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Hi Everyone, New here but any advice would really really help... My A5 Petrol 1.8 TSFI 2015 Black Edition is not blowing hot air in the morning. I drive it to work ( 30 min drive ) it sits there for 8 hours then on the drive home ( 30 mins ) it will suddenly start to blow hot air slowly.. During this time I don't press any switches on the heater.. it just slowly comes like its taken a day and age to heat up... The engine is warming up to 90 in the morning on the way but blowing cold, the engine is not overheating and sitting at 90 if not just under... The coolant is topped up, I've been told water is flowing into the header tank so its circulating. I put my hands on the hose in the morning leading to the radiator, when the engine is at 90 one of the hoses is cold.. I assumed an airlock in the system but this wouldn't explain it working later in the day.. constantly every day... I've changed the cabin filter, no difference (not that it would)... Audi want silly money to diagnose, local garages don't have a clue.. Please save me?!
