Error 153 - Floating switch of indoor unit (2nd detection)

What does 153 mean?

The floating switch in the indoor unit, typically used for condensate overflow detection, has activated. This is a persistent issue (second detection).

• Clogged condensate drain line
• Faulty float switch
• Condensate pump failure (if applicable)

Click steps to track your progress.

1. 1

   Check the condensate drain pan for any signs of water overflow.

2. 2

   Clear any blockages in the condensate drain line, ensuring water can flow freely.

3. 3

   If the drain is clear and the error persists, the float switch itself may be faulty and require professional inspection.