Alert 353 — Electric Heat Stage 3 Problem

What does 353 mean?

A problem with the third stage of the air handler's electric heat has been detected. This could be due to the pilot relay contacts not closing or the relay coil not energizing.

• Possible heat section or stage 3 failure.
• Pilot relay contacts did not close.
• Relay coil in the electric heat section did not energize.

Click steps to track your progress.

1. 1

   The air handler will operate on the first stage of electric heat until the issue is resolved.

2. 2

   Check for issues with the electric heat section or stage 3.

3. 3

   Verify that the pilot relay contacts are closing and the relay coil is energizing.