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William Cunningham's avatar

Air conditioning is very specifically incredibly regulated. Starting with the ozone crisis from Freon, the profession has required stringent licensing to obtain refill refrigerant, despite relatively cheap and easy to acquire tooling. Up until the middle of the Obama administration, it was easy to just buy a can of R410A (the modern refrigerant that doesn’t damage the environment), so for $100 in gauges and hoses and $100 in a can of refrigerant you could refill your own equipment. Subsequently that has become illegal to acquire without the professional licenses, though lots of places don’t check that stringently. This is standard over regulation, but it has some fun, dumb twists. 1) R410A was approved because it’s environmentally safe, was generally available, and then became generally unavailable by EPA regulation, reversing their previous ruling that allowed it to begin with. 2) cars use another refrigerant (R134A), which is largely unregulated, so it’s much more widely available. Meaningfully, it is no different from R410A, though I wouldn’t rush using the cans of recharge you can get at every auto parts and super market to fix my brand new central air unit.

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Doctor Hammer's avatar

Sorry to hear about the problem, and glad to hear about the resolution.

We had a similar problem with our AC about 5 years ago. Fortunately my wife has zero discomfort in negotiating with people and we had around 15 people come in to diagnose the problem. We received quotes from 24,000$ for a whole new heating and cooling system to 500$ to replace the fan and maybe a capacitor. Part of the issue was that it was an older system with the pre R410A refrigerant, so guys who couldn't fix big parts and just replaced them couldn't do just the outside unit.

During this time I spent a half dozen hours on youtube and found out how to replace the likely culprits in the system myself. ~250$ at Grainger and a few hours more I had the system working perfectly. To be fair, that probably was in line with the 500$ quote all told, though I switched out three parts instead of one or two.

Long story short, most "repairmen" are just salesmen for new equipment. A few are the real deal, in our experience mostly the guys whose family owns the business, Dave and Sons where the sons actually show up with Dave sort of deal. The larger lesson we have learned is that if you are pretty clever and careful, about 90% of home repair work can be done yourself with some research, and even if you screw up and do it twice you are likely to come out way ahead of hiring contractors. At this point I have replaced every appliance in a house except for the heat exchanger/furnace myself, and it isn't that bad if you don't mind learning how and buying the tools.

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