Cooling system issue

[MiniMental]

Have you read the codes of the HVAC module? Sounds like your temperature flap isn’t working. Which does happen.

Best way to check it’s getting hot water for heating is feel the hoses next to the battery and check they’re hot..

Also maybe worth removing your thermostat and feeling the impeller on the Waterpump to check its attached to the shaft properly, which is also a semi common issue. I doubt it’s this, as it would just overheat all the time, but anything’s possible.


54 Passat Wagon PD175
99’ Audi S4 Avant 2.7 QTO ;)