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air con problem 

 

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 Post subject: air con problem
Posted: Sun Jan 25, 2015 6:50 pm 
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Age: 34

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Ride: ford el xr6 1996

Location: brisbane
QLD, Australia

hi all,
just having a issue with my air con its been recently gased but started my car this morning and a screeching sound is coming from engine bay and its only when i push my air con button on that it makes it screech.

Any info would be much appreciated :D
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 Post subject: Re: air con problem
Posted: Sun Jan 25, 2015 10:01 pm 
Getting Side Ways
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Ride: '97 EL Fairmont Ghia

Location: Perth
WA, Australia

Is it really loud? It sounds like the compressor doesn't want to turn when the clutch is engaged and the belt is just slipping over it.

 

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 Post subject: Re: air con problem
Posted: Mon Jan 26, 2015 12:57 pm 
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sounds like compressor may have seized -
was engine cold or operating temperature -
remove belt start turn A/C on...try to turn compressor pulley by hand if you can't compressor will need to be replaced (and maybe tx valve plus dryer gas etc)

may have been over gassed causing it to seize when Hi side pressure builds up to hi but normally doesn't do this until driven for awhile on a hot day (degas and recharge with correct amount)
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 Post subject: Re: air con problem
Posted: Mon Jan 26, 2015 5:50 pm 
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Age: 34

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Ride: ford el xr6 1996

Location: brisbane
QLD, Australia

I looked at the belt going around the compressor pulley and its still turning . Maybe my compressor is counting down its last days of functioning. As you can hear the compressor kick in and seems to be still functioning? but makes the screeching noise as soon as you push the air con button .
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 Post subject: Re: air con problem
Posted: Mon Jan 26, 2015 10:38 pm 
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Location: Campbelltown
NSW, Australia

is noise from compressor ? - check compressor clutch for slipping /damage /metal filings etc
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 Post subject: Re: air con problem
Posted: Tue Jan 27, 2015 7:25 pm 
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Age: 34

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Ride: ford el xr6 1996

Location: brisbane
QLD, Australia

ok thanks :) will do
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 Post subject: Re: air con problem
Posted: Tue Jan 27, 2015 11:01 pm 
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Age: 34

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Ride: ford el xr6 1996

Location: brisbane
QLD, Australia

sorry guys but on a closer inspection I've noticed that my tension pulley is slightly on a angle and looks like that might be the cause :(
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 Post subject: Re: air con problem
Posted: Wed Jan 28, 2015 8:18 am 
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Ride: EF Fairmont

Location: Campbelltown
NSW, Australia

Remove the belt and spin the pulley, you will soon know when it is stuffed.

Even if the pulley in knackered it should make no difference if the AC is on or not.

Have you removed the belt and turned the AC Pulley with the AC turned on as suggested by TedW?
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 Post subject: Re: air con problem
Posted: Wed Jan 28, 2015 11:14 am 
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Ride: 96 XH/97 EL

Location: South Coast
NSW, Australia

Manually spin the front clutch plate (not the pulley), if it rotates without binding, the compressor scrolls are probably okay, if you're saying you're getting cooling.
Sounds like the plate is slipping against the pulley face when engaged, the faces will be probably burnt, so you'll need to pull off the clutch plate, and emery paper on a flat surface/wire wheel them up.
There is a spacer washer for the clutch plate, you can leave it off when assembling - I've found it can cause too much clearance in some instances, causing the plate to not engage properly. Just make sure you can see daylight between the plate and pulley, and the plate isn't catching unengaged.

Finally, if you have a front shaft seal leak, you'll find oil between the pulley and plate, meaning the system is losing gas, as well as squealing.

 

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96 XH Longreach 'S': LPG, Alarm, 3.23:1 LSD, Cruise, Trip Comp, ABS, Power Windows, Mid Series Dome Lt, Climate Ctrl
97 EL Futura S/W: LPG, Alarm, LED int Lts, Trip Comp, F/Lane Dome Lt, Climate Ctrl, T5 Conversion

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 Post subject: Re: air con problem
Posted: Thu Jan 29, 2015 5:57 pm 
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Ride: ford el xr6 1996

Location: brisbane
QLD, Australia

thanks for the help much appreciated :)
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