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Discussion Starter #1
hi there to you all, as you can see im pretty new to this. just brought 96 omega elite, great car and very impressed, but having problems with auto climate control-arrgh. just had air con re gassed, but now no heat coming from climate control regardless of settings then i start to mist up regardless of settings. cooling system appears to be ok with all pipes feeling the same temp when warmed up. any ideas or things to look for or is this big bucks to get sorted. appreciate your help:bananasmi
 

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Hi and Welcome if you haven't been already.

3 Possible solutions.

1. Misting up = Blocked drain holes at bulk head, 1 is on Offside to the left of the wiper arm under bonnet, 2nd underneath Pollen Filter Near side under liftable flap on the Scuttle Panel.

2. Pollen filter will be blacker than the ace of spades.

3. Air con servos need to be reset, Press and hold Auto and Off simultaniously for 15- 30 secs you will hear the servos reset.

Check all of the above and if nothing changes there is an abundance of helpful bodies on here.


Alan
 

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The misting is most likely:

Blocked drain hole as above - pollen filter will be wet. Clear blockage and replace filter.

Failed heater matrix - carpet will be wet. Bit of a nasty job by all accounts.

As for no heat, in addition to resetting servos, could be a whole number of things, such as vacuum pipes come adrift, so we may have to take 1 step at a time.
 

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Discussion Starter #6
thanks guys, looks as though it is going to be a fun weekend ahead. what i can say is that the car interior floor is dry so hopefully rules out leaky matrix!!!!. will keep you informed
 

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Maybe, but they are still more expensive ;)

Can I use them in prefacelift, as I have a couple here?
 

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Discussion Starter #10
well pollen filter had seen better days and so had that drain hole-boy that holds some crap! still no heat, so im going for a complete rad and matrix flush. any quick tips on matrix cleaning as it looks a bugger to get to?
 

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If no heat, could be a vacuum pipe has come adrift, or heater bypass valve (hbv) has stuck. Might be worth checking vacuum from hbv back to vacuum reservoir is connected...
 

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Discussion Starter #13
hi again, been a busy old week, now got a few days off work to further investigate this heating problem. you mentioned the 'vacuum' pipe and 'heater bypass valve' where in fact am i looking for these items are they easily accessible? many thanks-will let you know end result
 
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HBV is at the back of the engine on the drivers side. Looks like a 3" round black plastic box with 3 hoses and a vacuum hose. To see it and get to it properly, remove the wipers and scuttle panel.

If the vacuum pipe has come off, it won't work.
 

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Discussion Starter #15
Hi, is there any easy way of removing hoses that go to heater matrix through bulkhead? managed to remove top hose clip(and that was bad enough!) but one beneath appears to be stuck firm, clip itself slides backand forth but hose wont budge!!!!!!!!
 

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are the hbv's easy to change once the scuttle panel is off and how expensive are they?
and can they be seen with out removing the scuttle panel?
 

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Discussion Starter #19
well cooling system thoroughly flushed through inc heater matrix, all what came out was relatively clean-no sludge etc, all topped up with long life antifreeze took car for 20 min drive and still no hot air!!! temp guage is reading 92'C, climbs to around 100'C in traffic but drops to 92'C on run. fan cuts in as normal. all pipes feel hot in engine bay with exception to heater matrix-top hose is very hot and bottom hose is hot, yet matrix flushed through ok even on reverse flush. vaccum hoses seemed to be ok, what else could be problem- help
 
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Air locks. (and the same to you:lmao: ). No seriously. Could be a simple air lock, could also be vacuum pipes still if you have climate control.
 
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