What does 23 mean?

The pressure switch, which monitors airflow, did not return to its 'open' state as expected. This may indicate an airflow restriction or a faulty switch.

• Blocked flue or vent pipe
• Faulty pressure switch
• Blower motor issue
• Condensate drain blockage

Click steps to track your progress.

1. 1

   Check the unit's exhaust vent for obstructions.

2. 2

   Inspect the condensate drain line for clogs.

3. 3

   Ensure the blower motor is operating at the correct speed.

4. 4

   Contact an HVAC technician to test the pressure switch.