Guy Currie

Hi Steve Don’t know if this helps but to avoid any issues, I sometimes start the car in the morning and let it run for 10mins then turn it off. Then set off maybe 30 mins later and never have a problem. Does that point towards a sensor issue? I really appreciate your help and thanks to Gareth for forwarding this to you. cheers Guy

Hi Steve. Thanks again for your reply. The sensor doesn’t look to be very expensive so definitely worth a punt as replacing. Is this a job for a garage as my mechanic skills are pretty limited?

Hi Steve. Thank you for taking the time to respond. I drove the car three miles to the local supermarket today and the fan came on just before I stopped. I’m pretty sure if I continued driving then I would get the “coolant temperature too high” warning come on. I turned the engine off and the fan stopped. I got back in the car about 10 mins later and drove home with no issues and no fan starting. I regularly drive 100-200 miles a day in the car. The issue only happens after the initial cold start. Once I turn the engine off and then restart it after a few minutes I can drive it all day with regular stops and starts with no issues. If it was a faulty temperature sensor why do I only get the issue from initial cold start then nothing after that? thanks Guy

Hi Cliff. I’m referring to the temperature level not the level of the volume of coolant (which is fine when looking at reservoir). When the warning of “coolant temperature too high” comes up the temperature level showing on dash is still showing as normal

Thanks so much Gareth. I’ll keep you informed on any progress kind regards Guy

Hi Gareth. I’m told the water pump has a shroud system which allows the engine to heat up quicker and this shroud works on a vacuum system. Apparently this system is the most common failure when it comes to coolant issues and they told me they tested the old one and it was sticking. excuse my ignorance but how do I send a personal message to Stevey Y? Also, wise words regarding Audi main dealers 😀

Only just joined this forum, posted a question and had two replies from Cliff and Gareth almost immediately. Thanks guys, very impressive

Thanks Gareth. I’ve been using an Audi “specialist “ but maybe the time has come to bite the bullet and let an official Audi garage look at it. The problem I’ve encountered is that when they plug it in they’re telling me no faults are showing so hard to accurately diagnose the correct course of action.

One mechanic suggested a solenoid sticking? Does that make any sense?

The problem started about a month after the water pump was replaced. The thermostat was changed about 9 months prior to the water pump

The temperature level on the dash is always normal when the fan starts and when I get the warning that coolant level is too high i have checked coolant level in reservoir and it’s fine and not loosing any coolant

I have a 2018 A7 55 tfsi. I’ve had a new thermostat and water pump recently fitted. If I drive the car from cold within a few miles the fan will start. If I continue to drive I get the warning “coolant level too high” As soon as I stop the fault goes away. If I then drive off it can come back, however if I turn the engine off then restart a minute later I will have no issues for the rest of the day and the fan never comes back on. To avoid this, I have resorted to starting the car on the drive and letting it run for 5mins then turning it off and leaving it for a few minutes before setting off. Very frustrating! Any ideas PLEASE