Shows / The Human Diagnostic
The Human Diagnostic
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…
Episodes
- The Human Diagnostic
Why You Can’t Stop Fixing Everyone
I have spent forty-five years in other people's houses fixing things that were not my problem. Not the air conditioner. The air conditioner is my problem. That…
- The Human Diagnostic
When a Master Tradesman Can't Afford Parts
I pulled up to the house on a Tuesday afternoon in August. Modest ranch, neat yard, older pickup in the drive with a toolbox in the bed that had seen some…
- The Human Diagnostic
Why more information makes choosing harder
I sat at a kitchen table in Kingfisher last August across from a woman with four binders. Four. Not one. Four. Each binder had tabs. Each tab had printouts…
- The Human Diagnostic
Why she chose a $600 AC repair
The call was a heat pump not cooling right. Duplex on the north side of town, the half she owned, the other half rented out for twenty years. I'd serviced the…
- The Human Diagnostic
Your Unfinished Projects Are Not Failures
Got called out on a furnace diagnostic in late March. House about fifteen minutes west of Kingfisher, out where the section lines still mean something. Before…
- The Human Diagnostic
Shrink decisions to stop analysis paralysis
I went out on a service call a while back that I didn't end up selling anything on. I want to talk about why. The house was a newer build on the south side of…
- The Human Diagnostic
A 33 Year Furnace Binder Against Chaos
Ran a service call in late March. Retired guy, maybe seventy, lives south of Kingfisher off 81. Furnace acting up, cycling short. He met me in the driveway…
- The Human Diagnostic
Why we forget names but remember facts
There's a woman on the north side of Kingfisher I've been out to see six times in the last two years. Sharp as a tack. And she can't remember my name. Every…
- The Human Diagnostic
Stop living in your shadow house
Got a call last fall out on a section line road west of Kingfisher. Replacement quote on a twenty-year-old split system. Nothing unusual about the equipment…
- The Human Diagnostic
Why We Normalize Slow Decline
Format: Post-call Runtime: ~8 minutes Source: Psychology , minimization as coping style; Lazarus and Folkman stress and coping theory (1984) There's a certain…
- The Human Diagnostic
When a thank you looks like silence
Format: Post-call Runtime: ~8 minutes Source: Psychology , alexithymia (Sifneos, 1973); emotional literacy and interoceptive awareness; stoicism as emotional…
- The Human Diagnostic
How shame freezes your air conditioner
Format: Post-call Runtime: ~8 minutes Source: Psychology , shame versus guilt (June Price Tangney, George Mason; Brené Brown, Houston); self-concealment theory…
- The Human Diagnostic
Why Understanding Is Not Permission
Format: Post-call Runtime: ~8 minutes Source: Psychology , dependent decision-making, external locus of control (Rotter, 1954); approval-seeking behavior This…
- The Human Diagnostic
The HVAC Customer and the Ruler
Format: Post-call Runtime: ~8 minutes Source: Psychology , perfectionism research (Hewitt & Flett, 1991); perfectionism as fear of judgment, not love of…
- The Human Diagnostic
Why anxious people flood the silence
Format: Post-call Runtime: ~8 minutes Source: Psychology , verbal flooding as anxiety regulation; social anxiety expressed through speech (Clark & Wells, 1995)…
- The Human Diagnostic
Winning Trust When Words Trigger Suspicion
Format: Pre-call and post-call Runtime: ~8 minutes Source: Psychology , classical conditioning, hypervigilance, confirmation bias; Robert Cialdini's research…
- The Human Diagnostic
Fixing the HVAC and the Owner's Ego
Format: Pre-call Runtime: ~8 minutes Source: Psychology , competence identity, ego threat, Carol Dweck's fixed vs. growth mindset research (Stanford, 2006)…
- The Human Diagnostic
Why a broken AC feels like grief
Format: Post-call Runtime: ~8 minutes Source: Bereavement psychology , Bowlby attachment theory; grief and executive function impairment (Parkes, 1972; Stroebe…
- The Human Diagnostic
Why we ignore problems until they break
Format: Post-call Runtime: ~8 minutes Source: Psychology , ostrich effect (Galai & Sade, 2006); avoidance coping; information aversion This call was longer…
- The Human Diagnostic
Hand Them the Gauge
Format: Post-call Runtime: ~8 minutes Source: Clinical psychology , control as anxiety management; Ellen Langer's perceived control research (Harvard, 1975)…
- The Human Diagnostic
Why some people apologize for existing
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…
- The Human Diagnostic
How to escape the sunk cost trap
Format: Pre-call and post-call Runtime: ~8 minutes Source: Behavioral economics , sunk cost fallacy, loss aversion (Kahneman and Tversky) Before I tell you…
- The Human Diagnostic
Memory Lessons From an HVAC Technician
Format: Post-call Runtime: ~8 minutes Source: Psychology Is Simplified , "Psychology of People Who Forget Names Easily" Long day. Five calls. I'm thinking…
- The Human Diagnostic
Why logic fails the overthinking brain
Format: Post-call (and post-evening, post-next-morning) Runtime: ~8 minutes Source: Psychology Is Simplified , "Psychology of Overthinkers" This one takes more…
- The Human Diagnostic
The brain science of a curious repair
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…
- The Human Diagnostic
The Hidden Burden of Noticing Everything
Format: Post-call Runtime: ~8 minutes Source: Psychology Is Simplified , "Psychology of People Who Are Psychologically Over-Aware" Headed back in. Late…
- The Human Diagnostic
Reading human trauma in an Oklahoma driveway
Format: Post-call Runtime: ~8 minutes Source: Psychology Is Simplified , "Psychology of People Who Go Quiet When They're Hurt" Heading back toward town…
- The Human Diagnostic
The HVAC Technician and Maladaptive Daydreaming
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…
- The Human Diagnostic
Hearing the AC Fault Before the Gauges
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 Human Diagnostic
