April 27, 2017
It’s frustrating when your A/C won’t turn on, especially when it’s hot and you need cool air the most.
We feel your frustration. But here’s some good news: we’ve helped many homeowners fix an A/C that won’t turn on, so we know what’s causing the problem.
Here are 4 common problems that keep your A/C from turning on:
In this article, we’ll discuss each of these common AC problems and share DIY repairs you can try before calling a professional for AC repair.
If your filter looks like the one on the right, it’s time to replace it.
Dirty air filters block air from returning to the air conditioner, which causes pressure to drop and ice to form on the evaporator coil.
When this happens, a low-pressure switch trips and shuts down your A/C’s compressor (the heart of your system) to protect your system from further damage.
DIY solution: Check your air filter and change it if it’s dirty. In the heat of the summer, when you’re putting a lot of demand on your A/C, consider changing your filter once every month.
Your thermostat is the brain of your cooling system. If it’s set to the wrong setting, or it’s low on batteries, your A/C won’t turn on.
DIY solution: Try these 2 steps:
Make sure your thermostat is set to “cool” and not “heat” (it won’t turn on if it’s set to heat)
Replace your thermostat’s batteries
If you’ve tried those 2 steps and your A/C still isn’t on, contact a professional.
Circuit breakers on an electrical panel.
Your air conditioner requires electricity, so if your circuit breaker is tripped or broken, then your A/C won’t power on.
DIY solution: Find your electrical panel (see image above) and look for tripped breakers. Turn them “off” and then “on” again. If the breaker trips again immediately or after a few minutes, don’t reset the breaker; call a technician for help. You most likely have a short or grounded circuit which a professional will need to fix.
An outside condensate drain line.
Your condensate drain line carries the condensation that forms inside your A/C outside your home. If the drain line is clogged, water will start to overflow, and your drain float switch will shut down your A/C.
If that didn’t fix the problem, there may be other issues causing your A/C to break down...
If you tried those DIY repairs and your A/C still isn’t turning on, the problem may be something a professional need to fix. These types of problems include:
Related article: Why Is Ice Building on My A/C Unit's Pipes?
For your convenience, you can request an appointment in one of two ways: