Hi wizards.

My radiator fan is running all the time and runs after the engine is off. Also the cabin heating has stopped working.

I changed the thermostat but it has made no difference.

Any ideas?

 

Car details? See my sig

 

Sorry.....I thought it was in there.

It's a 99 V6 S Type.

 

I think it's happened before to members, but when using Search take less note of 2003+ cars as they have a lot of different electrics. You might try reading temperature-related engine sensors using OBD. ECT especially. But first check out relays - swap for known good one(s). See your handbook / the Electrical Guide in JTIS (free on here).

 

When installing the new thermostat - is the check ball at the 12 o'clock position?

Did you purge air from the cooling system?

Typically, when the fan runs after the engine is turned off - that is an indicator the coolant temp is too hot.

Additionally, check power to the aux coolant pump. (I have the 4.0 V8) not sure if you have one with the 3.0 V6 but check anyway...

Odds could be you need a new DCCV or you have a blockage somewhere in the cooling system if the above checks out good.

 

I'm pretty sure only the 4.x have that pump.

 

Thank you chaps.

It sounds complicated. Maybe it's time for the scrap yard. Shame as it's only done 50000 miles. :-(

 

I don't see why it has to be scrapped. Just fix it!

 

+1 fix er up!