Why Won't My AC Turn On?
When the AC will not start at all, the problem is often electrical or thermostat related. A few safe checks can rule out the simplest causes.
Common Causes
- Tripped breaker or blown fuse.
- Dead thermostat batteries.
- Thermostat set incorrectly.
- Failed capacitor or contactor.
- Tripped float switch from a clogged drain line.
Safe Checks
Check the thermostat batteries and setting. Check the breaker for the indoor and outdoor units. Look for a tripped float switch near the indoor unit if there is water in the drain pan. See AC won't turn on.
When to Request Service
If the breaker trips again right after resetting, do not keep resetting it. That points to an electrical fault that needs professional diagnosis.
FAQs
Why won't my AC turn on?
Common causes include a tripped breaker, dead thermostat batteries, or a failed component like a capacitor.
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