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Troubleshooting A/C - Noise from compressor?


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Troubleshooting the A/C and hearing a clicking from the compressor. Here is a video of it while the climate control is set to max.

 

https://streamable.com/l5k3z

 

You can see something spinning about half a turn that coincides with the clicking. Is that the compressor clutch? Very new to anything A/C related. Any help narrowing down what the issue might be would be very welcome!

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Most likely, there's just barely enough pressure in the system to trip the low pressure switch but not enough to keep it on - in English, you're low on refrigerant. My truck started doing this just before the system went totally empty due to a bad evaporator. 

 

If you're going to do any type of A/C work, grab a set of manifold gauges, a can tap, a vent thermometer, and if doing any replacement of parts a vacuum pump. If you don't have one a small portable scale will also be very useful. You can't do it properly without special tools. Read up on the proper procedures, and don't bother with the "quick charge" kits at the parts store. It's very easy to mess something up with those. You'll need to know what type of refrigerant your truck uses. It'll be easier to deal with if it's already been converted to R-134a. The service ports will be "quick disconnects" if it has been.

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if you're still using R12 like I am, you can dump in a couple of cans of R-12A. I did THIS a few months ago and it's still going strong, and I'm an A/C moron.

Yep, got the same stuff for mine.

 

The quick-connect adapter only fits on the bottom port, so I would assume that's the low-side. You have to turn the valve on the end of the port (clockwise, it appears) to allow the refrigerant to enter the system, right?

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if you're still using R12 like I am, you can dump in a couple of cans of R-12A. I did THIS a few months ago and it's still going strong, and I'm an A/C moron.

Either steer clear entirely of that stuff or make 100% certain that you tell any future service shop that you've put propane in it. I say just shoot some 134a in it and be done

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