Error 198 - Disconnected thermal fuse of indoor unit

What does 198 mean?

The thermal fuse in the indoor unit has become disconnected or has tripped, often due to overheating, acting as a safety measure.

• Overheating within the indoor unit
• Faulty thermal fuse
• Loose connection of the fuse

Click steps to track your progress.

1. 1

   Disconnect power to the indoor unit immediately.

2. 2

   Inspect the thermal fuse and its connections for any signs of detachment or damage.

3. 3

   Re-secure or replace the fuse as necessary; if it keeps tripping, professional inspection for overheating cause is needed.