Yellow ALERT LED 8 flashes — Welded contactor

What does ALERT LED 8 flashes Yellow mean?

The compressor contactor has failed in the closed position, meaning the compressor will always run when power is supplied, regardless of the thermostat demand.

• Compressor contactor has failed closed.
• Thermostat demand signal is not properly connected to the module.

Click steps to track your progress.

1. 1

   Turn off unit power supply and install a lockout tag.

2. 2

   Inspect the compressor contactor to see if it is stuck closed.

3. 3

   Verify the thermostat demand signal (Y) is correctly connected to the module.

4. 4

   Check that the 24VAC is present across Y and C when the thermostat demands operation.