All Things Mk5 > How to Guides / Troubleshooting
Operating Temperature Not Reaching 90
jaye2992:
Anybody have a part number for the coolant temp sensor? Mine gets upto 90 finebut then occasionally drops and then goes back to 90....garage I got it from said they had changed the thermostat so hopefully not then. Unless they lied.... Thanks :)
chris s:
I've got a temp sensor I never used it you want it...£15? I had the same issue with my car and it definitely sounds like it's the main thermostat to me
jaye2992:
The one that goes on the intake side? Gets to temp fine but drops and then goes back to 90? Got a receipt for new thermostat so don't know whether to take it back to them or not hmmm
chris s:
Yeah that's the one I've got spare, but to be honest it does sound like mine which was fixed when I had the main thermostat replaced
jaye2992:
Cheers I will let you know if I need one :) probably will ring the garage tomorrow where I bought the car....they were meant to change the thermostat. Just been for a drive out and it was all good till going steady in 4th then it dropped to 70degrees and slowly went back to 90 haha.
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