Hardware Error — Internal communication issue

What does Cyan LED blinking mean?

A blinking cyan light on the System Status LED indicates an internal communication error within the system's hardware.

• Internal communication error

Click steps to track your progress.

1. 1

   Power cycle the Lennox system by turning off the power at the breaker for 30 seconds, then turning it back on.

2. 2

   Check all physical connections between system components.

3. 3

   If the error persists, contact a qualified Lennox installer or service technician.