A/C Liquid Line Noise (Hissing) - Goodman 3-ton (Part 2)
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Uploader Comments (ljbrandt500)
All Comments (8)
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Hey, I have seen this problem before on fixed orifice systems... most of the time is because of moisture in the lines! and or a dirty or half clogged orifice. What i do is recover ALL the freon... evac the system for around 1 hour below 500 microns and charge the unit back up! And the noise goes away. Good Luck! Always have your system charged back up using either superheat if it's an orifice, or subcooling if it's TXV...
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@mikebdub410 You do not hear it when it is heating because it does not go through the orifice that is inside the house in heat.
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well new piston noises are common yours does sound normal the best thing to do is check your piston numbers for air handler and condesor if you have on a heat pump or regulor condensor unit #1st check to see if you have a liquid line drier on your system should only be one not two
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The hissing/gurgling can be normal. In many cases, a system that doesn't have a gurgling liquid line could be over charged. The liquid line filter drier, providing your contractor installed one, should be able to catch any non-condensables.
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I am going through the same thing with my heat pump. This is our first cooling season living here so every little noise gets me worried. System ran beautifully all winter without issue but also without this sound. Turned the AC on for the first time and I am hearing this. Air flow is good, temps are around 17-19 degrees diff from the supply and closest air register. Everything seems fine but since I did not hear this in heating it has me worried! Any further ideas?
mikebdub410 10 months ago
@mikebdub410 I was exactly like you in that something didn't seem quite right with the hissing/gurgling noise and I wanted to get to the bottom of it. Unfortunately, after doing a lot of research and making several inquiries, it's become apparent that the experts can't figure out exactly what is causing the noise despite good air flow, proper delta-T and superheat on target (and it cools the house just fine). In the interest of saving money, I decided to leave it alone but it is still a myste
ljbrandt500 10 months ago
If your your delta T across the evaporator is good, don't worry. With an expansion valve, a solid liquid seal is required at the expansion valve, but with a piston you will at times hear a mixture of liquid and gas feeding your piston. Upgrade to a txv and you will improve the efficiency of your system, your noise will go away and you can start worrying about something else.
dkresch 1 year ago
@dkresch Thanks!
ljbrandt500 1 year ago