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Aways vacuum on heater tap 


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 Post subject: Aways vacuum on heater tap
Posted: Thu Apr 28, 2016 9:33 pm 
Fordmods Newbie

Age: 64

Posts: 3

Joined: 25th Mar 2016

Ride: EF Wagon

Location: Adelaide
SA, Australia

Hi All
Not sure if this is the correct section, but I have an EF Fairmont wagon with a heater problem, mine is I have vacuum at the heater tap regardless where the setting is, so I guess this is why I can't get the car to blow hot air?
Anyone know why this is?

 Post subject: Re: Aways vacuum on heater tap
Posted: Fri Apr 29, 2016 11:38 am 
Getting Side Ways
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Age: 53

Posts: 800

Joined: 12th Aug 2007

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Ride: AU2 XR8 ute & 91 EA bitsa

Location: Melbourne
VIC, Australia

Vacuum is used to hold the heater tap valve open, which in turn lets the coolant pass through the heater core. When the valve corrodes, it stops moving freely and can stay closed. Have you inspected the condition of the tap?



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 Post subject: Re: Aways vacuum on heater tap
Posted: Fri Apr 29, 2016 12:04 pm 
Oompa Loompa

Posts: 44

Joined: 20th Apr 2013

Ride: 2006 BF RTV

Location: Out the back
VIC, Australia

does it still have vacuum when the temp selector is all the way to hot? IIRC its a failsafe that with a loss of vacuum the heater tap opens up allowing the cooling system a little more capacity

its been a while since I played with a E series 6 though.....
 Post subject: Re: Aways vacuum on heater tap
Posted: Fri Apr 29, 2016 1:04 pm 
Getting Side Ways

Posts: 434

Joined: 13th Jul 2013

Location: Campbelltown
NSW, Australia

as mentioned in cold position vacuum to heater tap equals tap off (no heat) -
does vacuum turn off with control set to heat as mentioned previously

is the green plastic hose going to the tap-
black plastic hose going thru firewall with green one comes from engine vacuum if not switch -
heater taps fail internally and appear to work from outside - but need correct vacuum for operation

standard or climate control ?
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