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[CPAP] Burning Smell
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OMyMyOHellYes Online

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Posts: 915
Joined: Mar 2013

Machine: Respironics 560 Auto
Mask Type: Nasal mask
Mask Make & Model: Resmed Mirage FX
Humidifier: Respironics System One (no heated hose)
CPAP Pressure: 08.0-15.0 cm/H2O
CPAP Software: EncoreBasic

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Sex: Male
Location: Texas

Post: #41
RE: Burning Smell
Is there any chance you are swallowing air in the night?

OMM
04-07-2015 05:32 PM
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archangle Offline
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Posts: 3,159
Joined: Feb 2012

Machine: ResMed S9 AutoSet
Mask Type: Nasal pillows
Mask Make & Model: ResMed Swift FX
Humidifier: ResMed S9 H5i
CPAP Pressure: 16-20
CPAP Software: ResScan SleepyHead EncoreBasic

Other Comments: Happy PAPper

Sex: Undisclosed
Location: USA

Post: #42
RE: Burning Smell
(04-07-2015 03:02 PM)cr+mcc Wrote:  I may have discovered the problem. While I was washing the heated air hose I noticed that the middle contact on the electrical connection for the hose was partially blackened. If the black indicates overheating of the pin due to oxidation then that may have caused the smell. It makes sense to bypass the humidifier and heated hose also to see if that helps. I have an new hose so I will also try that to see if the smell does not appear. I did not, upon inspection, see any black on the connector pins on the humidifier unit but if they are damaged I will have to send the unit for repair.

You might try an unheated hose. They're cheaper and you don't need it unless you have a rainout problem.

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04-07-2015 11:54 PM
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cr+mcc
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Post: #43
RE: Burning Smell
(04-07-2015 11:54 PM)archangle Wrote:  
(04-07-2015 03:02 PM)cr+mcc Wrote:  I may have discovered the problem. While I was washing the heated air hose I noticed that the middle contact on the electrical connection for the hose was partially blackened. If the black indicates overheating of the pin due to oxidation then that may have caused the smell. It makes sense to bypass the humidifier and heated hose also to see if that helps. I have an new hose so I will also try that to see if the smell does not appear. I did not, upon inspection, see any black on the connector pins on the humidifier unit but if they are damaged I will have to send the unit for repair.

You might try an unheated hose. They're cheaper and you don't need it unless you have a rainout problem.
Last night I used an unheated hose. I did not notice any burning smell. I am going to continue with the unheated hose for a week to see if the burning smell does not return. There is more moisture at the entry to the cpap mask without the heated hose but it is minor.

RE: OMM: Is there any chance you are swallowing air in the night?
I am not aware that I am swallowing any air. That doesn't seem to be a problem for me. Occasionally my cheeks get a little inflated but it hasn't been a big problem.
Thanks for the suggestions.
04-08-2015 07:44 PM
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DexterK Offline

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Posts: 1
Joined: Aug 2015

Machine: Resmed S9
Mask Type: Full face mask
Mask Make & Model: Resmed Mirage Quattro
Humidifier: S9
CPAP Pressure: 10
CPAP Software: Not using software

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Post: #44
RE: Burning Smell
Old post but I began having the same issue. Really awful smell like electical burning. I don't use a heated hose and always clean my humidifier tank. Don't turn the humidifier settings above 2 either. Checked the filter and everything. Well I'm a computer technician and certified by Dell and Microsoft so I always take electronics apart. I took the main unit of my Resmed S9 all the way down to where I could hold the motor in my hand. I noticed once I got it out that part of the plastic on the motor was slightly broken. My machine has sat in 1 spot ever since I got it so I don't know how or why it's broke. Well I held the motor to my nose and sure enough the smell of the motor is the same as what's coming through my air hose. Despite the fact it works the motor has gone bad. No clear signs of burning but a very loud smell is in the motor itself. Anybody else having the problem will need to do the same as me I suppose and return your unit.
08-31-2015 12:54 AM
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cr+mcc
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Post: #45
RE: Burning Smell
(08-31-2015 12:54 AM)DexterK Wrote:  Old post but I began having the same issue. Really awful smell like electical burning. I don't use a heated hose and always clean my humidifier tank. Don't turn the humidifier settings above 2 either. Checked the filter and everything. Well I'm a computer technician and certified by Dell and Microsoft so I always take electronics apart. I took the main unit of my Resmed S9 all the way down to where I could hold the motor in my hand. I noticed once I got it out that part of the plastic on the motor was slightly broken. My machine has sat in 1 spot ever since I got it so I don't know how or why it's broke. Well I held the motor to my nose and sure enough the smell of the motor is the same as what's coming through my air hose. Despite the fact it works the motor has gone bad. No clear signs of burning but a very loud smell is in the motor itself. Anybody else having the problem will need to do the same as me I suppose and return your unit.

Hi, I am presently using my machine without temperature or humidifier. Rarely I will get a short burst of a burning smell that wakes me then quickly dissipates. I think it is logical that the motor is involved. I have not had the courage to take the unit apart as yet. As I said in an earlier post, I did see evidence of heating on the contacts for the heated hose. That is why I turned off the heater. I would hope that the manufacturers would investigate this better.
08-31-2015 10:21 AM
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JohnJ Offline

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Posts: 1
Joined: Nov 2015

Machine: 2015 Resmed10
Mask Type: Nasal pillows
Mask Make & Model: ResMed 9 and 10
Humidifier: Resmed
CPAP Pressure: 8
CPAP Software: ResScan

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Post: #46
RE: Burning Smell
Yes, I have had the same smell on my machine from ResMed. It is a burning smell. And yes, my reservoir is always full. I am extremely concerned as I do not want to breath in bad fumes.
11-03-2015 02:16 PM
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