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92 hatch - how come my ac only works somtimes?

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Old 07-25-2010, 06:52 PM
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Default Re: how come my ac only works somtimes?

do u kno how to take it out
Old 07-25-2010, 06:56 PM
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Default Re: how come my ac only works somtimes?

i really hope its not the hvac that seems kinda hard ill do that last.. but for now can u show me which wires to check and how many volts its saposto get
Old 07-25-2010, 08:05 PM
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Default Re: how come my ac only works somtimes?

right?? so ill save that for last.. now can u tell me what i need to check for the pressure switch and the thermestat any pics of the wires i need to check and what to look for when im lookin at the volts anything would help.. like do i need to have the car on or just the key turned.. i kno the ac cant be working to see..
Old 07-26-2010, 08:53 AM
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Default Re: how come my ac only works somtimes?

where is the thermestat
Old 07-26-2010, 09:11 AM
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Default Re: how come my ac only works somtimes?

On the evaporator behind the glove box:

Old 07-26-2010, 09:17 AM
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Default Re: how come my ac only works somtimes?

ok so now when its not working i check the wires b4 the plugs for volts right?... now if the thermistat wires dont get power then its the hvac.. if the pressure switch doesnt get volts its the thermistat or the hvac.. and if i get volts from the pressure switch its the pressure switch right?
Old 07-26-2010, 09:18 AM
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Default Re: how come my ac only works somtimes?

im just confused on where to test and how to kno which part is bad
Old 07-26-2010, 09:42 AM
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Default Re: how come my ac only works somtimes?

Test the pressure switch and thermostat terminals for lack of continuity not voltage.
Old 07-26-2010, 12:06 PM
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Default Re: how come my ac only works somtimes?

everythings working right now.. just waiting for it to stop workin so i can do some tests
Old 07-26-2010, 12:52 PM
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Default Re: how come my ac only works somtimes?

intermittent problems are such a pain in the *** to diagnose and fix. ^
Old 07-27-2010, 11:31 AM
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Default Re: how come my ac only works somtimes?

how do i jump the ac pressure swithc and where is it behind the glove box?
Old 07-27-2010, 12:28 PM
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Default Re: how come my ac only works somtimes?

It's on the receiver/dryer.
Old 07-28-2010, 02:11 PM
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Default Re: how come my ac only works somtimes?

if its the hvac would this fix the problem? http://www.hmotorsonline.com/shop/sc...age&item=20003
Old 07-28-2010, 09:16 PM
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Default Re: how come my ac only works somtimes?

well if it is the climate control unit then yes replacing it would be what you need to do. whether or not anything else is required in order to use the one you posted above i am unsure.
Old 08-20-2010, 03:00 PM
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Default Re: how come my ac only works somtimes?

ok so today my ac was not working and i started hitting the climate control and it started working.. and then it stopped and i hit it again and it went on again.. so i guess its my hvac switch then right?? how can i just test the hvac right now to see if thats the problem?
Old 08-20-2010, 06:24 PM
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Default Re: how come my ac only works somtimes?

bumpppppppppp
Old 08-21-2010, 10:19 AM
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Default Re: how come my ac only works somtimes?

bumpppppppppp
Old 08-21-2010, 12:29 PM
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Default Re: how come my ac only works somtimes?

helpp ron j where are u
Old 08-21-2010, 01:40 PM
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Default Re: how come my ac only works somtimes?

You might be better off taking it somewhere, it doesn't sound like you are very mechanically inclined
Old 08-21-2010, 01:52 PM
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Default Re: how come my ac only works somtimes?

Also might help if you wait until someone answers instead of constantly bumping. And try searching on google about this problem. You can at least do some research on your own to try to figure it out.
Old 08-21-2010, 01:55 PM
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Default Re: how come my ac only works somtimes?

wow that was no help at all
Old 08-21-2010, 04:34 PM
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Default Re: how come my ac only works somtimes?

Originally Posted by alphalanos
Also might help if you wait until someone answers instead of constantly bumping. And try searching on google about this problem. You can at least do some research on your own to try to figure it out.
Old 08-21-2010, 06:23 PM
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Default Re: how come my ac only works somtimes?

Originally Posted by swizz977
ok so today my ac was not working and i started hitting the climate control and it started working.. and then it stopped and i hit it again and it went on again.. so i guess its my hvac switch then right?? how can i just test the hvac right now to see if thats the problem?
Old 08-22-2010, 12:07 PM
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Default Re: how come my ac only works somtimes?

my car is shaking on and off when my ac is on sometimes not constant also
Old 05-31-2011, 01:53 PM
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Default Re: how come my ac only works somtimes?

if my ac doesnt work but then i hit the hvac w my fist and it turns on does that only mean its a bad hvac?


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