Bryant
Cooling Call Not Reaching Outdoor Unit
Thermostat calls for cooling (display indicates COOL ON) but outdoor unit does not start.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Open Y circuit between indoor control board and outdoor unit, Tripped outdoor unit breaker or disconnect, Failed contactor coil in Bryant outdoor unit, Blown low-voltage fuse on indoor control board due to short
How to Fix / Troubleshooting
Safety first: Turn off power to both indoor and outdoor units at breakers and outdoor disconnect before opening panels.
Steps to troubleshoot:
- 1. Verify outdoor power: Ensure the outdoor unit breaker is ON and the disconnect is inserted. Reset if tripped.
- 2. Inspect low-voltage wiring: At the outdoor unit, check that the Y and C wires from the indoor unit are securely connected to the contactor coil or control board.
- 3. Check indoor fuse: Inspect the indoor control board’s low-voltage fuse and replace if blown, after correcting any shorts in the thermostat or outdoor wiring.
- 4. Technician testing: A technician should test for 24V across Y and C at the outdoor unit when cooling is called. If 24V is present but the unit does not start, the contactor or control board may be faulty.
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Repair Difficulty
Hard
4/5
Required Part
Bryant Outdoor Unit Contactor
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