What It Means
Compressor failed to start when energized by control board.
Bryant Heat Pump
Bryant Heat Pump Error Code 62
Troubleshooting guide for the Bryant Heat Pump system fault 62.
Possible Causes
- Low supply voltage during start attempt or pitted contactor.
- Open or shorted compressor windings.
- High-pressure lockout holding compressor off.
- Inverter drive fault or output failure.
Not sure which one it is — or if it's none of these? Try ACLogics today.
Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.
New to this code? Click to see why this happens
Full Diagnosis
Compressor No Start. The board detects a call for compressor operation but no run signal or current draw develops, so it stops attempting to start that compressor and locks out the outdoor unit's cooling or heating capacity until reset. Indoor blower and any electric or fossil-fuel backup heat continue to function normally since this fault is isolated to the compressor circuit. It differs from code 79 (compressor no-pump event), which occurs after the compressor has started and is drawing current but isn't moving refrigerant — 62 is an electrical/mechanical failure to start, while 79 is a refrigerant-circuit failure of a compressor that is technically running. Board retries after 15 minutes, giving time for thermal or pressure conditions that may have caused the no-start to normalize before the next attempt.
All Recorded Causes
Check supply voltage at the compressor terminals during a start attempt, not just at rest. Inspect compressor wiring and contactor operation, including contactor points for pitting or failure to close. Test compressor winding resistance (run, start, common) and compare to specification to rule out an open or shorted winding. Check for a high-pressure lockout condition holding the compressor off. Inspect the inverter drive for fault codes or output failure if this is an inverter-driven compressor. Board retries after 15 minutes; repeated no-start events point to a hard electrical or mechanical failure rather than a transient condition.
Verify Before Replacing Parts
- Confirm the exact Bryant model family and heat pumps context before acting on a generic code description.
- Confirm board LEDs, wiring polarity, and model compatibility before replacing control boards — this Bryant fault points at check supply voltage at the compressor terminals during a start attempt, not just at rest.
- Check for intermittent communication faults caused by connectors, moisture, or damaged harnesses, and rule out inspect compressor wiring and contactor operation, including contactor points for pitting….
- After the correction, run the system long enough to confirm the heat pumps fault does not return under normal load.
Still unsure about this fault?
ACLogics walks you through Bryant Heat Pump diagnostics step-by-step — so you confirm the cause before swapping parts.
