MK5 Golf GTI
All Things Mk5 => How to Guides / Troubleshooting => Topic started by: Octoparrot on April 13, 2018, 08:53:20 pm
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I recently changed my thermostat due to a low temp reading and seemingly taking a long time to warm up, I also changed both coolant temp sensors at the same time. Temp needle now sits dead on 90 within 2 miles, however out of curiosity I tested the old thermostat in a pan of boiling water and as far as I can tell it looked to be opening and closing normally so I'm left wondering could a faulty temp sensor have been causing the gauge to under read? If so which one?