UT Bondman

Anyone else had this problem on their new MY 2015 991? Apparently it requires a new bleed process of coolant when the thermostat is replaced. Happened to me two days after delivery of the car.

Jerr Berr

Same Here ......Im having a nightmare with my TTS I think its actually possessed

duxsi

Do either of you two gentlemen care to elaborate? Thx

kosmo

so the system get flushed after a termostat change. Its not a bid deal.

CSK 911 C4S

Is it a cooling system issue or is it still these little valves failing?

https://rennlist.com/forums/991/8002...-on-991-a.html

UT Bondman

Had Check Engine fault light (yellow solid) come on, diagnosed by Porsche dealer using computer as thermostat stuck open (should be closed at cold start as you want the engine to warm quickly to normal operating temp, then opened to cool engine as needed), replaced thermostat, then got same fault with same diagnosis within 2 days. Waiting to take back to dealer when they have a loaner, since they couldn't figure out what the real problem must be within a hour or two when I brought the car back again.