AC blinking light

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help-slip-franklin - 30 Aug 2005 13:22 GMT

Hi all,
I have a 1991 2X4 extended cab with 4 cyl engine. Yesterday the air
conditioner light (on the button you push) started blinking on and off in a
random manner. It seems like the air is remaining cold and the fan works
fine on all settings. When it's blinking there does not seem to be any
change in the rpm's (as if the AC is cutting on and off). Does anyone have
any ideas?
Thanks
H-S-F

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Jeff Strickland - 30 Aug 2005 18:09 GMT

I suspect you need AC service. My guess is the refridgerant is running low.
I'm not sure, but I think your '91 will have R12, which will require you to
visit an AC service shop. It the truck takes R134a, then you can buy a can
of stuff and the necessary guage and fittings for about $20 and perhaps fix
this yourself.

Your system has a high pressure and a low pressure sensor. If either sensor
is triggered by a fault condition, the AC can let you know by blilnking the
light.

> Hi all,
> I have a 1991 2X4 extended cab with 4 cyl engine. Yesterday the air
[quoted text clipped - 6 lines]
> Thanks
> H-S-F

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