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E34 (1989 - 1995)

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  #1  
Old 07-11-2013, 05:30 AM
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CarDriver CarDriver is offline
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Location: Saint Albans, New York
 
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Mein Auto: 1992 525it /2004 ML350
AC Button on panel

I just replaced my AC belt tension pulley and replaced the belt. My AC worked fine before the belt broke last year. Now, when I push the bottom to turn on the AC, nothing happens. The Recirculate button does not do anything either. There should be a light at the top of the button that illuminates when on. Nothing is lighting up when the button is pressed.

I checked the fuses under the hood and all are OK. Is there a relay or some additional fuses for AC under the seat or something? Scanning through the Bentley, I did not find any troubleshooting stuff on hat issue...

Thanks.
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  #2  
Old 07-11-2013, 07:21 PM
1cut808 1cut808 is offline
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Mein Auto: BMW 530i Sedan
You mentioned that the belt broke.. When it broke it didn't damage the wiring to the compressor at all did it?
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Old 07-12-2013, 04:22 AM
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It did not appear so. I even disconnected the wires and cleaned the contacts. Sucks too cause I want to begin using it as my DD and park the gas guzzler for a while. And its gets hot out there...
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Old 07-12-2013, 08:47 AM
1cut808 1cut808 is offline
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I'd be checking the fuses initially and then check to see if the A/C button is actually receiving power and if so is it switching and allowing power to pass through it to the compressors clutch? Do you have a voltmeter handy?
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Old 07-12-2013, 09:46 AM
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Sure do, I was jut hoping that here was another fuse that maybe I was missing.
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  #6  
Old 07-14-2013, 10:42 AM
paperplane94 paperplane94 is offline
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I seems like the HVAC system has entered a fail-safe mode because the compressor is not engaging or there is not enough refrigerant in the lines. Figure out if the compressor comes on at all and check the system pressure.
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