Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: Lordmpl on 23 October 2007, 11:49:16
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When I got in the car for the past 2 days there has been no heating............
Well i will go into more detail......
It takes about 15 mins to warm up, then if i put the fan on the heat lasts for about 2 mins then goes cold, with both of the dials on hot.
When turning the selector switch to feet, mid or windscreen it makes a SSSsssshhhhhh noise so there is vac there.
Its cold now, and my little feeties need some heat... :)
any one got any ideas, on what i can check????
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I'm not sure TBH, but could the vacuum control of the HBV have failed?
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I'm not sure TBH, but could the vacuum control of the HBV have failed?
How would one check, or is it checkable???
Thanks, Mark :y
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Doubt it because when vac is applied the HBV bypasses the heater matrix.
check by taking the pipe off the top of the HBV turn everything to cold and check for vac. turn to heat and then check for no vac.
Second, with heat on, check that the hbv is allowing heat to the heater matrix - you can reach the heater pipes in the drivers footwell if you take a bit of trim off. If you do not get heat then (particularly with the vac feed disconnected then either the matrix is blocked ot the HBV has failed.
If you are getting heat to the matrix but it is not getting to you, it could be the air dist unit (but I've got no expertise there...)
Suspect that as it starts hot then goes cold then there is a partial blockage in the martix or the HBV
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I think i have the same problem or very similar! ::)
with me this is what happens
if you look at the top of the HBV, there should be a pipe attached...
when mine is attached and i start the heating on HOT, it goes HOT with no Problems at all, but when i turn it to COLD and then back to HOT again, it will not get HOT whatsoever, not even warm !!!!!!
my only cure for this problem at present is to remove the pipe on top of the HBV all the time, and then i get hot and cold which can be switched back and forth with no problems, the only problem with this is when its on its coldest setting its not as cold as when the pipe is attached to the HBV !!!! >:(
something to do with Air-con aswell?
are you all confused?? because i bloody well am!! what the hell is wrong with my car?
apart from me ol mate "THE BOY" does anyone else know how to cure my problem?
Grrrrrrrrrrrrrrrrrrrrrrrrrrr
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A while back i had a similar problem, and found that the small black vac pipe had broken off of the vac pipe that runs from the brake servo to the plenium. There is a plastic piece in line where it t's off to the heater control. I managed to take the pipe off and drill the plastic and glue the vac pipe back as a temp fix.
hope theis gives you some ideas, Gary :y
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Gary, was your reply to me?
sounds bloody complicated as usual :'(
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Yes mate and to lordmpl as you both have what is almost the same problem, :y
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Gary - how much would you want for doing mine? ;D
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Sorry mate i am in no postion to help you, the best people on here are the boy or james, have look at your brake servo. there is a large plastic pipe that pushes into it, it then goes across the back of the engine bay to the plenium chamber. Just to the right of the brake servo there is a plastic piece in line of the pipe. you should see a small 3/4mm plastic pipe go into the servo pipe here. if not then it has broken off, mainly due to hands being pushed down the back to get to various parts during maintenance. I WILL TRY TO GET SOME PICS TOMORROW TO SHOW YOU WHAT I MEAN :)
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Thanks mate
just thought id ask anyway, if you have pics that will be awesome
i will take a look tomorrow
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God, its just a bundle of pipes and wires around the back there...... :-[
I have taken off the vac from the top of the HBV when on hot there is no vac, when the dials are on hot there is vac from the pipe.
So what is the next step????
Had a look for the T-Piece and broken pipe, but cant see much, where abouts am i looking???
Thanks, Mark. :y
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Just had another look, This T-Piece, does it have 2 vac pipes attached if so, yes they are!!
Its the only one i can see that runs from the servo to the plenum.
Thanks, Mark. :y
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God, its just a bundle of pipes and wires around the back there...... :-[
I have taken off the vac from the top of the HBV when on hot there is no vac, when the dials are on hot there is vac from the pipe.
So what is the next step????
Had a look for the T-Piece and broken pipe, but cant see much, where abouts am i looking???
Thanks, Mark. :y
Sorry don't quite get what you are saying here. Are you saying when dials on hot there is no vac BUT when the dials are on cold there is vac to the HBV?
If so then the vac feed is correct and your problem is NOT the vac feed to the HBV or the vac feed to the heater system, it is elsewhere like the air dist unit or the HBV itself.
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now im really confused! :'(
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now im really confused! :'(
Not the only one mate!!!!!
Yes thats what im saying, so the vac is ok, thats good...
Where is the distribution thingy???? And how can i check it??? :)
When i turn on the ignition, there is a SSSHHHHHH noise where the heater dials are, is this normal, does it when i stop the engine too!!!
Thnaks so far, Looking forward to your response, Mark. :y
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just looking through the HAYNES manual, its like reading Swarheelee!!!! ha ha
i now look as Angry as my picture! Damm these cars! >:(
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next move will be to check that the heater matrix is getting hot.
