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Author Topic: no vacuum at heater bypass valve  (Read 1101 times)

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john6177

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no vacuum at heater bypass valve
« on: 13 December 2009, 10:50:27 »
Can anyone out there help me. No vacuum at HBV. i need the location of the hbv vacuum solenoid. have a 2001 2.2 petrol estate with full cc.
« Last Edit: 13 December 2009, 10:51:55 by john6177 »
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Boatboy

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Re: no vacuum at heater bypass valve
« Reply #1 on: 13 December 2009, 10:59:38 »
On a 2.5 its behind the glovebox obscured by ducting, adjacent to the solenoid for the recirc flap valve.

Note you should only need vacuum to shut the hbv, i summer mode full aircon.

steve



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tunnie

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Re: no vacuum at heater bypass valve
« Reply #2 on: 13 December 2009, 11:30:32 »
i will follow this with interest as i think mine is failing. In this rather nippy weather, just pull off the vac lead to the HBV. That will force all coolant through the heater matrix, and make it all nice and toasty warm in the car  8-)
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john6177

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Re: no vacuum at heater bypass valve
« Reply #3 on: 13 December 2009, 11:42:47 »
found it swopped with recirc solenoid tested - flap not workin hbv opens & closes = duff solenoid.
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mathewst

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Re: no vacuum at heater bypass valve
« Reply #4 on: 13 December 2009, 12:02:12 »
So John was the solenoid behind the glovebox like BoatBoy said?
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john6177

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Re: no vacuum at heater bypass valve
« Reply #5 on: 13 December 2009, 15:40:31 »
yes it was. screwed to the heater box alongside the re-circ solenoid. just above the lower heater vent.
black vac rubber pipes = hbv
black/blue rubber = recirc flap
thank you all

john
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Bionic

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Re: no vacuum at heater bypass valve
« Reply #6 on: 13 December 2009, 17:21:51 »
Oops!
If you pull off the vacuum pipe from the HBV do not forget to blank off the vacuum pipe end or you will probably have even more problems.
GudLuk
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Boatboy

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Re: no vacuum at heater bypass valve
« Reply #7 on: 14 December 2009, 10:06:34 »
solenoid part number is 9194863.

Got mine via car parts connexion for £11 delivered. Local dealer wanted c£50 IIRC.

Steve

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Abiton

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Re: no vacuum at heater bypass valve
« Reply #8 on: 14 December 2009, 10:33:07 »
Have you still got the duff solenoid, Boatboy?

It would be useful to know how it fails, i.e. is it the solenoid coil going, or the moving parts of the valve part.
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