All Things Mk5 > How to Guides / Troubleshooting
Coolant temp high
howie1987:
An update on this...
Changed thermostat and coolant temp sensor. and still the temp gauge on my polarfis goes up but gauge on the car still sits at 90.
No coolant being lost either. water pumped just been changed aswell.so god knows what it could be.
Could it be polarfis has a fault?
Shoduchi:
The PolarFIS reads from the Engine measuring blocks. You can use VCDS to confirm the coolant temp that the PolarFIS show.
Your engine should have 2 stats and 2 or 3 temp sensors.
howie1987:
--- Quote from: Shoduchi on March 16, 2016, 07:58:58 pm ---The PolarFIS reads from the Engine measuring blocks. You can use VCDS to confirm the coolant temp that the PolarFIS show.
Your engine should have 2 stats and 2 or 3 temp sensors.
--- End quote ---
cheers i will look in to the other stats. its getting plugged in tomorrow so should find out then.
Another thing it couldn't be the big fan not kicking in? do you know when that is ment to kick in as i never hear it come to think of it.
cheers
Dan_FR:
Fans should kick in at around 93-94 degrees C as measured through VCDS/PolarFIS. Can't remember for sure but I think both of mine come on in the Leon at the same time.
Forget the dash readout - its useless. Temp should get to and reach the low 90's (90-95) and stay there (Stage 2+ too)
howie1987:
--- Quote from: Dan_FR on March 17, 2016, 07:31:16 am ---Fans should kick in at around 93-94 degrees C as measured through VCDS/PolarFIS. Can't remember for sure but I think both of mine come on in the Leon at the same time.
Forget the dash readout - its useless. Temp should get to and reach the low 90's (90-95) and stay there (Stage 2+ too)
--- End quote ---
I don't think my fan is kicking in unless i turn in the aircon on. then the engine cools down straight away when its on.
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