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Registered
Join Date: Dec 2006
Location: Boyertown, PA
Posts: 261
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A/C Works but doesn't
I never gave this a second thought until today when it was foggy this morning and I went to defog the windows.
I was told by the previous owner that the A/C does not work so I never touched it and never cared to look into it. But today got me thinking that it probably works fine except one thing... I pushed the defrost button to defog my windshield and I heard the A/C compressor kick in and turn off, turn on, turn off, on, off... etc... So I sat there and wondered if by chance that it could blow somewhat cool if I push the A/C button, but when I pushed it nothing happened. It didn't even click or light up... I push it and nothing... dead button? I know the compressor works because it cycled on and off during the defrost. This means it MUST have pressure or else it would not come on at all, right? So there is a chance it has refrigerant, right? SO what the hell is wrong with my A/C button???
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1987 944 N/A Gray on Burgandy, Manual. Koni adjustables, lowerd. 16" two-piece Five spoke French rims. BROKEN. 2004 Pontiac GTO. 40th Anniversary Pulse Red 6-Speed with Pacesetter Long Tube Headers, catless mids, drag springs, DBA Slotted Rotors with C5 Hawk Pads. Tuned By Staging Lane Performance. |
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03-02-2007, 07:50 AM
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Join Date: May 2005
Location: Brentwood, Tennessee
Posts: 385
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The charge is probably low. When the system is off, there is just enough pressure to make the switch. When the compressor kicks on, the suction pressure drops and the switch opens. (Just a guess.)
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03-02-2007, 08:36 AM
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Registered
Join Date: Dec 2006
Location: Boyertown, PA
Posts: 261
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ok, so on my way home I did some testing. If I hold the button, the A/C cycles on and off like it would if I had the Defrost on...
jwade944, you might be right on that pressure thing. It cycles on and off way too fast to actually be working right. I figure, if I replace the button and dump some freon in, it might work fine. Any other suggestions??? THANKS!
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1987 944 N/A Gray on Burgandy, Manual. Koni adjustables, lowerd. 16" two-piece Five spoke French rims. BROKEN. 2004 Pontiac GTO. 40th Anniversary Pulse Red 6-Speed with Pacesetter Long Tube Headers, catless mids, drag springs, DBA Slotted Rotors with C5 Hawk Pads. Tuned By Staging Lane Performance. |
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03-02-2007, 03:31 PM
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Join Date: Jun 2003
Location: Phoenix, AZ
Posts: 1,327
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put some gages on it and see if there's any pressure.
the lo pressure switch shuts it down to protect the system.
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87 951, K27/6, Almond Beige, 17" Turbotwist 87 944S, alpine white, 5sp died a violent death 84 944, silver/brown, auto, gone but not forgotten "may the force be with you" |
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03-02-2007, 03:50 PM
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Registered
Join Date: Feb 2007
Location: Phoenix, AZ
Posts: 147
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dont think its youre button
pull the 2 wires off px switch jump together start ac if all runs and compresses you need freon
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1986 944 n/a hard top, black on burgundy |
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03-02-2007, 05:17 PM
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Your climate control unit's compressor switch is not latching.
The push button switch is lighted. When it's ON, it should illuminate. Are you saying the switch seemed like it was not latching in the ON position? If yes, the switch is bad. It can be replaced but you have to pull the climate control unit to replace the switch.  available at: http://www.944online.com/cgi-bin/ASI_Store.cgi?Product+skukey_1000242+944s2+climate control-944s2 Once the switch is fixed, then you can recharge the unit and test for leaks.
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1993 964 C2 still makes me smile Retired and work as needed as a pain in the **s. Last edited by bazar01; 03-03-2007 at 01:20 AM.. |
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03-03-2007, 01:13 AM
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911
