Heater hoses identification and matrix

chrissib · Post by **chrissib** » 03 Feb 2007, 18:03

I have no heat coming from my heater. Suspect heater matrix but the rubbish haynes manuals dont cover my car.

I know the heater matrix is difficult to get to and is expensive if done professionally. So I was hoping to try flushing the heater hoses. I think I have located these but one of them disappears under the engine somewhere. Can anyone show me a diagram or suggest a good way of doing this. The hoses, (if they are the right ones), are getting hot on both so I think there is a flow. Suspect cr*p in the matrix.

Any suggestions appreciated..

AndersDK · Post by **AndersDK** » 03 Feb 2007, 18:26

Chris -
Try a deeper inspection/test of the airflap controls. It might be a control cable not opening the heater flap - as there is no heater tap on the Xantia.

Both hoses to/fro the heater would NOT get hot if the matrix was blocked, and I dont believe a 6/7 year old car would be prone to such problems.

nurkov · Post by **nurkov** » 04 Feb 2007, 22:27

I've changed matrix on mine and it was cheap to buy I think paid 35 for it in
http://www.eurocarparts.com/default.asp
but changing it is a whole different story took me 2 days to do it, but now when I've done it I think I could do it in one and I'm sure it was worth it.

Post by **RichardW** » 06 Feb 2007, 07:48

Just occured to me this morning (probably cos it was blinkin freezing!)....presumably it has climate control - will it get hot if you put it to max heat (the red zone at the right)? If so, suspect the temperature sensor which is in the dash behind the little grille next to the clock. On Mk1 cars you could remove this quite easily - bit more difficult on Mk11 cars as you have to take the steering wheel etc off....

f00lzz · Post by **f00lzz** » 06 Feb 2007, 15:55

My money is on the heater control flaps!! Cheap to check as well.

chrissib · Post by **chrissib** » 06 Feb 2007, 18:19

thanks for the info, but can anyone tell me where the hoses or the control flaps are, and how I can check them. I assume the matrix change was by removing the complete dashboard to get to it.

alan s · Post by **alan s** » 06 Feb 2007, 22:04

On the petrol models, the heater hoses go in through the firewall up high and are connected to a black plastic fitting with a stainless steel clip on ot; there's no hose clip, just this &*&*^%$ fitting which is permanently attached to the hoses.
If you break it, the cost of this hose in Australia is...........................

...................................................................

.................................................. WAIT FOR IT........................

...............................................A$765!! Yep you read right, Seven hundred and sixty five Pacific Pesos

The bleed valve (again on the petrol) is a black plastic screw that sits up high on the passengers side near the LHM tank and if water comes from that, I reckon that would just about put the blockage out of the equation. I am also inclined to go with the air flap theory which may(?) be accessible if the centre vents are removed.

Alan S

f00lzz · Post by **f00lzz** » 07 Feb 2007, 06:59

Unbelievable!!!!! Not sure what that is in GBP but surely it would be cheaper for someone over here to send one thro' the post!!!!!!!