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[ChrisPee]

Please help!

My poverty spec 8 valver had a heater that was about as warm as human breath in the winter, this led to me replacing the clogged matrix  in Feb. Although it has a tiny leak (had to reuse the O rings as the new matrix came without them) I can live wit that, what is driving me mad is the fact that once the car is up to temp the matrix is red hot....which is great - but so are my feet in the roasting foot-well!

Does anyone have any suggestions or have I done something wrong? The heater brows cold out of the face-vents, but with no air-con in 25+degrees weather it's like driving a sauna! 

[cam.in.head]

hi. if it were me i would first try a manual reset on the system to set all the flaps etc.
and then i would check the actuator levers/ rods. they can slip out of the ends easily .mine were out.
you will need to remove the upper trim pieces( cardboard/foam ) and then some parts of the side where the console goes to the front and meets the heater. i beleive there is a guide to this.
there are little control motors that move the levers and flaps .it will make sense more when you have a look !

[Doctor Gollum]

Purely mechanical system on that, so check that everything is still connected after the matrix change and that all the knobs and levers function correctly

[cam.in.head]

ah sorry dg didnt realise that.
that should make it a lot easier to find fault thou for him !

[Doctor Gollum]

ah sorry dg didnt realise that.
that should make it a lot easier to find fault thou for him !

True dat

[ChrisPee]

The temp dials do change the temp, what I can't get my head around is, if you set to cold is it meant to stop the hot water circulating through the matrix? Or am I being completely stupid? It's residual heat radiating from the matrix making the foot-well like an inferno. 

[Doctor Gollum]

Does it have an Hbv under the bonnet?

[ChrisPee]

Errrrm, what's one of them? 

[Doctor Gollum]

Heater bypass valve...

[ChrisPee]

I think I've seen on another thread this valve - is black and round like a giant heater dial? I will have have a look tomorrow. Can they be retro-fitted if I don't have one? That will definitely solve it. 

[Doctor Gollum]

I know they're fitted to all Omegas with Electronic Climate Control, regardless of age, but not sure if this applies to aircon or non aircon cars

That said, they're vacuum controlled, so would be easy enough to engineer a solution with a vacuum switch and some plumbing