[txrammer01]

Title says it all, but here's a little back story. Truck has been parked for last month/ month 1/2 due to diesel prices. Went to move truck today and a/c is not getting cold. A/c was working great before being parked. Compressor is cycling at idle about ever 20-30 seconds. Desperately need some diagnostics advice. I have tried climate control on auto , max with no change. With a 134 bottle with gauge gauge moves from what should be considered a good charge , then to high pressure as compressor cycles. Please help, thanks.

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[5.7 Hemi]

Is the fan turning (locked up)?

 

[txrammer01]

Yes

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[krs]

Blend door diagnostic would be my next step. AlfaOBD

 

[5.7 Hemi]

Agreed. Where is the air blowing when you have it set to blow straight forward?

 

[txrammer01]

It is blowing out of forward facing main dash vents.

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[krs]

It is blowing out of forward facing main dash vents.

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A blend door or actuator could have failed. Not allowing the air to cool.

 

[txrammer01]

Did a leak check on ac, found nothing. Recovered refrigerant , vacuumed system which held. Weighed in new charge of refrigerant, ac was now blowing cold. This was done in morning, went out later that day blowing only slightly cool. Lines from evaporator are almost the same temp. At this point I leaning toward a stuck/malfunctioning txv valve.

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