Has anyone figured out how to make an AirSense 11 stop popping with every breath?

[Lyndmc]

My AirSense 11 is making me crazy! I called Resmed, they sent me to my equipment supplier, my supplier said yeh, they do that!

So far I’ve replaced the tank, I’ve removed and cleaned the outlet seal, I’ve cleaned the mating surfaces in front of the tank, and I’ve cleaned the hose. I’m waking up 2-3 times a night, pulling the tank loose, and putting it back in. Sometimes that fixes it for the night, mostly not. If I push down on the top of the tank, it usually stops clicking, but that doesn’t seem to work as well as pulling the tank loose.

I’m really frustrated with this thing! Any suggestions?

[tlohse]

Hmm. I never had experience with a AirSense 11 as I have a 10 currently. I suppose you could change out parts. I have really have no idea.

[Lyndmc]

I also have an AirSense 10 and it works great. It uses a lot less water and it doesn’t make that noise. I currently use that unit as my traveling in-unit.

[LSAT]

I don't understand the posts telling about the Airsense 10 when the poster explicitly asked a question about his Airsense 11.

[Sleepzilla]

I don't understand the posts telling about the Airsense 10 when the poster explicitly asked a question about his Airsense 11.

LMFAO!

That was a follow-up post from the OP explaining that he has both machines, but has only experienced this issue with the 11 series machine.

[Lyndmc]

As an update, and this is very preliminary, I put a rubber band around the water tank way out on the end away from the heater pad. I figured if I can squeeze the tank while in operation and the popping stops, that may be where the pop is coming from.

After night 1 with the rubber band, two times last night I heard 1 single pop, and honestly, I slept better. Tonight I have 2 rubber bands around the tank. This tank isn’t very old, and I actually swapped the tank because of the pop.

Here’s what I think is happening. When I slam my tank in, it tightly clamps the two halves of the tank down, you can’t squeeze it and get any flex. Over the evening either air pressure, especially if I sneeze, the tank backs out ever so slightly. This allows the slightest spring in the tank gasket that you can notice when you squeeze the two halves of the tank. Breathing in and out may be pressuring and then depressurizing the tank. As the tank pressure drops, the machine ramps up and inflates the tank making a pop. If I’m correct, with 2 rubber banks installed, I should have zero pops tonight. I will update soon.

[Lyndmc]

2 nights in and no more popping! My rubber band trick seems to be working! It has to be the 2 halves of the tank popping as the pressure changes.