All Things Mk5 > How to Guides / Troubleshooting

New Thermostat Needed? | Solved

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Matthewsimone:
That be a no then  :indifferent:

Jarre:
Sorry I didn't see this reply....

I can't say that I noticed my heaters to not be working - I only got the car early December so it's been cold the entire time I've owned it and never been cold in the car. Also, my temp gauge never reached 90 on a dual carriageway/motorway, only at stand still or crawling traffic. It sounds to me like you may have a different issue!

pudding:
Yep, mine was sitting at 75 and the heaters were rubbish, as was the mpg.

Changed it out today and it's a lot easier than people make out tbh.  Total cost was £70 for a new stat and sensor from VW, plus 4 hours of my time  :smiley:

Weirdly, the old stat was fully closed like the new one, but replacing it has done the trick, or maybe it was the sensor, who knows.  Good learning experience either way!

Heaters are now hot and the engine feels better, so well worth doing.

Shoduchi:

--- Quote from: Pudding on March 24, 2016, 05:00:06 pm ---Yep, mine was sitting at 75 and the heaters were rubbish, as was the mpg.

Changed it out today and it's a lot easier than people make out tbh.  Total cost was £70 for a new stat and sensor from VW, plus 4 hours of my time  :smiley:

Weirdly, the old stat was fully closed like the new one, but replacing it has done the trick, or maybe it was the sensor, who knows.  Good learning experience either way!

Heaters are now hot and the engine feels better, so well worth doing.

--- End quote ---
It's a chronic issue that these engines have. People should check with VCDS or any other OBDII diagnostic tool what temperatures they run while driving, if they don't have PolarFIS or something like it to check the temps. :smiley:

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