rsweeney 40 Posted March 24, 2013 Report Share Posted March 24, 2013 In my golf vr6 I have so far checked : the temperature control cable and it has no play in it and seems to work fine in opening and closing. I have replaced the auxillary water pump , in which I drained all coolant, blew through matrix then manually filled heater matrix with water, refilled rest of system, ran till fans kicked in with cap off then with cap back on took it for a spin. ( coolant temp is all good plus auxillary water pump works , both matrix pipes are hot )I really need the heaters to work but still just luke warm and I have no idea what to do next ,so any help is appreciated ! Link to post Share on other sites
VR6Pete 1,455 Posted March 25, 2013 Report Share Posted March 25, 2013 This is a little bit of a mystery mate! I have to admit...I was thinking to heater bowden cable, but if you have manually turned it from blowing cold to hot on the heaterbox from under the dashboard then I'm stumped! Especially if both the matrix pipes are getting hot.... it almost sounds like a fault in the heaterbox and it switching from cold / hot ? Link to post Share on other sites
rsweeney 40 Posted March 25, 2013 Author Report Share Posted March 25, 2013 yeah its got me stumped to , from researching the issue all I can come up with is the possibility of either : there still being air pockets in the system? or the flap being broken or not operating ? Link to post Share on other sites
VR6Pete 1,455 Posted March 25, 2013 Report Share Posted March 25, 2013 Usually you can hear the flap "switching" have you got under the dash and manually move the lever? I suppose the next logical step would be to start stripping things out of the car if your 100% sure you have a flow through the matrix? Link to post Share on other sites
rsweeney 40 Posted March 25, 2013 Author Report Share Posted March 25, 2013 yeah I have got under the dash and pulled/ pushed the lever by hand no difference.yeah im pretty sure its clear I blew through the matrix and then filled it with water through one pipe till it came through the other.( The matrix was new 3 years ago but wasn't oem cost around £20 was from a seller called B&B Components looking back I should have gone oem but it hasn't leaked and seems fine ) . The only other thing is that lots of foam bits blew through after the change due to it being old and disintegrating, and the foam is used to make seals in the ducting but not sure this would effect the heating? Link to post Share on other sites
VR6Pete 1,455 Posted March 25, 2013 Report Share Posted March 25, 2013 Yeah they are used to seal the ducting, but I lost most of mine when doing the corrado and the heaters still blow really hot! I suspect you have a flap problem lol Link to post Share on other sites
BigDaddy 0 Posted March 25, 2013 Report Share Posted March 25, 2013 which golf mate? could the heater matrix just be shagged or even a blockages in the pipe stopping warm aim flowing through to the vents? Link to post Share on other sites
rsweeney 40 Posted March 25, 2013 Author Report Share Posted March 25, 2013 heater matrix seems fine BigDaddy ,will look at the "flap" haha , how do I get to this? can I remove the large plastic casing under passangers foot well which contains fan motor at the end of it in order to view the flap? Link to post Share on other sites
VR6Pete 1,455 Posted March 25, 2013 Report Share Posted March 25, 2013 On the corrado the flap is on the drivers side, I'm sure if you look at the heater matrix replacement guide that Tony did it may identify which side it is on with the golf Link to post Share on other sites
Lukey. 381 Posted March 25, 2013 Report Share Posted March 25, 2013 The flap is on the passenger side, I've just done my heater matrix replacement! But you can't just disconnect it from under and pull it out, you would pretty much have to take the dash out as theres clips all the way round and things in the way. If you tried to pull it out just from under the dash then you'll probably (99% will) break something and have to take it all out anyway. Ball ache yes but having just done it a fortnight ago its fresh in my mind and I don't think it would be possible to do. Link to post Share on other sites
VR6Pete 1,455 Posted March 25, 2013 Report Share Posted March 25, 2013 Should be able to manually operate the flap where the Bowden cable attaches though? Link to post Share on other sites
Lukey. 381 Posted March 26, 2013 Report Share Posted March 26, 2013 Yes you can from underneath but if you want to visually confirm the flap is working you can't do it without at least splitting the fan section from the matrix section. Link to post Share on other sites
rsweeney 40 Posted March 27, 2013 Author Report Share Posted March 27, 2013 found out that the fan speed controls the very nearest flap to the fan via a cable- the outer casing of the cable is clamped to the plastic casing of the ducting using a steel clip . On mine the plastic had snapped off and so the flap must have been slightly closed, I opened it fully by hand and now the air is nice and warm! Here is a pic of how the cable should be, on mine the cable isn't secured atall.I know of a golf being broken so hopefully can get hold of a spare to fit and sort the problem for good.Cheers for the help guys really appreciate it Link to post Share on other sites
paceo 22 Posted March 27, 2013 Report Share Posted March 27, 2013 im breaking a mk3 gti if your close to bromley in kent? Link to post Share on other sites
VR6Pete 1,455 Posted March 27, 2013 Report Share Posted March 27, 2013 Good result See I knew it had to be a flap problem LOL on my Corrado, its a metal clip mounted on the heater box, and the clip just needed tweaking up to pinch the Bowden cable sleeve, giving the impression that the controls were working, but not actually opening / closing the flap! At least you know what it is, and more importantly have working heaters Link to post Share on other sites
rsweeney 40 Posted March 27, 2013 Author Report Share Posted March 27, 2013 yeah just got to find a replacement box because the car which had one I was going to pinch has been scrapped!probably quite expensive from vw im guessing? Link to post Share on other sites
VR6Pete 1,455 Posted March 27, 2013 Report Share Posted March 27, 2013 be surprised if you could even get one to be honest! Can you epoxy it or plastic weld it back to the box? Link to post Share on other sites
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