typically used for everyday logic and problem-solving. Recognizing the client's fatigue,...

House People: Maintenance, Grief, and Continuing Bonds 13.04.2026

The provided text examines a specific instance of probate-related grief through the lens of an HVAC technician assisting a man who recently lost his mother. This narrative illustrates continuing bonds theory , a psychological concept suggesting that the bereaved maintain ongoing relationships with the deceased rather than simply detaching from them. The son struggles to make permanent financial de...

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