Yesterday was National HVAC Service Tech Day.
A good moment to say the obvious: great technicians keep buildings running. But there is another point worth making. Most service businesses are not only short of talent because there are not enough good technicians. They are short of talent because too much of that talent is spent walking into jobs blind.
Carl and Sam came up together. Same apprenticeship. Same mentors. Fifteen years each on commercial kit. Either one of them can stand in a plant room, close their eyes, and tell you what is wrong from the sound of it.
By any measure that matters, they are the same technician.
Last Tuesday they worked the same hours, in the same city, on the same kind of equipment. One of them got home for dinner. The other was still on a roof at nine.
Here is the only thing that was different.
Carl’s first job came in as a line on a screen. “RTU down. Site too hot. Customer not happy.”
That was it. That was everything he knew. So he drove forty minutes guessing. It could have been the compressor, a contactor, low charge, the board, a failed sensor, a blocked coil, or one of the ten other things that only become obvious once the panel is open.
He had loaded the van with a bit of everything, because a bit of everything is all you can do when nobody tells you anything.
On the roof, he opened the unit and started where every reactive call starts: at the beginning. Gauges on. Readings down. Thinking. Forty minutes later, he had it. Refrigerant-side restriction. Likely expansion valve.
He did not have the right valve on the van. Nobody had told him he would need it. So he drove back to the supplier, then back to site, then fitted it. The customer had been hot for three days, and let him know about it for the first twenty minutes.
The job was fixed, but it had already cost the service business twice. Once in travel, supplier time, overtime, and a second visit’s worth of effort. Again in the other customers who were now waiting longer because Carl had spent half the day finding out what the system could have told him before he left.
By the time Carl was done, the afternoon was gone. He got three jobs finished. He got home at nine.
He is brilliant at his job. He spent most of the day being a detective instead.
Sam started the same morning by looking at her phone. Her first job was already named.
The discharge temperature on a rooftop unit had been drifting above its normal line for three days. Compressor behaviour, suction-side symptoms, runtime patterns, and the unit’s service history all pointed in the same direction: a refrigerant-side restriction. Likely expansion valve.
The system was not pretending to be certain. It was giving the team enough confidence to stage the most likely part before she left.
The part was already on her van. She had the unit’s history open before she left the depot: last three visits, part numbers, previous readings, and a photo the last technician had taken of an awkward bit of pipework.
She drove straight to it. She was not guessing. She was confirming. Ten minutes on the roof told her the data was right. She fitted the valve she already had.
One visit. Done.
The customer never called to complain, because the customer never knew there was anything to complain about. The unit was fixed before it failed.
Sam got six jobs finished. She got home for dinner. She is exactly as good as Carl. She just got to spend the day proving it.
The difference was not the technician. It was what the technician knew before they got out of the van.
Carl walked in blind, and was magnificent anyway. Sam walked in with context, and her skill went a great deal further.
We talk a lot in this industry about a shortage of good people. It is real. The good ones are getting older, and there are not enough coming up behind them. But look at Carl’s Tuesday again. The skill was never the bottleneck. The information was.
We keep trying to solve an information problem by hiring harder. We send our best people up ladders with a one-line work order and a van full of maybe, then act surprised when the day runs to nine.
The kit has been trying to tell us for years. A unit does not usually fail in an instant. It drifts. It runs a little hotter, pulls a little harder, cycles a little differently, takes longer to recover, or slips further from the performance profile it should be following.
That drift shows up in temperature, pressure, compressor behaviour, fan runtime, current draw, vibration, humidity, and the gap between expected and actual performance. The signal is there before the emergency call. Somebody just has to be listening to it.
And when somebody is, the work order stops being a line on a screen. It becomes a fault pattern, a service history, a likely cause, and the right part already on the van.
Protecting equipment is part of the value. But in a service business, the bigger unlock is protecting technician time.
Better information means better triage, better parts planning, fewer wasted visits, higher first-time-fix rates, fewer emergency calls, less overtime, and more jobs completed by the same team.
That matters because the technician shortage is not going away quickly. The answer cannot just be “hire more people” when the people are not there to hire. The companies that win will be the ones that stop wasting the people they already have.
We had a day this week to thank HVAC service technicians. Good. They have earned it.
But the best way to thank a great technician is not a free lunch once a year. It is to stop sending them in blind.
Give them the full picture before they climb the ladder and you do not get a different person. You get the same person, finally able to do the job they were always good at.
Carl and Sam are the same technician. Only one of them got to act like it.
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