Thermo Booster Not Switching On

[mr 32]

I've had a feeling that thermo booster hasn't been kicking in traffic.

I did the short as the workshop manual advises, with no result.

With a multi meter I tested the thermo switch end it had 10.33v

thermo end of the plug shows no voltage.

What shoul I be checking next?

Cheers norm

[lachlanw]

well is your car overheating or what? . turn the air con and the fan should go eventually

[mr 32]

well is your car overheating or what? . turn the air con and the fan should go eventually

no but the increase in temp is alarming. I bypassed that switch to test it, anyway r32 thermo are rad temp based for the thermo not a/c. I have already checked the clutch fan no problems there.

[Godzilla32]

Power up the fan manually from battery power with some wire and see if it runs. Good place to start..

[blind_elk]

If there is an increase in temp, then there is overheating. How hot is the engine getting when you have A/C working?

What happens when you supply power directly to the fan?

[mr 32]

Power up the fan manually from battery power with some wire and see if it runs. Good place to start..

ill test that next but i doubt its the fan, since with the switch bypassed the fan plug end is not howing any voltage

If there is an increase in temp, then there is overheating. How hot is the engine getting when you have A/C working?

What happens when you supply power directly to the fan?

i havent run the ac while driving since it hasnt been regased yet.

i have tested the the fuse plugs with a multi and the trigger switch shorted and that isnt showing voltage

[blind_elk]

The fan only works when the A/C is on, and the engine starts to overheat. If you aren't running A/C, then the fan isn't going to work.

[mr 32]

The fan only works when the A/C is on, and the engine starts to overheat. If you aren't running A/C, then the fan isn't going to work.

thanks

ive booked in a regas so i can test it

[noone]

The fan only works when the A/C is on, and the engine starts to overheat. If you aren't running A/C, then the fan isn't going to work.

Thought that the fan was triggered solely by the temp switch in the radiator,

cubes as a diy to put a diode in to trigger it with the a/c

[noone]

Have wired mine back to the way its sposed to be an can now confirm it is driven by the temp. switch

Still have no A/c at this point so can only assume, an look at the wiring diagram, the A/C has nothing to do with the overheat fan!

[WHITE R32]

thats correct its just an aditional engine overheat fan triggered by the sensor in the bottom of the radiator on the drivers side

only comes on in extreme conditions

[noone]

Mine comes on at 90 degrees not that extreme really

especially if ya are running the A/C at idle