Car heaters not blowing hot air?

[Oaksy89]

Got my Nova up and going after new matrix dash etc and the blowers are working jusy not blowing hot air? The heater matrix pipes are getting hot like rest of system just don't understand y it won't blow hot Air?

[Royston]

Heater flap on cold? cables come off controls?

[ECO16V]

Im having the same prob with the GSi since I fitted a new headunit last weekend, was told I have maybe pulled the cable off at the controls, how do I get in to sort this out?

[bazil]

check the cable is still connected to the valve, simple sticking your head in the footwell and lookin job :)

[AlexW]

And remember, You wont get hot air out of the centre vents.

[bazil]

And remember, You wont get hot air out of the centre vents.

is that for real? if so i never knew that, is that for mk1's too or only mk2?

[AlexW]

mk1 and mk2, Center dash vents only blow cold.

[ECO16V]

when I turn the control I can here something slipping, but if I push the cable up towards the control the heater works fine when I turn the knob from hot to cold.

[Connor]

sounds like the clips have snapped on your cable, same happened on mine,
Try adjusting the heater control manually by moving the lever with your hand.
(follow the cable to see which arm i am on about) you will also see if your cable clips snapped or not. If that makes any sence
Unless its a possible thermostat problem maybe

[ECO16V]

Tire adjusting the heater with the lever and it works fine that way, whereabouts are the clips you are talking about mate?