Coolant Sensor Mk4 Golf

Right basically it hasnt worked since i got it back from the garage a fe months back, meaning it doesnt give a reading on the dash i have checked for the usual air blocks etc. It does give a reading when it warms up in traffic but not anything near 90 where it should be, the fan isnt kicking it but that my be due to how cold it has been out lately. Its a blue sesnsor should it be a green one? Any ideas guys ?

could be a faulty sensor

sure its not your thermostat?

well it was all working fine before it stood around would that cause the thermostat to clog up? i did flush the coolant system through last month to try and sort it anyway.

well if it warms up in traffic and doesnt kick your fans in thats nothing to do with your sensor... your thermostat is stuck open...

okay tiz ill have a look see tomorrow cheers guys.

The snesor with the blue plug is it at the side of the head where the top hose joins?

If it's blue then it's an old one the newer version has a green plug. Should be 4 pins? New sensor with seal is about £30

If your finding it's taking ages to get upto temp and only when in traffic it sounds more like Tiz said the thermostat is stuck open. Not too bad to change but for some reason VW fit stats in the bottom hose not the top one

Ian83 wrote:

The snesor with the blue plug is it at the side of the head where the top hose joins?

If it's blue then it's an old one the newer version has a green plug. Should be 4 pins? New sensor with seal is about £30

If your finding it's taking ages to get upto temp and only when in traffic it sounds more like Tiz said the thermostat is stuck open. Not too bad to change but for some reason VW fit stats in the bottom hose not the top one

yea they fitted a new blue sensor at the garage so im thinking it must be the thermostat

Yep, definitely a thermostat issue.
My old man's having the same problem with his TVR Cerbera.

Did a bit of research and found out it was his thermostat.
He still hasn't got round to fixing it yet though......lazy.

Stampers wrote:

Yep, definitely a thermostat issue.
My old man's having the same problem with his TVR Cerbera.

Did a bit of research and found out it was his thermostat.
He still hasn't got round to fixing it yet though......lazy.

take it out mate and stop bragging

pictures are mandatory stamps

Tiz wrote:

well if it warms up in traffic and doesnt kick your fans in thats nothing to do with your sensor... your thermostat is stuck open...

Sure sign of a knackered thermostat.

changed the thermostat today still no reading on the dashboard gettg fooked off now.

did you confirm the thermostat was good before fitting.....

Tiz wrote:

did you confirm the thermostat was good before fitting.....

yea strung it up in some boiling water. openes fine thinking ill get one of these green temp sensors now.