in my 30+ yrs of installing and working on all types ventless.. I have never seen a case where a ventless heater, logs consumed enough oxygen in the room to activate the ODS pilot system, and shut the heater / logs down..
I believe the low O2 was the result of a combination of the high altitude (8850'), plus running both the ventless propane heater and the wood stove (without outside air provisions) in the same room. The room is 24x18 vaulted ceiling and with a ceiling fan. At any rate, cracking a window seemed to solve the problem after a few minutes. I have only seen this happen maybe once or twice in 12 years, although we are only there for about two weeks at a time every few months.
And kenmac, thanks for posting the link to the explanation of how the ODS works. If you have any thoughts or suggestions re this potential problem, I would appreciate your insight.
you are most welcome.. It's really hard to diagnose from behind a computer screen, but I would look at the pilot assy, or maybe a regulator / supply issue.
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last week my MIL called and said her propane logs work sometimes, and sometimes not..I already know,,I'm not getting paid for this job.
So, I go ,and check out the pilot on the logs is very low,, I go check her propane furnace,, furnace cycles on for a few min. then goes off..
I now know that she doesn't just have an issue with her propane logs...
Long story short.. The little pig tail line that comes off her large propane tank was stopped up..It was a small enough opening to allow enough propane to fill the gas line with nothing on.. As soon as her furnace kicked on ,and used up what was in the supply line, it would shut down the pilot on her logs, because no more gas was in the line.. With everything off ,, the gas would build up in the line again, until the furnace came on again ,and uses up all the gas.
I cleaned out the pigtail, checked the gas flow at the furnace,, MIL is now a happy camper..
Guess I'll just have to right this repair off on my taxes !