Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: flyer 0712 on 27 December 2014, 22:25:23

Title: heater air vac
Post by: flyer 0712 on 27 December 2014, 22:25:23

If by taking the air vac hose off the h.b.v.and plugging the end of the hose makes the heater hotter what is the problem.... :y

Title: Re: heater air vac
Post by: dbug on 28 December 2014, 00:22:34

iirc its duff hbv

Title: Re: heater air vac
Post by: Andy B on 28 December 2014, 00:37:22

Quote from: dbug on 28 December 2014, 00:22:34

iirc its duff hbv

I'd say the HBV is just doing what it's told to. There's a vacuum problem ..............

cue TaxiAl &/or RobG   ;)

Title: Re: heater air vac
Post by: Broomies Mate on 28 December 2014, 00:49:54

If unplugging the Vac hose makes the heater hot, we can assume the Vac is there to keep the matrix cool.

No Vac = Hot Matrix. 
Vac = Cold Matrix.

So;

Vac all the time not allowing the HBV to do it's job.

or

The HBV is over sensitive to the small amount of Vac which will be present.


Of course, the above may be complete bollards.  I'm just seeing the valve in my Merlot Mind and taking a punt from what the OP has said.

Title: Re: heater air vac
Post by: dbug on 28 December 2014, 00:53:27

Checked and when vacuum is applied to the HBV, the water bypasses the heater matrix, and when no vacuum the water is sent through the heater matrix.

HTH

Title: Re: heater air vac
Post by: Broomies Mate on 28 December 2014, 00:56:09

Quote from: dbug on 28 December 2014, 00:53:27

Checked and when vacuum is applied to the HBV, the water bypasses the heater matrix, and when no vacuum the water is sent through the heater matrix.

HTH

Which correlates with the OP.  :y

Title: Re: heater air vac
Post by: Broomies Mate on 28 December 2014, 00:59:42

I think that breather is taken from the Vac Tank near the Pollen Filter.  Possible faulty Non Return valve.

Title: Re: heater air vac
Post by: 05omegav6 on 28 December 2014, 01:57:56

First check is that there's a vacuum present ignition on and temp set to low. If there is a vacuum present then hbv is toast, no vacuum suggests a vacuum problem :y

Title: Re: heater air vac
Post by: TheBoy on 28 December 2014, 08:22:21

Last time I saw this, it was a kinked vac behind the glovebox, that prevented the system removing the vac from the HBV, thus the HBV had constant vac.

The key, as BM suggested, is check if there is a permanent vac at HBV end. That will guide you to the next step :y

Title: Re: heater air vac
Post by: flyer 0712 on 28 December 2014, 10:37:17

Thanks...lots of suggestions so I will try them and let you know the outcome, :y :y

Title: Re: heater air vac
Post by: flyer 0712 on 29 December 2014, 00:11:25

Any one know where the vac tank / pump is on a 2.2 omega.....the vac tube from the h b v goes across the car inside the engine compartment and disappears into the sound deadening  on the passenger wing. :y

Title: Re: heater air vac
Post by: 05omegav6 on 29 December 2014, 00:14:53

Should be inboard of the pollen filter housing :y

Title: Re: heater air vac
Post by: Broomies Mate on 29 December 2014, 00:44:25

It's a bugger to get to, but as Al says, it's just behind the Pollen filter.  I hope the wife has small hands and is willing.  :-X

Title: Re: heater air vac
Post by: flyer 0712 on 29 December 2014, 01:02:07

Ha .ha. cheers matey..no wife only two exs....and i have big hands.....but i am sure my daughter will give me a hand  lol  :y :y