4 🟡 Repair Required
Goodman Error Code 4: Open High Limit Switch
⚠️ Your Goodman HVAC system has detected an open high limit switch, which could lead to overheating and system damage. Turn off the system and call a professional for repair.
How to Fix Goodman Code 4
- Step 1: Turn off your HVAC system at the thermostat and the circuit breaker to prevent further operation.
- Step 2: Do not attempt to open or disassemble your HVAC unit. This error requires professional diagnosis and repair.
- Step 3: Contact a licensed HVAC technician to inspect and repair your system.
What Does Goodman Error Code 4 Mean?
The Goodman 4 error, also known as an open high limit switch, indicates that your HVAC system has detected an issue with its high limit switch. This switch is designed to monitor the temperature of your system's heat exchanger and prevent it from overheating. When the switch is open, it can't perform its function, leading to potential system damage. This error is typically caused by a faulty switch, but it could also be due to a wiring issue or a problem with the system's temperature sensor.
Common Causes of Goodman Code 4
- Faulty high limit switch
- Wiring issue related to the high limit switch
- Problem with the system's temperature sensor
Applicable Goodman Models
Need a Pro to Fix Goodman Code 4?
A licensed HVAC technician can diagnose and fix this issue quickly.
Find a Licensed Tech Near You →Replacement Parts for Goodman Furnace Code 4
High Limit Switch OEM: 4BH13-100