Hign Speed fan ???

[11gothevt11]

Hi there
I was reading a post on here about low and hign speed Thermo fans
I am not sure if my hign speed thermo fan is working
All i know when i turn air con on the thermo turn on .
When air con on, are thermo only on low speed?
Please if anyone can tell me if i need to check relays and where exzactly do i find them??
Thankyou

[bnghardy]

yes I have a similar problem low speed fan comes on when the air is on thats o/k. I've sat there with motor running and only the low speed fan comes on with air off. is this normal?
so when does the high speed fan supposed to come on.( I have never seen it working or hear it come on) same as post.

[WATTO123]

same here, ive only ever seen one fan go on mine

[bnghardy]

so can any body ease our minds on this little problem.
cheers Brian

[11gothevt11]

yes I have a similar problem low speed fan comes on when the air is on thats o/k. I've sat there with motor running and only the low speed fan comes on with air off. is this normal?
so when does the high speed fan supposed to come on.( I have never seen it working or hear it come on) same as post.

Hign speed fan is meant to come on at 110 Degrees or something

[jay_wr8]

just a thort but i would imagine the high speed fan would not come on till temp gauge reaches 3/4 or so

[PRAVX II S]

These are the only time the high fan speed comes on.

When the motor temp gets to 110 deg.

When the coolant temp sensor goes faulty.

Or for some reason when using the air con the low fan speed does not come on the high fan speed take over.

If you want to test the high fan speed take the plug of the coolant temp sensor the PCM will think that the coolant temp sensor is faulty. And will turn the high fan speed on.

The low fan speed is normal when you use the air-con.

There are plenty of right up on this topic on the forum.