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My wife has given me the task of trying to fix her cpap machine. The manu. fisher paykel model hc604jhu. She is showing a e-1 code. can some one let me know if this is fixable. our quality of sleep has diminished greatly., thanx

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David, I don't know the error code- I guess you would need a service manual for that.  I think your best bet would be to call your DME.
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