Thermos - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

snavy · 11-29-2006, 01:54

Hey all,

I have an EL falcon and I think the Thermo closest to the air box is not working.

The temp gauge hits "O" on the Temp Guage.

I let the car idle for ages, only the Thermo closest to the overflow tank turns on.

I heard it could be a fuse or relay problem or the Termo is destroyed.

Where is the fuse and relays for the Termos?? Hopfully they are seperate if not one Thermo is knackered.

Thanks!

madmelon · 12-01-2006, 06:24

those thermos are designed to run in an interesting way.
low speed, two fans run in a series circuit. high speed, fans run in parallel. This means that when warm both fans should run no matter what. If one fan has failed then neither will run untill the overheat condition triggers parallel mode, then one will start. That mode is also triggered by air con.
Basically if there are fans running at the lower end of the normal temp scale then you shouldn't have any problems. Just have a look with the bonnet open. Yous should be able to hear them too.