33 / E33
Repeated high-temperature faults on outdoor control board; continued operation acceptable
This code typically points to
- Repeated brief high-temp events on control board during operation
- Marginal cooling of control board under load
- Ambient conditions stressing thermal envelope
Next checks to confirm
- Confirm ambient operating conditions are within range
- Check control-board cooling path (grease, screws, airflow)
- Check for refrigerant-side restrictions affecting board cooling
Escalation
Advisory — manual explicitly states continued operation is acceptable
Reset behavior
Clears after thermal stress event frequency drops back to normal.
Service Soon
Schedule repair