This one needs a licensed pro
A breaker that keeps tripping: call an HVAC technician
A breaker that trips again after one reset is protecting you from an electrical fault. Leave it off.
Why this happens
Lennox says a breaker that trips again points to an overloaded circuit, and lists the capacitor, fan motor and compressor among the parts that can cause it. HVAC.com's advice when a breaker keeps tripping is not to try turning the system on again and to contact an HVAC technician. These are electrical repairs inside the unit.
What to do right now
- Leave the breaker in the off position.
- Set the thermostat to Off.
- Don't reset it again and don't replace a fuse with one of a different amperage. HVAC.com warns against substituting fuse sizes.
- Keep the outdoor unit's panels closed and stay away from its wiring.
What to tell the HVAC technician
- Which breaker trips and how quickly after the reset.
- Whether you heard a hum, click or buzz from the outdoor unit before it tripped.
- Whether it started after a storm, outage or other work on the house.
- The brand, model and serial from the outdoor unit's data plate.
Build the full list: what to tell the HVAC technician.
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References (every fact above comes from one of these pages)
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