The Biology of the Blank Stare
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…
- The Human Diagnostic
The Five Star Review Dave Hartzell Forgot
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…
- The Human Diagnostic
The HVAC Call That Became The Reason
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…
- The Human Diagnostic
The One Who Wanted the Data
"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…
- The Human Diagnostic
Just Got Back on Their Feet
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…
- The Human Diagnostic
The Art of the Graceful Departure
This source explores the psychological complexity of ending a service call with a lonely customer who uses stalling tactics to avoid saying goodbye…
- The Human Diagnostic
Triangulation and the Invisible Ledger of Family Systems
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…
- The Human Diagnostic
The Anchor of Experience: Fluid and Crystallized Intelligence
The provided text explores the psychological distinction between fluid and crystallized intelligence through the personal narrative of an HVAC technician…
- The Human Diagnostic
The High Cost of Honesty: The One Who Overpaid
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…
- The Human Diagnostic
The Human Diagnostic: Competence, Fatigue, and the Empathic Cost
This narrative explores the psychological concept of compassion fatigue through the lens of a veteran HVAC technician reflecting on a challenging work week…
- The Human Diagnostic
The Wrong Person: Transference and the Professional Template
This text explores the psychological concepts of transference and countertransference through the real-world lens of a veteran HVAC technician's customer…
- The Human Diagnostic
House People: Maintenance, Grief, and Continuing Bonds
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…
- The Human Diagnostic
The Cognitive Load of Managing More Than a System
This account describes an HVAC technician's encounter with a customer whose physical illness significantly depleted her cognitive energy and decision-making…
- The Human Diagnostic
The Right Shape: Navigating Social Hunger in Service Relationships
The provided text explores the complex boundaries between professional service and personal connection through the story of an HVAC technician and a lonely…
- The Human Diagnostic
Demonstrated Competence: The Human Diagnostic of Earned Trust
This narrative explores how demonstrated competence serves as the foundation for genuine trust in professional service. By detailing an HVAC technician's…
- The Human Diagnostic
Editing the House Biography
The provided text explores the psychological concept of place identity, illustrating how a person’s sense of self becomes inextricably linked to their…
- The Human Diagnostic
The Mechanics of Leaving: Repairing a House Already Sold
This account explores the psychological concept of place attachment through the lens of an HVAC technician performing repairs for a homeowner preparing to…
- The Human Diagnostic
Transaction Utility and the Art of Haggling
This source explores the psychological concept of transaction utility through the professional experience of a seasoned HVAC technician. It argues that for…
- The Human Diagnostic
Offering Ordinary as a Form of Care
This narrative focuses on an HVAC technician’s encounter with a distressed customer and the psychological principles that guided his respectful response…
- The Human Diagnostic
The Architecture of Unspoken Gratitude
The provided text chronicles an HVAC technician’s evolving perspective on a client who lacks conventional social warmth, eventually identifying this behavior…
- The Human Diagnostic
The Calibration of Fine
This podcast episode explores the psychological concept of cognitive appraisal through the lens of a veteran HVAC technician's interaction with a customer…
- The Human Diagnostic
Managing the Anxiety of Verbal Flooding
In this transcript, an experienced HVAC technician reflects on a service call characterized by a customer’s continuous, non-stop talking. Drawing on…
- The Human Diagnostic
Navigating External Locus of Control
This narrative and psychological analysis examine a specific customer behavior where individuals require external validation before finalizing a choice…
- The Human Diagnostic
The Filter of Shame: Navigating Identity and Repairs
The provided text explores a specific HVAC service encounter to illustrate the psychological distinction between shame and guilt. Through the story of a…
- The Human Diagnostic
The Ruler and the Shield
The provided text explores the psychological motivations behind perfectionism through the lens of a professional HVAC installation. It highlights the research…
- The Human Diagnostic
Competence, Identity, and the DIY Ego
This narrative explores the intersection of technical repair and behavioral psychology through the lens of a veteran HVAC technician. Centered on Carol Dweck’s…
- The Human Diagnostic
Restoration and the Solo Decision
This narrative follows a veteran HVAC technician who assists a recently widowed client, illustrating how grief complicates practical decision-making. Grounded…
- The Human Diagnostic
Restoring Trust After Deception
The provided text explores the psychological dynamics of trust between a service professional and a customer who has previously been deceived. Drawing on…
- The Human Diagnostic
The Ostrich Effect and the Cost of Waiting
This text examines the ostrich effect, a psychological phenomenon where individuals avoid negative information to delay facing an unpleasant reality. Using the…
- The Human Diagnostic
The Illusion of Control
The provided text explores a case study in clinical psychology within the context of a residential HVAC repair, focusing on how perceived control manages…
- The Human Diagnostic
Re-Entry Points and Inner Worlds
The provided text describes a specific encounter between an HVAC technician and a customer experiencing maladaptive daydreaming, a psychological state…