Heater Blowing Cold Air

[madstaff]

Have to agree with Watts, my A4 B7 heater was scalding hot and didn't need to be set as high as 23/25, yet my Golf is set to 25° and is nowhere near as hot.

I think it has something to do with the right hand air duct behind the dash not being adequately insulated and "loses" the heat on its way to to the vent.

[willni]

I'd be much the same, set it at 24 until the car heats up then drop it down to 19-21. In the mk5 golf I'd never venture over 21 degrees it was like a hair dryer, and the heated seats you needn't lean forward 

[mossy69]

mine was the same last year in winter I wouldn't heat up   I had the heater matrix reverse flushed it was manky lol.  works a treat now

[willni]

Thanks for the advice everyone, the Climate Flap Reset fixed it and now it's a toasty 21 degrees and not 17 degrees pretending it's 21 

[madstaff]

How do you reset the flaps Will??

Do you need VCDS??

[willni]

How do you reset the flaps Will??

Do you need VCDS??

No I used Finglonga's method:

First thing to try is a climate flap reset before doing any needless work.

Press and hold the AC button and the button for the air to come out your top vents until they start flashing.

It will make a few noises and the flaps cycle and see if that helps.

[madstaff]

Like this?? -

https://youtu.be/KJhaL65HL9Q

[willni]

Yep that's it, much easier to see than explain.

[madstaff]

Glad the reset seems to have done the trick. 

Got me worried so that's why I checked for the silica bag, as it's something I've been meaning to do.

For anyone who's interested in checking to see if there's a bag in the expansion tank, its difficult to see until you actually syphon the antifreeze out the expansion tank, then you can see it in the top left.

I clamped off the bottom feed pipe just in case the bag split whilst trying to get it out.

Gonna try the reset in the morning for no other reason than to make sure mines correct.

[2007GTI]

Hello all,

thought I'd revive this thread, as I have the same issue.

I tried a flap reset and hot air only comes out on the vent nearest the passenger door. If I close the vent, some heat come to the middle 2 vents, but none to the drivers side.

Would this be blocked heater matrix perhaps?