I've been having an issue where the temperature on the dash on my Audi A4 tdi used to show 90 degrees Celcius when the car was warm, but since having a new clutch and DMF fitted the temperature goes to around 85 degrees, but doesn't increase, sometimes it drops to around 70 - 80 whilst driving on the motorway.
I've been to an Audi specialist to check it, and they couldn't see any problems on diagnostics, so don't think its the temperature sensor, they think it may be the thermostat. They quoted £113 to replace it, he said it would take 1 hour as he has to remove the alternator to reach the thermostat.
I phoned the Audi main dealers for a quote, and they said the part is £20.90, £2 for the housing, and it's a 3 hour job, with £119 per hour labour! Total cost is £427.03.
Is this job easy enough to do by a novice by purchasing the part and housing?