Air conditioning cump keeps running
 

With the air turned off, the pump kicks on and off. What could cause this?

It doesn't blow real cold air when it is on. Could low referigerant cause the pump to run?

Thanks

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'92 GT conv.
TFS heads, GT40, Powerdyne 9#, AOD, 3.73
My Mustang Page

low refrigarant won't cause it to run,just won't work as good(if frigarant gets to low it will mess up compresser though)

if the defroster or mix setting is on the compressor will run....might be it,if not you can just unplug compesser.....won't run

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i'm really a not so old guy with 87 gt.......87gt,T top -169,000 on odometer-14.7 qt.m/80 capri(future project)

It runs in the off position.

I did unplug it.

But in normal usage, what is it that causes the pump to engage? Is it refrigerant pressure? tempature? I'm wondering if there is some kind of sensor or relay somewhere that could be malfunctioning.

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'92 GT conv.
TFS heads, GT40, Powerdyne 9#, AOD, 3.73
My Mustang Page

My 93lx is doing the same thing. Maybe it's normal.

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NA 347 W/ stage 2 Canfield heads, out of the box Victor 5.0 intake, solid roller cam, Aeromotive fuel system, proshifted TKO II.
MY CAR http://www.mustangworks.com/cgi-bin/...splay.cgi?1288

Is it possible your control is in the defrost mode?

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'89 LX 5.0 - 5 speed. Original Owner
'94 E-150 4.9 Conversion Van