Hi everyone,

I have a 65 plate Vauxhall corsa design with around 98,000 miles on it. It has a full service history but seemingly has always had no end of issues. Most recently the amber engine light Came on and the symptoms present of the problem were that the engine temperature gauge sits at 0 and the heating is lukewarm. So I took it to the garage and they plugged the diagnostic computer in and it came back as a fault on the engine thermostat so they changed it. That fixed it for about an hours worth of drive time, temperature gauge registered engine temp with about 5 mins of driving at around 90 degrees and the heating seemed to work. Then all the same problems came back so I took it back to the garage and they replaced the part under warranty. Same again, the heating worked and the engine temp showed as normal but then whilst driving it would take longer and longer to register a temperature and then the temperature would only get up to 70 degrees. Now after exactly a week from having the thermostat changed again the engine light is back on, lukewarm heating and no temperature reading at all.

Does anyone have any ideas as to what the issue could be? My assumption is either electrical or there’s air in the system somewhere? FYI I had the whole coolant system changed a year ago and the car drives fine apart from this.

Thanks everyone