Replies

1. Expert Member
   Akos | Aug 11, 2020 10:13pm | #1

   Is that a multi split or a single unit? Sometimes the multi split will dump refrigerant through the non operating head when the other head cycles off.

1. 
   GreyWolf92 | Aug 11, 2020 10:27pm | #2

   Thank you for the reply. It's a single unit. Everything seems to be working fine (ac and heat). Should I be worried about refrigerant leaking?

1. Expert Member
   Akos | Aug 11, 2020 11:10pm | #3

   The noise can be either
   -mechanical, some blower or motor is running when it shouldn't
   -refrigerant flashing off in the indoor head
   -electrical, one of the power supplies or inverter is not well designed or semi-smited (some outdoor units make a similar noise when they are not running).

   If you click off the breaker and it is still making that noise that it can be only refrigerant. Most units do have a bit of a whoosh sound when you power them off but not for very long.

   It could be that it was always there you just started playing more attention to it. For example, one of my wall mounts has a blower with a bad bearing. I never noticed it before but now that I know what the sound is, I can't not hear it.

1. 
   GreyWolf92 | Aug 12, 2020 01:21pm | #4

   Thank you for the advice.

   Ok so to be clear... because it still makes the noise when the breaker is off, you say it's 100% the refrigerant? Does that mean it's leaking? If so, should I be concerned for my health?

   And what does it mean exactly "refrigerant flashing off in the indoor head"?

   What would you recommend the next steps for me?

2. 
   GreyWolf92 | Aug 18, 2020 11:35pm | #8

   Is there any chance of a leak with the AC working completely fine?

2. 
   walta100 | Aug 12, 2020 03:50pm | #5

   I doubt the sound is refrigerant escaping the system IE a leak.

   Flashing off is when the liquid refrigerant boils and turns gas and sound like boiling water in a pan.

   Without any valves or restriction in the indoor refrigeration tubing you could hear sounds like boiling water or flowing water. I cannot think of a way to get the chirping from the refrigerant.

   I know you said it is not electrical but it sounds likes a motor to my ear. There are small motor in most minis to move the air vanes left and right deluxe models have 2 and move up and down also. Are there any wires that go from the indoor unit to the outdoor unit?

   Walta

1. 
   GreyWolf92 | Aug 12, 2020 06:04pm | #6

   Hi Walta,

   Ahh thanks for clarifying. Others have said the sound could be turning from liquid to gas as well. I think that makes the most sense. Is there anything that would make this randomly starting doing this? It happened after a power outage.

   Yes there are wires that go from indoor to outdoor unit. This is the only unit in the house.

2. 
   GreyWolf92 | Aug 18, 2020 11:27pm | #7

   Is there any chance of a leak with the AC working completely fine?

3. 
   sixis | Jul 25, 2022 06:13am | #9

   did you solve the problem?
   mine does exactly the same. Chirps when its off. when its cooling the sound is gone.