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Model specific boards => Golf mk7 => Topic started by: golfgti999 on 23 November 2022, 21:44

Title: First post - heaters blowing cool air help
Post by: golfgti999 on 23 November 2022, 21:44: Hey all!

New to the forum. I have a 18 GTI DSG in Silver for 13 months and I love it.

Recently, the fans are blowing cool air, doesn’t happen all the time but can happen while driving.

Does this happen to anyone else? Has anyone had this problem that has fixed it?

Thanks in advance!
Title: Re: First post - heaters blowing cool air help
Post by: joe6 on 23 November 2022, 23:00: A bit obvious but have you checked the coolant level? You could try and recalibrate the climatronic flaps as a first check. Switch on the ignition and hold the ac button down at the same time as the button that directs the air into the car at face level. Release the buttons and the lights on the buttons should flash. This checks the flaps move their full range and returns them to the normal setting. Switch off after they stop flashing. Another possibility is the coolant thermostat if the heater temp varies when driving. Does the water temp gauge fluctuate? Have you run a fault check using obd11. Always a good pointer to possible issues.

I expect the experts on the forum will have other suggestions.
Title: Re: First post - heaters blowing cool air help
Post by: breezasib on 23 November 2022, 23:04: I had a similar issue on a brand-new Mk7 GTI. After investigation, they said they would have to remove the dash to replace the heater so I rejected the car. No way I was going to let them rip out the dash on a new car!

Hope yours is something simple.
Title: Re: First post - heaters blowing cool air help
Post by: jaceyboy on 24 November 2022, 12:03: Isnt this the heater matrix issue where the silica bag splits?
Title: Re: First post - heaters blowing cool air help
Post by: SRGTD on 24 November 2022, 12:13: Quote from: jaceyboy on 24 November 2022, 12:03
Isnt this the heater matrix issue where the silica bag splits?

That was what I was thinking it might be.
Title: Re: First post - heaters blowing cool air help
Post by: golfgti999 on 24 November 2022, 14:05: Thanks for the replies.

I topped the coolant off about 3 months ago but I will check that again after work.

It usually stays hot and then suddenly it will just go cool
Title: Re: First post - heaters blowing cool air help
Post by: symonh2000 on 25 November 2022, 10:15: It will be worth checking your silica bag. Even if it isn't the problem this time it is worth removing it to save issues at a later date...

You should be able to feel it if you shove a finger into the expansion tank. It is at the 2-3 o'clock position when looking towards the driver seat from the front.
Title: Re: First post - heaters blowing cool air help
Post by: Finglonga on 26 November 2022, 09:50: Have you done a flap recalibration? Instructions can be found for the system you have on YouTube.
Title: Re: First post - heaters blowing cool air help
Post by: Vwjap on 28 November 2022, 17:51: I’m sure the techs at Vw told me this is normal, the car gets up to temperature then the heating lowers to match the temp you have selected, and sometimes it’s cold air out the vents, which is rather annoying
Title: Re: First post - heaters blowing cool air help
Post by: symonh2000 on 28 November 2022, 18:00: Unless it is in auto mode, you should get warm air constantly by selecting a high temp on the dial and having the fan on.
Title: Re: First post - heaters blowing cool air help
Post by: Watts on 28 November 2022, 19:32: I've been getting this lately, it seems the face level vents let the cool air out and warm air comes out by your feet. I'm now closing the face level vents and the car stays nice and warm.