Noisy Dream Station

[tanuge]

I've been on a CPAP machine since 2008; up until June, I used an old school CPAP that had an on/off button and nothing else (A Respironincs M-series, I think).  Decided it wouldn't last forever so I "upgraded" to a Dream station.  

The first night, I noticed an odd whirring or whistling sound- not very loud, but it oscillated as my breathing changed the pressure and the fan motor's speed (whhrrrrRRRRrrr ...rrrRRRRRrrrr....).  It was just too distracting for me or my wife to sleep.  

The supplier switched it out for a new machine- same model, and for a few weeks it was perfectly silent. Then, I went on a road trip (with the machine) and when I got back, this machine seemed to have the same sound.  I messed with it for a few hours and must have done something because finally it was quiet again.  

Now, we had the house painted, moved around some, and the noise is back and won't seem to quit.

I've tried messing with the filter, going with and without the humidifier tank (which I don't normally use), switching hoses, switching masks- no good, the noise is still there- it really sounds like it's deep in the heart of the machine, probably the fan motor.  In a noisy house during the day, with a lot of ambient noise, it's barely audible, but at night, when everything is still it's very noticeable (it wouldn't be as distracting if it were a continuous, steady noise).

Any ideas as to what I might try?  Thanks for any help.

[Sleeprider]

Sounds like the blower fan is bad and the machine should be replaced. If your Supplier is willing, try to get the Resmed Aircurve 10 Autoset in place of the Philips Dreamstation Auto. The Resmed is a quieter machine, and I don't think you will regret the change. I also had a M-Series and it was a reliable, long-lasting machine. Both Resmed and Dreamstation can (rarely) have these pneumatic block failures, and they usually occur fairly early in the life of the machine. Unless there are seals or loosely connected parts, the defect is generally under warranty.