Burn or heat marks on AirSense 10 water reservoir?

CPAPSteve · Post by **CPAPSteve** » Sun Nov 25, 2018 1:10 am

Does anyone else’s reservoir have this problem where there is a burn or heat mark inside the water reservoir? My AirSense 10 was a new unit (replaced under warranty) and I have accumulated 216 run hours on it since I got it. Unit was a new out of factory box unit with all new parts. My previous machine was also new but in the 3.5 months of daily use I never had a brown mark show up in the water tank. Would this be another warranty claim?

Thanks

palerider · Post by **palerider** » Sun Nov 25, 2018 2:33 am

Stainless steel can discolor... I don't know if that's stainless or aluminum. take a magnet to it, stainless is usually very slightly magnetic.

LSAT · Post by **LSAT** » Sun Nov 25, 2018 7:59 am

Did you run it when dry?

CPAPSteve · Post by **CPAPSteve** » Sun Nov 25, 2018 8:03 am

LSAT wrote: ↑
Sun Nov 25, 2018 7:59 am
Did you run it when dry?

Nope not once ever. I tend to overfill my reservoir with more water than I know I will ever need. There is always water left in it each morning. Always have used distilled water.

greatunclebill · Post by **greatunclebill** » Sun Nov 25, 2018 9:16 am

mine has the burn mark too. i ran it dry once or twice and replaced the old one that had a mark. i have not run the new one dry and it also has the mark. my guess is once the hot plate gets a mark or hot spot, it will transfer to new reservoirs over time. having the ability to get a new reservoir periodically from insurance makes it a non-issue for me.

CPAPSteve · Post by **CPAPSteve** » Sun Nov 25, 2018 11:24 am

What is interesting is that my previous machine prior to the cellular modem dying in it was run dry several times and not once did it brown. I am wondering if this is a real issue that should be warrantied where the warming plate has a hot spot that is transferring over into the reservoir.

Seems minor but given the cost of what I paid for this thing that I’d prefer to have a machine that operates perfectly with no issues.

kennethryan · Post by **kennethryan** » Sun Nov 25, 2018 3:50 pm

I have the same burn marks. My AS10 is only a few weeks old, and never run dry (but close a couple times).

There's no reason steel should discolor like that (at least with any temperature short of a welding rig). Maybe there's some sort of coating on the metal? I haven't tried rubbing it off yet ..

ken

palerider · Post by **palerider** » Sun Nov 25, 2018 4:08 pm

CPAPSteve wrote: ↑
Sun Nov 25, 2018 11:24 am
What is interesting is that my previous machine prior to the cellular modem dying in it was run dry several times and not once did it brown. I am wondering if this is a real issue that should be warrantied where the warming plate has a hot spot that is transferring over into the reservoir.

Seems minor but given the cost of what I paid for this thing that I’d prefer to have a machine that operates perfectly with no issues.

Just get a little Bar Keepers Friend and clean it, if it bothers you that much.

palerider · Post by **palerider** » Sun Nov 25, 2018 4:09 pm

kennethryan wrote: ↑
Sun Nov 25, 2018 3:50 pm
There's no reason steel should discolor like that (at least with any temperature short of a welding rig).

Steel heat discolors at far lower temps than 'welding', you get it on steel cookwear all the time.

CPAPSteve · Post by **CPAPSteve** » Sun Nov 25, 2018 9:29 pm

at the end of the day if others are seeing similar marks on their reservoirs then I will assume that my little brown mark is considered normal. It isn't causing any functional issues so I'm not going to bring this up as a warranty issue unless it gets worse or starts melting parts.

Thanks,

Snoregone Conclusion · Post by **Snoregone Conclusion** » Sun Nov 25, 2018 10:20 pm

I see a mark on mine, it’s bigger, but other than cosmetic, seems to make no difference.

chunkyfrog · Post by **chunkyfrog** » Sun Nov 25, 2018 11:21 pm

I get little marks on mine as well.
On my S9, there was a rainbow-colored stain.
All tanks were steel.
Stainless steel is not completely uniform--particularly world-wide.
Discoloration is relatively common.
I suppose that is why they make cleaners for it.

CPAPSteve · Post by **CPAPSteve** » Mon Nov 26, 2018 12:47 am

okay thanks everyone for providing me with your feedback. I can mark that off of my "questions" list for cpaptalk

Cardsfan · Post by **Cardsfan** » Mon Nov 26, 2018 9:15 am

Mine has the same marks too. I just ignore it.

Burn or heat marks on AirSense 10 water reservoir?

Burn or heat marks on AirSense 10 water reservoir?

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Re: Burn or heat marks on AirSense 10 water reservoir?

Re: Burn or heat marks on AirSense 10 water reservoir?

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