Vauxhall Omega Climate Control won't vent where venting's required

It's getting annoying, too.

I've synchronised the servoes (pressing auto & off for 5+ secs), to no
avail.

The Haynes manual states that the four main vents each have their own
servoes.
I've tried swapping the climate control (facia) unit, also to no avail.

Someone throw me a line here - I'm drowning.

 

Are we talking old or new shape Omega? Have you had the fault codes read to
see if that can point you in any kind of direction?
Climate control is usually very reliable apart from heater resistor burning
out.

 

Old shape - late 1999.

Have you had the fault codes

Not yet.
I bought this car a few days ago - and the heater isn't working either ...
I'm just glad it's not mid-winter !
Does the heater unit have a control box of its own, somewhere ?
I've swapped all the relays with my old Omega and all the fuses are intact
(interior and under-bonnet) - to no avail.

 

OK, I've got a fault code of 9292

 

CORRECTION : - that should be 92, from a 16-pin diagnostic connector.

Code sequence : - 12 - 12 - 12 - 92 - 92 - 92 - 12 .... and so on.

 

Fault 92 is listed as camshaft sensor (incorrect signal) for 16-pin OBD
systems.
Perhaps it's because mine's a diesel - presumably with no camshaft sensor.
In which case, it might seem that the OBD is picking up no faults.

I guess it could be a disconnected electrical connector, somewhere in the
circuit - given that it's affecting heat output (zero produced) aswell as
vent selection.

What are the chances that it would be the heater/blower itself ?

 

You have read the fault codes for the engine but you need the fault codes
for the climate control - different thing all together.
When you turn the car off do you get two lines like -- appear in the display
for temp on the heater control panel? If so there is a fault code stored in
the climate ecu. The climate ecu is the bit with all the buttons in - about
£500 - don't usually go wrong luckily.
What isn't working?
Is the fan working ok?
Is it getting warm?
Is it getting cold with eco off ( ac on)
Is the air coming out where it should?

 

Yes, I do.


If so there is a fault

I tried the (known working) one from my other omega - but still the same
issues.

Yes, fully.

No, not even slightly.

Yes, the a/c's fine.

No, there's no directionality at all.

 

Under the bonnet follow the coolant pipes that are for the heater till you
get to the water bypass valve - black plastic thing with 3 coolant pipes to
it and a vacuum pipe. With the engine warm are the pipes that go in and out
of the car hot? The valves do stick so water just goes back into the engine
and not into the car.
Hard to guess about direction problems so I think you may have to bite the
bullet and get fault codes on climate read to give you a starting point.

 

I'll check it out.

The valves do stick so

OK.
So, where's the ECC ECU diagnostic socket ?

 

if you only bought the car a few days ago then why are you spending time
trying to fix it??

take it back and get the seller to sort the problems out

 

Same plug that you used for the engine - this plug is the one dealers plug
into to check everything on the car that has an ecu - airbag included so
don't go paper clipping the wrong hole - best to go to a dealer cos their
tech 2 will give the fault code, description of the fault and also the data
list for the climate control to see what is/isn't happening.

 

Yes, the valve gets hot.
Could the two faults have the same cause ?

 

The valve will get hot but are both the pipes into the car getting warm?

 

Yes.
In fact, today I had a snoop around on the business side of the
heater/blower - and the rod controlling temp output works perfectly when
operated manually (very hot to max airconditioning).
I was a bit dismayed that a (to the) vent servo shaft didn't rotate when
redirecting it (to anywhere) via the facia buttons.
Could this be an electrical (connection) issue ?

 

OK.
By disconnecting the (yellow, 'logic ?') connector from the climate control
unit, reconnecting and piddling about with auto/hi/lo buttons, I can get the
directionality required.
But as soon as I turn off the ignition and restart, the thing goes back to
directionlessness - and it's the same with both climate controllers (both of
which are fine in my old Omega).
But one thing that isn't improved is the total lack of heat control.

What I'm wondering now, is whether any part of the climate circuitry is
contained in the ECU under the bonnet.
Does this sound like an electronic or heaterbox issue ?

 

Maybe - http://www.cavweb-forums.co.uk/forumdisplay.php?f=29
could give some advice

kgm

 

Thanks.
Just registered as Omega-Amego

 

... which yeah, I know - should have been Amigo ... but Spanish ain't my
strong suit.

Anyway, on to business.

You know that bit at the end of the movie 'Alien' - when (having blasted the
monster into outer space) Sigourney Weaver says "I got you, you bitch" ?
Well, that was me today - when I finally cracked the heating cum
vent-direction conundrum.

Know what it was ?
The climate ECU had to be hard reset twice - a hard reset consisting of
disconnecting neg and pos battery terminals and dis/re-connecting both ECU
connectors.
Joy of joys when hot air came gushing out of the correct vents ... WOOH !

Seems a single reset just wasn't enough.
Thanks for the moral, emotional and technical (me140) support - you were
great.

I just love a happy ending !

 

Probably a really stupid question.........where exactly is the ECU located
and is it then obvious how to disconnect it? Your solution might just be the
answer to my problem ............. can't get hot air to flow from the
passenger side.........cold seems ok.
Todger
PS I know where the battery is .................................