Ac system

Asked by Jul 07, 2017 at 05:56 PM about the 1994 GMC Sierra 1500 C1500 SLE Extended Cab LB

Question type: Maintenance & Repair

I recently filled my ac system with freon and cold air
only lasted 3 days and now it blows hot air , what's
is the problem with it ? And how can I fix it ?

2 Answers


You most likely have a leak somewhere. You can put some leak dye detector in or have a shop do a sniff test with a freon detection tool. Obviously likely areas are the hoses and fittings but sometimes the seal on the compressor will leak out which would mean replacement or rebuild.

1 of 1 people found this helpful.

Where do I get the dye detector ? And once I have It how can I check for leaks with it , or where do I put it to check for leaks , reason being is that I want to learn how to check it and or fix it myself in case in the future I have more issues with it ? Thank you !!

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