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When I turn on a/c the light on button flashes.. blows Luke warm air from vents, I replaced ac relay no change- truck will be sitting for a week- have not looked at compressor yet or system- belt was changed a few months ago due to miles and it being original belt - 127k on truck- - plan on getting a manifold gauge set when I get back
Any suggestions from you guys on this ?
Thanks
I don't know specifically on this vehicle but often a blinking light means you've asked for something that the computer has a reason to not give you. Most likely it's low on refrigerant and the computer isn't turning on the compressor. In most cases you need around 30psi in the system to turn on the compressor. It might even be cycling below that threshold, building up and turning on, then dropping low again. That's a symptom of low refrigerant.
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