a question for you hoping you all might run outside & check!

on a TT auto while engine is running & you press the wind screen demist button can you hear a click from the idle valve? if your listening as a referance point the click comes from just infront of passenger wiper blade????

 

 

your time & replies will be greatly appricated

 

thanks

no, but i remember on my manual zed i used to get a clicking noise from in the cabin when it was on tick over and it would alter the revs

oh and moved to correct forum lol

The click comes from the clutch engaging on the ac compressor

not using A/C just window demister on the front!

temp dependent, if you out it on auto for eg: the compressor clicks in, if you press the econ button it clicks off, although you are not using air conditioning, it still utilizes the compressor, someone else might be able to explain a little better.

I will try and dig out some info

Any button other than eco or off on the heater controls engages the aircon compressor. Aircon is the quickest way to clear front screens that aren't heated anyway.

 

Ivan

this click i'm talking about comes from the fast idle control valve! ?

ok this noise happens even if you take A/C fuse out & def comes from idle solonoid,? the problem is my car dont do it??? we have tested another 2 cars & they both do it? my a/c is removed &we took a/c fuse was removed from he other 2 cars we tested ...help!!! when we test it through the conzult the solonoid works fine!

If you don't have a/c then surely it doesnt matter, with A/c the revs are raised by 100 rpm so i assume the click is the valve opening without a/c it won't need to.

this is what i'm saying its nothing to do with the A/C it seems as when A/C fuse is pulled it still clicks & the window demist still drop the revs!! but on my car its not clicking(cutting in)