I use the ResMed S9 AutoSet machine. My machine is almost 4 years old and up until now has worked fine with very little or no noise during running time. Last night the machine woke me making what is best described as a 'static' noise. The noise from the machine was loud enough to also wake my husband.
At first I thought maybe it was a leak from one of the hoses, either the long or the short hose. I got up and switched out both hoses and a new pair of pillows for my mask. About an hour later the noise from the machine returned and by that time I was wide awake - so I got up.
Does anyone have any idea about what could be wrong with my machine? What kind of noise does this machine make when it the operation of the machine is defective? Don't they last more than 3-4 years?
Possibly the bearings on the blower motor shaft are excessively worn.
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