So I put a new AC clutch on my ac today along with the low pressure switch. And when you turn the ac on sometimes it almost acts like the magnet isn't strong enough to engage the clutch all the way. You end up having to push the clutch inward a little to get it to fully lock. Once locked with the compressor running I get no cool air. I put 2 different gauges on it and it's showing a good charge. Could my compressor be shot?

 

Ive heard people putting shims on the clutch, but personaly I just change the compressor unit that has lifetime warranty if in case it acts again just take it back and get a new one.

 

Check the air gape and adjust the shims. They are only a couple bucks at the auto parts stores.


Edit: you show good pressures but no cold air? Something is wrong.

 

you need to watch the gauges with the compressor running.

 

that's what I did. If I remember correctly it was showing like 30lbs.

 

What are the pressure you are seeing on both gauges while the compressor is running? You should see 30-40 lbs. on the blue, low side, and somewhere around 200 on the red, high side, depending on the outside air temp. It sounds to me like the system is low on Freon.

 

I have no way to check the high side. I'm just going to take it to a shop I know of that does ac service.

 

If you are using one of the auto parts store quick charge gauges then they are known for for being way off. You can get a decent set of 134a gauges at harbor freight for around 50 bucks.

 

I second getting a gauge from harbor frieght (or better) if you can afford it if you plan on doing any AC work.

I just charged mine today and it's working great, but I had the gauge set which helps tremendously compared to those crappy auto part quick fill up sets.

With the gauge set, you can also buy a vacuum pump from harbor freight (like 10 bucks) and hook it to an air compressor. It takes some time with a smaller compressor, but you can pull a vacuum and hold it to make sure there are no leaks (when they system is empty that is). Then, with a vacuum still on the system, you can add refrigerant to the low side and it will suck it in.

 

Well took it to a shop after work. He hooked his machine to it and put a vacume on it to check for a leak. He said it didn't have a leak and he attempted to charge it but it still wouldn't get cold. He said for $400 he'd put a new not reman compressor,dryer and orifice tube. Ouch I wasn't expecting that much

 

If that's with a charge, that's not too bad. You'd want to make sure it gets vacuumed again when the system opens though. Plus, if the orifice tube that comes out is covered in debris, you may be looking at having the condenser changed as well.. Hopefully it's something a little more simple, but AC stuff usually isn't a cheap endeavor.

 

Thats not bad. No one will touch AC here in CO for less than 1200 on either truck... will only replace everything to warranty their work!

 

Just out of curiosity are you sure the blend door isnt stuck?

 

not a 100% sure. Are those easy to check or do you have to pull the whole dang dash?

 

Not neccesary, you can just remove the glove box to have space. Im not 100% how it looks on our trucks since ive worked mostly on SD. Maybe someone can chime in with a diagram.