V70-Climate control fan continues to operate

jsturt · Post by **jsturt** » 09 May 2012, 12:30

2004 V70 w/ 145K miles. The climate control fan continues to operate with the ignition turned off. The only way to stop the fan is to pull the fuse momentarially. In additiion, when the vehicle is operating, there is no control of the fan speed using the variable position fan switch. The AC works fine. I'm thinking that there may be a relay problem, but that does not explain the fan speed switch not functioning.

Any thoughts or suggestions would be appreciated.

Post by **jimmy57** » 09 May 2012, 14:16

There is a transistor fan control device called the power unit under and next to blower motor.
That would be my first suspicion.
There is no relay.

jsturt · Post by **jsturt** » 09 May 2012, 17:01

Thanks! Do you know if the fan control unit can be accessed without removing the fan assembly?

Post by **DGM** » 09 May 2012, 18:28

jsturt wrote:Thanks! Do you know if the fan control unit can be accessed without removing the fan assembly?

The module is part of the blower assembly. Both have to come out.

https://www.matthewsvolvosite.com/forums ... =9&t=21343