CENTRAL AIR CONDITIONING (Dedicated to Rose
)
Is there anything worse in your life than when your AC craps out in the middle of summer? Perhaps, but not many. Here’s something you can do that could spare you several days of living in hell and save you big bucks at the same time. AC techs are busy in the summer and when you finally get a hold of one it will be days and big $$ to get him out.
The most common problem for ACs suddenly shutting down is capacitor failure. What is an AC capacitor? In a nutshell it is a soda can sized canister that stores high amounts of power in order to start the major components in your AC (fan and compressor). When the capacitor fails your AC is down. I’m taking a guess here but I’m willing to bet more than half of sudden AC failures is due to blown capacitors.
So what to do? Start by keeping a spare capacitor on hand. Why? Because then when your capacitor goes out (and it will go out before the rest of your AC goes out) you don’t have to take days chasing down a replacement and you can get it up and running quickly. A capacitor costs only about $15 and would be the best $15 you spent if it is 90 degrees outside and you’re dying inside. Check your manual for capacitor specs or take a picture of the label on the capacitor to get the specs. You can order them on Amazon. Or write me with the label photo and I’ll link you to the right one.
Is it hard to change out an AC capacitor? ABSOLUTELY NOT!! It’s actually quite simple and doesn’t take an HVAC Tech or electrician to do it. BTW, a tech will cost you between $250 and $300 to change out a capacitor. However, there are two very important safety precautions you
MUST take. If you are unwilling to do these precautions because you think they are unimportant then don't bother fixing your AC. You're nothing but an accident looking for a place to happen. Call the man.
- Turn off the power to the unit.
- Discharge the capacitor after you have disconnected the power and before you touch the capacitor.
I wont get into the details of how to replace your capacitor. Instead, I will link you to a video which explains it better than I can here. The first 13-14 minutes is all you need to watch. As for diagnosing if your capacitor is shot, usually a visual inspection is all you need. A normally functioning capacitor has a totally flat top on it. When it fails, the top will be domed, bulging, disfigured, charred, or just flat out exploded. Even a slight bulge indicates your capacitor is shot. If that capacitor top is not clean and totally flat then it is highly likely shot. No need for a multimeter.