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04-20-2015, 12:13 PM
I've had the S9 unit for about 6 months and have had no problems. Recently the unit has become noisy with a kind of whistling noise upon exhalation. I've changed the air filter but it still is noisy. Sounds like it's deep in the machine. Keeps me awake. Ugh. Any thoughts.
04-20-2015, 12:57 PM
(04-20-2015, 12:13 PM)snorer131 Wrote: I've had the S9 unit for about 6 months and have had no problems. Recently the unit has become noisy with a kind of whistling noise upon exhalation. I've changed the air filter but it still is noisy. Sounds like it's deep in the machine. Keeps me awake. Ugh. Any thoughts.
It has a 2 year warranty, so it sounds like it's time to bring it in for service.
The only two reasons that come to mind are that something got sucked up into the blower, or something is broken/out of place. In any case, it's not something you would want to do yourself, while it's still under warranty.
WELCOME! to the forum.!
There are a couple threads here on the board about S9 noise.
If you look under "Possibly related threads", you will find them.
Edit: Here are the links to these threads I mentioned: http://www.apneaboard.com/forums/Thread-S9-making-noise
http://www.apneaboard.com/forums/Thread-ResMed-S9-Noise End edit.
Hang in there for more suggestions and answers to your question and much success to you with your CPAP therapy.
04-20-2015, 06:46 PM
Some of the S-9s have a habit of making a tiny, very very slight noise upon exhale. No big whoop if that is what it is.
I did have one (still do, don't use it any more) that started with a louder growl which I presumed was a bearing starting to make noise, meaning a bearing that was failing. It only had 1800 hours TTAF, but I had bought it used and it was long out of warranty. Resmed will not sell replacement parts, even to certified repair shops, so I am SOL. I guess I may find another used one that has something else wrong and maybe make a Frankenpap. Oh, well.
04-21-2015, 11:46 AM
Quote: Recently the unit has become noisy with a kind of whistling noise upon exhalation. I've changed the air filter but it still is noisy. Sounds like it's deep in the machine. Keeps me awake. Ugh. Any thoughts.
I know that sound well ! Noticed if you exhale slowly you won't make that sound . Found I go to bed totally relax then mask up and turn on machine I don't get the whistle. Breath hard get the whistle. funny part is not all machines do it . Almost sounds like exhalation pressure is bucking the turbine . Have a S9 Vpap with about 160 hours on it , It does it . have a S9 autoset with about 570hr it doesn't .
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