Solid Red TRIP LED — Compressor not running despite thermostat demand

What does TRIP LED solid Red mean?

The thermostat is calling for cooling (Y signal is present), but the compressor is not running. This indicates a protection mechanism has engaged or there's a power issue to the compressor.

• Compressor protector has opened.
• Condensing unit power disconnect is open.
• Compressor circuit breaker or fuse is open.
• Broken supply wires or connector.
• Compressor power wires not routed through the Comfort Alert module.
• Compressor contactor has failed open.

Click steps to track your progress.

1. 1

   Turn off unit power supply and install a lockout tag.

2. 2

   Check if the thermostat demand signal (Y) is present.

3. 3

   Verify the compressor protector is closed.

4. 4

   Inspect the condensing unit power disconnect and circuit breaker/fuses.

5. 5

   Check for continuity in supply wires and connectors.

6. 6

   Ensure compressor contactor is functioning correctly.