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Old 04-21-2021, 01:24 PM   #1
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Oasis occasional flame out

Our oasis system has been having a flame out intermittently. Once in awhile it will start up and run for a few seconds, then flame out and let out a bunch of smelly smoke, then again it will start up and run for a few seconds then flame out and smoke again. When trying to restart it at that time it keeps having the same issue, but often times after being switched off overnight or for an extended period of time, we have been able to try it again and it works fine. It then keeps working fine for maybe 4 to 7 ish days, then it may have the issue again.

All of that described above happens when plugged in.

But the next issue we have is when not plugged in and running the oasis it will do the same runs for a few seconds and flame out and smell etc. as described above, but it does it very predictably when the battery voltage drops below 12.2 or 12.3 volts as read at the inverter control panel. It is the flame out error, not the voltage error, but it seems to happen at a lower voltage. If you ask me that is not normal that it wont work below 12.3 volts, everything else in the coach works fine down to 11.5. It then starts working again after starting the generator and letting the batteries charge for a few minutes.

Has anyone had an experience like this or have any ideas what could be causing this? Considering it happens below a certain voltage and unpredictably sometimes even when plugged in?
I read another thread where someone stated their air compressor was running intermittantly causing a flame out, I beleive that this may be a probable cause. Maybe the air compressor doesn't run well if the voltage is low, as well as intermittantly otherwise... Also I am curious if the fact it emits odorous smoke means anything as to what may be happening... Would that hint at air issue versus fuel issue? What are your thoughts....

Thought I would see what some of your thoughts are given the specifics of the situation.

Thanks.
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Old 04-21-2021, 02:31 PM   #2
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Quote:
Originally Posted by caleb1 View Post
Our oasis system has been having a flame out intermittently. Once in awhile it will start up and run for a few seconds, then flame out and let out a bunch of smelly smoke, then again it will start up and run for a few seconds then flame out and smoke again. When trying to restart it at that time it keeps having the same issue, but often times after being switched off overnight or for an extended period of time, we have been able to try it again and it works fine. It then keeps working fine for maybe 4 to 7 ish days, then it may have the issue again.

All of that described above happens when plugged in.

But the next issue we have is when not plugged in and running the oasis it will do the same runs for a few seconds and flame out and smell etc. as described above, but it does it very predictably when the battery voltage drops below 12.2 or 12.3 volts as read at the inverter control panel. It is the flame out error, not the voltage error, but it seems to happen at a lower voltage. If you ask me that is not normal that it wont work below 12.3 volts, everything else in the coach works fine down to 11.5. It then starts working again after starting the generator and letting the batteries charge for a few minutes.

Has anyone had an experience like this or have any ideas what could be causing this? Considering it happens below a certain voltage and unpredictably sometimes even when plugged in?
I read another thread where someone stated their air compressor was running intermittantly causing a flame out, I beleive that this may be a probable cause. Maybe the air compressor doesn't run well if the voltage is low, as well as intermittantly otherwise... Also I am curious if the fact it emits odorous smoke means anything as to what may be happening... Would that hint at air issue versus fuel issue? What are your thoughts....

Thought I would see what some of your thoughts are given the specifics of the situation.

Thanks.

I would remove the front cover and disassemble the nozzle assembly and give it a thorough cleaning. Won't take but 15 minutes, tops. See if that helps. The smoking is why I think it may be dirty. -Paul
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Old 04-21-2021, 02:40 PM   #3
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I would remove the front cover and disassemble the nozzle assembly and give it a thorough cleaning. Won't take but 15 minutes, tops. See if that helps. The smoking is why I think it may be dirty. -Paul
Thanks for the reply Paul.

We did remove that assembly and everything was nice and clean. Being dirty would make sense and that was one of our suspicions, but apparently not the problem.
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Old 04-21-2021, 05:43 PM   #4
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Nozzle is probably clogged. When was your last service on it?
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Old 04-21-2021, 05:52 PM   #5
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This happen to me it was a torn diaphragm.
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Old 04-21-2021, 07:12 PM   #6
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I would check the voltage at the Oasis unit with a meter. The voltage may be lower at the compressor than you are reading on the batteries. This is from the Oasis service manual.
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Old 04-21-2021, 07:34 PM   #7
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After watching the service video on the Oasis, it appears to be much simpler than my Aqua Hot. Any idea on the parts costs for the items replaced?
Also I am a bit confused about the air filter. Is this some type air injection for the burner chamber?
Thanks
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Old 04-22-2021, 04:50 AM   #8
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Nozzle is probably clogged. When was your last service on it?
It has been awhile since the nozzle has been changed, probably more than a year, but like I said we took it out and it was visibly clean.
Do the nozzles get dirty internally that can't be noticed simply from looking at it? hence why they need to be changed each year even if they look clean....
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Old 04-22-2021, 06:41 AM   #9
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I was getting flame outs on my Oasis. The air filter was slightly loose causing the Oasis to suck just enough extra air to cause a flame out. After I tightened it everything worked.
When you have have the fuel nozzle out like in the picture you can start the Oasis and you should see a fine stream of fuel. This is one of the troubleshooting steps ITR had me do.
Look in your manual for any further troubleshooting steps. Call ITR as they are excellent to work with.
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Old 04-22-2021, 08:27 AM   #10
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There is a sintered brass filter behind the nozzle. Doesn't take much to clog and it will look clean. I would try the annual service first. Check the tips of the igniter as well. My machine will fire then flame out and smoke pretty bad when the nozzle plugs up. Happens every year like clockwork
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Old 04-26-2021, 09:33 AM   #11
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Fixed mine

At the end of our 3 month winter tour of texas I was getting the "flame out" error with the smoke. The first time I saw it I grabbed the fire extinguisher and rushed outside to put out the fire!! I ordered a one year maintenance kit (which was backordered) so in the interim I installed a new fuel filter and that solved the problem. Replacing the fuel filter is easy for nearly anyone.

Good luck.
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Old 04-27-2021, 06:27 AM   #12
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Thanks for the replies. I think you all have convinced me to try an annual service before replacing an expensive part like the compressor.
I will keep you updated as to how it goes.
Thanks again for the help
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Old 04-27-2021, 06:40 AM   #13
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Had the same problem. The igniter was not indexed correctly should be flat when viewed from the front
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Old 04-28-2021, 05:34 AM   #14
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Quote:
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Had the same problem. The igniter was not indexed correctly should be flat when viewed from the front
Interesting. Will check that.
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