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A/C doesn't work, fans operate
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Question
sahls01gmc
Hey guys, I'm having some problems with my A/C. I searched for the better part of 2 hours, but couldn't find a similar thread to my issue. I replaced the compressor, accumulator, drier tube and all associated fittings/gaskets/o-rings about 2 years ago. I haven't driven the truck recently, and even those few times I didn't use the A/C until recently.
The A/C doesn't blow cold, but all of the dash items do work as normal. When I push the snowflake, the compressor doesn't kick on. I checked the freon level, which apparently was empty. I ran a vacuum on the system, and then attempted to add freon. I was trying to put in the recommended 1.8lbs, but I was only able to put in 0.3. Here are the questions that I have:
- How do I test the HPS to make sure that the compressor will turn on when it's suppose to?
- What would cause me not being able to add more than 0.3lbs into the system?
- Is it possible that the malfunction is in the dash switch? How would I test that if so?
- Is there anything else that I am overlooking?
Please don't post "take it to a shop". I posted in the section because it said to ask only questions that I would go to a dealer for. I'm an excellent parts changer, just need some help from a fellow mechanic!
Thanks in advance for all of your help. This site has saved me more than once!
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