Applicable Systems
Carrier ComfortLink Thermostat/Controller
Symptoms
High pressure switch open. The discharge pressure has triggered the high pressure safety switch.
Possible Causes
- Condenser airflow restricted or fan failure
- Refrigerant overcharge causing excessive pressure
Troubleshooting Steps
- Step 1: Check the condenser fan operation and airflow
Fan is not running or airflow is restricted - Step 2: Verify the refrigerant charge level
Charge level is above specification
How to Reset
To reset: Fix the airflow or charge issue, then reset the controller.
Comments (0)
Share your experience to help others facing the same problem.
Leave a Comment
Source: Carrier HVAC Troubleshooting Guide, Carrier Corporation
Category: HVAC Residential
No comments yet. Be the first to share your experience!