Drop the trim off from above the drivers pedals: look up to the left and find the aluminium heater pipes
Select cold on both dials: start the car up. THese pipes should stay cold because the HBV should bypass the heater matrix. If the pipes are heating up when you have cold selected then the HBV has failed.
Whe the engine is warming up, select hot: pipes should get very hot. You should then get heat from the vents. Keep running until your vents run cold and check the heater matrix pipes again: cold pipes will indicate either a HBV failure or blocked matrix. If they are still hot then I'd suspect one of the flaps in the air dist unit - but that's where my expertise stops I'm afraid
Finally, just checking that you do not have climate control: if you do there is a procedure for resetting the servos that you should try
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Now going to check that out... Will let you know in a bit....
No Climate control...
Thanks, Mark :y
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forgot to say, i have climate control on mine and have Reset the servos about 10 times, but no avail
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Ok then I have checked the Alu pipes, they stay cold when on cold, and get very hot when on hot, then on cold go cold again. But when on hot the heat is not as hot as i would imagine it to be, (based on previous cars i have had), and when the blowers are turned up high cold just slightly warm, but on setting 1 warmer, but not HOT. :(
There are 2 Alu Pipes, the top one is really hot, the bottom is more warm than hot.
Been checking other items too,
When on the foot setting - no air to feet but on windscreen and front blowers,
When on windscreen setting - windscreen and front blowers
When on Front only setting - front blowers only
When on Front and Feet setting - Front blowers only.
So i seem to be getting front blowers and windscreen all the time and no feet blowing.
I assume this is all down to the unit behind the radio, anyone know how to get to it????
And possibly how to fix it???
Any of this make any sense to anyone???? :)
Thanks, Mark. :y
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The good news is that I think you've confirmed that your HBV is o.k. and it is an air distribution problem. The unit is vac controlled - that's why you get the hissing from the dials. Unfortunately, that's where my expertise stops! I guess I'd check all the vac connections at the dials before I went digging for the air dist unit
good luck
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Can you both check the hose connections to the HBV please?
On one side of the HBV there are two hoses, the top one should connect to the heater at the bulkhead.
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Right then i have got the dials of and had a look, there seems to be a vac pipe missing, i have included some pics....
(http://i197.photobucket.com/albums/aa142/Lordmpl/IMAGE_069.jpg)
(http://i197.photobucket.com/albums/aa142/Lordmpl/IMAGE_070.jpg)
Here is the back of the vac pipe connector:
Yellow is connected to: IN
Brown: DEF
Green: FUSS
Blue: UML
The one with no pipe is: RES
(http://i197.photobucket.com/albums/aa142/Lordmpl/IMAGE_071.jpg)
Now when i turn the dial to feet the hole with no pipe is sucking. So obviously something is missing.
Anyone have any pics or a haynes manual to hand, maybe even know what is missing or not.
Thanks, mark.. :y
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Can you both check the hose connections to the HBV please?
On one side of the HBV there are two hoses, the top one should connect to the heater at the bulkhead.
Had a look, the two hoses from the HBV one goes to the top pipe in the bulkhead, the other diseapears down behind the engine somewhere.
Any Help??
Thanks, Mark. :y
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Can you both check the hose connections to the HBV please?
On one side of the HBV there are two hoses, the top one should connect to the heater at the bulkhead.
Had a look, the two hoses from the HBV one goes to the top pipe in the bulkhead, the other diseapears down behind the engine somewhere.
Any Help??
Thanks, Mark. :y
Yes and No.
The top connection on the HBV must go to the heater.
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Can you both check the hose connections to the HBV please?
On one side of the HBV there are two hoses, the top one should connect to the heater at the bulkhead.
Had a look, the two hoses from the HBV one goes to the top pipe in the bulkhead, the other diseapears down behind the engine somewhere.
Any Help??
Thanks, Mark. :y
Yes and No.
The top connection on the HBV must go to the heater.
Just double checked, the top one on the HBV goes to the top pipe in the bulkhead, this connects to the one on the inside (Top alu pipe) that gets really hot. The bottom one on the HBV is the one that curls round and disaperars down the rear of the engine.
Thanks Again. :y
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Can you both check the hose connections to the HBV please?
On one side of the HBV there are two hoses, the top one should connect to the heater at the bulkhead.
Had a look, the two hoses from the HBV one goes to the top pipe in the bulkhead, the other diseapears down behind the engine somewhere.
Any Help??
Thanks, Mark. :y
Ok, so its not that......if reversed you get no heat.
Yes and No.
The top connection on the HBV must go to the heater.
Just double checked, the top one on the HBV goes to the top pipe in the bulkhead, this connects to the one on the inside (Top alu pipe) that gets really hot. The bottom one on the HBV is the one that curls round and disaperars down the rear of the engine.
Thanks Again. :y