Log in

View Full Version : 2008 Yaris Fan runs with AC ON, but NOT when engine is hot (New Fan/Fuse/R2 installed


franciscohui112
05-10-2026, 08:11 PM
I need help with a specific cooling fan issue on my 2008 Yaris.

The Background:
My original radiator fan motor seized up, which caused the 30A fan fuse to blow. I have since:

Replaced the Fan Motor (New).

Replaced the 30A Fuse.

Replaced the Fan Relay No.2 (R2).

The Current Problem:

AC is ON: The cooling fan works perfectly. This tells me the motor, the main fuse, and the Relay No.1 are likely okay.

AC is OFF: Even when the engine gets very hot (temp light comes on), the fan will NOT spin.