You don't need to call an HVAC technician every time your thermostat acts up. I learned this the hard way—$400 hard. Back in 2022, my McQuay HVAC system started blowing cold air in the middle of winter. I panicked, called a tech, and he simply reset the thermostat. Four hundred dollars for a five-minute fix. That day, I decided to educate myself on basic HVAC troubleshooting. Here's what I wish I'd known.
I'm a facilities manager handling HVAC orders for 8 years. I've personally made a few expensive mistakes, totaling roughly $2,000 in wasted budget. Now I maintain our team's checklist to prevent others from repeating my errors. This isn't about being cheap; it's about being informed. An informed customer asks better questions and makes faster decisions.
Argument 1: How to Reset a Thermostat (It's Not Rocket Science)
Let's start with the how to reset thermostat process. Most thermostats have a reset button, but it's often hidden. On my McQuay unit, it was a tiny pinhole on the side. I didn't know that. The tech pressed it with a paperclip (yes, a paperclip) and the system rebooted. I could've done that.
Here's the general drill: turn off power to the HVAC system at the breaker (safety first), then remove the thermostat from its base. Look for a reset button or a small hole labeled "reset." Press and hold for 5-10 seconds. Reattach, restore power, and see if it works. If not, check the batteries (duh) and the circuit breaker. That's it. Simple.
Why did I pay $400? Because I didn't know. Now I keep a paperclip taped inside my thermostat's manual. (Thankfully, I've only needed it once since.)
Argument 2: Garage Heaters and Electric Heaters—Choose Wisely
If you're shopping for a garage heater or an electric heater, the options can be overwhelming. I went back and forth between a propane garage heater and an electric one for two weeks. Propane offered faster heat; electric was cheaper to install. Ultimately, I chose electric because I didn't want to deal with fuel storage. But your situation might be different. This worked for me, but I have a well-insulated garage. If you're heating a drafty workshop, the calculus might change.
Key specs to check: BTU output, voltage requirements, and clearance. For electric heaters, make sure your panel can handle the amperage. I almost bought a 240V heater for a 120V circuit—that would've been a $500 mistake. Dodged a bullet when I double-checked with an electrician friend. (Ugh, I hate electrical work.)
For McQuay HVAC systems, the same principle applies: understand your equipment's specs before you buy add-ons or replacements. The manual is your friend.
Argument 3: "McQuay COP Arrest" and Other Scary Error Codes
You might have searched for McQuay COP arrest after seeing an error on your chiller or heat pump. I did too, once. COP stands for Coefficient of Performance—a measure of efficiency. "Arrest" usually indicates the system has shut down due to a fault. It's not a death sentence. In my case, it was a dirty filter causing high pressure. Cleaning it fixed the issue.
But here's the thing: I'm not a technician. If you see persistent errors, call a pro. However, basic maintenance like changing filters, cleaning coils, and checking for obstructions can prevent many "arrests." I've made it a habit to check my McQuay HVAC filters monthly. Takes five minutes. Saves hundreds.
Don't let error codes scare you into expensive service calls without doing a little homework first. Your owner's manual and a quick online search (with reliable sources) can save you time and money.
But Isn't DIY Risky?
I can already hear the objection: "What if I break something?" Fair. I'm not suggesting you rewire your compressor or bypass safety switches. That's dangerous and illegal in many places. But resetting a thermostat? Checking a filter? Reading an error code? Those are safe, basic tasks. If you're unsure, call a professional. There's no shame in that.
The goal isn't to replace technicians; it's to be an educated consumer. Know when to DIY and when to call in the cavalry. That's the sweet spot.
The Bottom Line
I wasted $400 because I didn't know how to reset my thermostat. Don't make my mistake. Take 10 minutes to read your manual, learn the basics, and understand your McQuay HVAC system. An informed customer is a better customer—and a richer one. So next time your thermostat goes blank or your garage heater won't start, take a breath. You might just fix it yourself.
