911PTY

Hey guys,

A few days ago I got after a car wash a Cooling System Fault on my 2014 991 Turbo S. Anyone have any idea what it is? I've read on some non Turbo cars it is the exhaust valve. However I don't if this is the case for the Turbo S. Can anyone shed some light?

Jabs1542

I had a random Cooling System Fault message pop up on my MFD, the car was running perfectly fine. Turned out to be a Change Over Valve (COV). The dealership repaired mine free under warranty.

Note to OP, my car is not a Turbo - but it still looks like a COV failure.

spiderv6

There is a TSB for replacing coolant reservoirs and sensors. Had my C4S done a couple months ago.

Discussed here:
https://rennlist.com/forums/991/9328...e-991-2-a.html

911PTY

The fault is the heater change over valve. The car's heating unit does not work.

Does anyone know where heating AC change over valve is located in the car?

pfan

Should be #2: (991.1)

911PTY

thanks!! Is it possible you could show me the diagram for the 991 Turbo S?

911PTY

Amazing! But, could you please show me the diagram for the 991 Turbo S where the change over valve for the heater is located?

pfan

Sorry, only have the 991S.

Cloudplay

Same sequence of events for my 2014 C4S a few months ago.