Why Is My Air Conditioner Not Turning On Despite Thermostat Set to Cool?
Most AC no-starts trace to power or safety shutoffs. Check the thermostat is set to Cool and replace its batteries. Verify the AC breaker is ON. Make sure the indoor furnace/air handler switch is ON. Empty the drain pan; a tripped float switch can stop the system. Replace a clogged filter. If it still won’t start, a failed capacitor or control issue needs a technician. We offer same-day emergency service in San Antonio. Residential service calls are $79.
- Quick checks: thermostat batteries; breaker; equipment switch; drain pan/float; air filter.
Updated: 2025-12-28 00:00:00
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"Called Eagle Heating in the morning and they were out there by noon." — Dan G.
Sources
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