[carocollins]

Sometimes my ac will work fine and other times it will randomly start to put out hot air and start making a loud clicking noise every few seconds. I previously had issues with the evaporator temperature sensor having the wires come out. However that has been reattached and shouldn’t be the issue.

Here is a link to a video of the sound I recorded:
https://youtu.be/cl3MV7UpmHk

Any ideas of what it might be?
I have never worked on cars before so my knowledge of engines is limited.

 

[SubRosa]

Perhaps the compressor is short-cycling due to low Freon, making those periodic clacking noises.



There is a system pressure switch that shuts it down if too low.


There is a point where pressure will be high enough when first starting to run, but as it draws the low side down, it trips off.



It will come back on a bit later when the low side is back up as the system equalizes. Have it checked with a gauge.


S u b R o s a

 

[carocollins]

I had the Freon checked today and it’s full. No leaks or anything. So that doesn’t seem to be the issue.

I’m wondering if it’s the evaporator sensor but if the wires had come out again it wouldn’t be working at all, not these random times of working and not working.

Any other ideas?