I should also mention that the AC is absolute shit and I have no idea how to fix it.
Most Helpful Guy
TL;DR; It's either a leak or compressor problem.
"Refrigerant leaks: Escaping gas might be the actual problem. Leaks along copper refrigerant lines will allow gaseous refrigerant under high pressure to escape—and this is a major problem. When an air conditioner loses its refrigerant charge, it can lead to damage to the compressor that will put the entire unit in jeopardy.
Internal valve leak: The compressor valve can start to leak, causing a hissing sound. This valve controls the pressurization of the refrigerant, so this needs to be repairs ASAP.
Compressor problems: It could be that the compressor itself is malfunctioning because the pressure inside it is too high. The compressor is the most expensive part of an AC to repair, and usually it’s more cost-effective to simply replace the air conditioning system entirely. If the hissing sound you hear turns into a shrieking noise, shut down the AC and get our repair team on the phone right away."
I'd get it checked out / fixed before it causes any additional problems. Periodic hissing isn't a huge issue, but constant hissing is bad.2
Most Helpful Girl
just had a problem with mine and had it fixed last week.
You may have a leak or your compressor might be having problems. If it is the compressor, goooood freakin' luck. It is expensive. I paid $800 to get mine replaced.2