Error 198 — Disconnected thermal fuse

What does 198 mean?

The thermal fuse within the indoor unit has been disconnected or has blown. This is a safety feature that cuts power if overheating occurs.

• Overheating event occurred
• Faulty thermal fuse
• Wiring issue related to the fuse

Click steps to track your progress.

1. 1

   Investigate the cause of the potential overheating.

2. 2

   Check the wiring associated with the thermal fuse.

3. 3

   The thermal fuse likely needs to be replaced by a qualified technician.

4. 4

   Do not bypass the thermal fuse, as it is a critical safety component.