The Diagnosis Game (and Why Van Sleeping Bothers Me)

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The Sleeper 

The year was 2002 and I was 20 years old. I had a helper named Clay and he was a really nice guy, probably 15 years my senior, already with streaks of grey in his hair with a way of making you feel at ease… so very at ease.

OK, he was sleeping most of the time…

He fell asleep in my van between most calls and even fell asleep in company meeting leaning against a condenser box.

Now maybe I’m just being judgmental and Clay was a narcoleptic, or maybe he was staying up all night doing superhero work, but I think the guy just liked to grab a few , or MANY winks.

It didn’t really bother me much when Clay would sleep, I could tell he wasn’t learning much and didn’t care much, but he was a pleasant sort of bloke and I didn’t hire or manage him so it really wasn’t my problem.

Nowadays I do employ and train lots of people and now it is my problem and trainees who sleep in vans DRIVE ME CRAZY! Instead of focusing on my evil capitalist anti-sleep, judgy ways right off let’s ease into with some more trainee tales and let’s see if you can catch a thread of commonality.

The Nasty Dudes 

When I was a helper I rode with a few old techs that took it as their life mission to teach me all about every possible nasty thing they could pump into my mind. I started in the trade at 17, home-schooled, wide eyed and as sheltered a Christian kid as you can get (almost). These guys started in using words and pushing mental images I didn’t even understand at first.

Once I got into my own van I was glad to have a break from it… until I started getting trainees. I had three guys that rode with me that I remember in particular who ONLY wanted to talk about what they did, saw or thought about last night. One of them used to be a “tech” (used loosely) in Miami and if I took him at his word he slept with 120% of the of the occupants of South Florida. Needless to say, the fantasy game is strong with most of these guys and I didn’t take a word they said seriously.

Does it shock you that none of them worked out as techs?

The Phone Lookers 

I’m thankful that I started in the trade during a time of radio dispatch before cell phones were popular and even before Nextel chatter became a thing (remember Nextel). Back then our favorite entertainment was listening to little dispatch dramas and techs helping one-another with diagnosis.

Nowadays many helpers / trainees / apprentices and techs alike turn to their phones for entertainment between calls. If you have had a young person working with you who was on there phone all the time how did that work out for them?

The Random Guesser 

I once rode with a guy who would guess what the next problem would be before we got there.

“This one is gonna be a coil leak” he would state confidently 

This was before detailed, web based job histories were a thing so it was really just a total guess based on the type of equipment common in a particular community.

He actually wasn’t a bad tech and this was just his way of entertaining himself, but his method of pre-diagnostic guessing was all based on the dreaded “I’ve seen that before” rather than a solid diagnostic approach based on observation and measurement.

The common thread? All of these techs were busy engaging (or disengaging) their minds in lot of things that weren’t making them better at their jobs.

The Diagnosis Game 

There were a few techs that really taught me and this teaching often happened on the drives between calls and it came in four flavors

  1. Discussing what and why we did what we did at the last call
  2. Explaining technical concepts and practices I was struggling with
  3. Talking through strange diagnostic issues they had experienced in the past
  4. The Diagnosis game

Different people do the diagnosis game differently and probably also call it different things (some of you may not be comfortable with “games” at work) but it has some common elements and is designed to challenge the helper to think and imagine their way through a diagnostic scenario.

Here is how I do it –

Me: Ok, I’ve got one 

Trainee: You’ve got one what? 

Me: I’ve got a diagnosis for you 

Trainee: OK, what is it? 

Me: I’m a service call so you can ask me questions as the customers or choose to check various things and ask me the findings until you make a diagnosis

Trainee: OK so what’s the suction pressure 

Me: Is that how you start a service call? Come to screeching halt in front of the home, hop out and check suction pressure? 

Trainee: No…

Me: Ok, so what do you do first?

Trainee: Check the thermostat I guess

Me: So you come to a screeching halt, jump out, slam open the customers door and start checking their thermostat?

Trainee: (rolling eyes) No… I guess I talk to the customer 

And I just keep going and going and going like this, picking on every detail of the call and diagnosis process they use, detail by detail until they gather enough information to make a diagnosis.

Along the way they will inevitably say something like –

Trainee: Is it a bad capacitor?

Me: Can you ask an air conditioner questions? 

Trainee: No 

Me: I only answer yes or no questions about observable facts, provide you tool readings or answer questions as the homeowner 

Trainee: OK, does the contactor have power? 

Me: What does that mean?

Trainee: Is there power going into the contactor? 

Me: What is power? 

Trainee: Is there VOLTAGE at the CONTACTOR! 

Me: Where at the contactor? 

Trainee: The HIGH VOLTAGE! 

Me: Measured with what? 

Trainee: MY METER! 

Me: What setting on your meter? 

Trainee: VOLTAGE! 

Me: OK, Where are the leads placed

Trainee: Across the bottom of the contactor I guess? 

Me: Don’t guess, what is the bottom side called

Some of you are reading this and getting annoyed thinking I’m a pedantic nerd who just like to antagonize helpers (which is somewhat true I will admit). Some guys hate this at first, but they usually come to enjoy it EVENTUALLY and it teaches imagination, reasoning and precise language.

Along the way you can throw in little scenarios where they die or get injured because they forget to double check their meter to a known power supply or fail to wear PPE etc…

Yes, it’s a little dramatic but the human brain is hardwired for story and competition and the diagnosis game used both of these human traits to help teach HVAC/R. It is better than classroom training because they get to apply and test what they are learning as they are thinking about it, it works best if they actually think you are wrong on something and have to come up with proofs or experiments to try and prove you wrong.


So I posted on social media a few weeks ago about how I don’t like it when trainees sleep in the vans and I got pretty well roasted for being a judgmental sleep hater and after all “what do I expect trainees to do while riding along?”

I expect nothing

One of my political heroes (who will remain unnamed) was once asked how he kept his sanity working in DC with so much corruption and lunacy, he responded

It’s Simple, I’ve just learned to have low expectations  

While I fully expect trainees to fall asleep, look at their phones, guess at diagnosis, fail to read manuals and share inflated escapade stories my STANDARD is that they will actually engage their brains and learn about HVAC/R (and hopefully some life lessons) when they work with me. This is a process and the diagnosis game is one of my favorite tools to get them there.

I firmly believe that anyone who really wants to learn this trade can become usefully proficient much faster than most think possible if they just spend their work day engaged rather than relying on osmosis to fill their brains with experience.

Many of us learned this business because we really had no choice but to make it work and necessity forced us to turn on our minds and make it happen. Some of the people who train with you may not have those pressures and may not have influences in their lives that require then to be on the ball.

You don’t need to be a jerk to hold new people to a high standard, I would suggest step one is to have low expectations and step two is start requiring more of their attention during drives investing in them and bringing them up to your standard.

And trainees… Don’t sleep in the van or stare mindlessly at your phone. Trust me.

— Bryan

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