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Temp gauge dropping when heaters on

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crookedd:
I had the same issue years ago. Also car never reaching 90 degrees fully in winter or dropping from 90 when constant highway speeds. Issue was thermostat.

Mk5gti:
So my issue is the needle drops when I turn heaters on
Both thermostats have been done and temp sensors using genuine parts, while driving the needle doesn’t drop, the needle will only drop at idle with heaters on

matius344:

--- Quote from: Mk5gti on August 28, 2025, 08:12:16 am ---So my issue is the needle drops when I turn heaters on
Both thermostats have been done and temp sensors using genuine parts, while driving the needle doesn’t drop, the needle will only drop at idle with heaters on


--- End quote ---

I got the same issue.

Anyone ? Oher ideas than Thermostat or temp sensor ?

rxpx69:
Penguin farts


--- Quote from: matius344 on December 03, 2025, 11:54:36 am ---
--- Quote from: Mk5gti on August 28, 2025, 08:12:16 am ---So my issue is the needle drops when I turn heaters on
Both thermostats have been done and temp sensors using genuine parts, while driving the needle doesn’t drop, the needle will only drop at idle with heaters on


--- End quote ---

I got the same issue.

Anyone ? Oher ideas than Thermostat or temp sensor ?

--- End quote ---

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