heater stone cold

Post by **les** » 28 Nov 2009, 14:59

hi all looking for ideas on a cold heater on 93 xantia td new thermostat fitted system drained flushed rad and matrix with hose pipe re filled and bled system still cold heater am i looking at a blocked matrix when i put the hose pipe on to the matrix top pipe water came from bottom pipe could it still be blocked despite this both hoses to matrix are HOT regards les

MikeT · Post by **MikeT** » 28 Nov 2009, 15:42

If the matrix seems to be getting hot then I'd assume the mixing flap isn't working and venting cold air only? I'm sure the more knowledgable ones will have a more accurate diagnosis.

Post by **Peter.N.** » 28 Nov 2009, 18:35

Are both hoses at the same temperature? If so, as Mike says the flap is not operating, if not heater matrix blocked or air lock.

Post by **CitroJim** » 28 Nov 2009, 19:58

Did you bleed the matrix at the bleed point on the matrix connection elbow Les? There's what looks like a tyre valve cap there and that unscrews to bleed air.

If yours is non-aircon then all the flaps are bowden cable driven. It;s not unknown for the cable inners to kink at the control panel end. the slider moves but the movement is not communicated to the flap.

Post by **les** » 28 Nov 2009, 20:40

thanks for reply chaps both matrix hoses about same temp yes jim bled at valve near matrix let coolant flow for about a minute or so. whilst operating heater temp slider it sounds as if its working i can hear it slap for want of a better phrase

Martin Beevers · Post by **Martin Beevers** » 04 Dec 2009, 16:34

Les,
I have the same problem. I just get minimal warm air. Mine is a slapper too...

Err, sorry Mrs not you...

Have you managed to sort yours yet?