AC won’t turn on?
Let’s troubleshoot safely.
What’s your thermostat set to?
FAQs
▶Is it safe to reset the breaker?
Yes, you can reset it once. If it trips again, stop and call—repeated trips can indicate an electrical problem.
▶What’s the most common reason an AC won’t start?
Thermostat settings, tripped breakers, a clogged drain safety switch, or an outdoor capacitor/contactor issue are common.
▶Should I keep trying to start it?
If it won’t start after basic checks, avoid repeatedly cycling it. Call for service to prevent damage.
▶If the fan runs but there’s no cooling, is that the same issue?
Not necessarily—this guide is for “won’t turn on.” If it runs but isn’t cooling, use the “AC Not Cooling” guide.
▶When should I call immediately?
If you smell electrical burning, see smoke, or breakers keep tripping—turn it off and call.