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Old 12-09-2016, 06:21 PM   #1
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Question Atwood Furnace burner shuts off after 25-30 seconds

I own a 2015 Jayco 29RKS Elite and have experienced a strange situation with the furnace performance. The furnace acts normally when turned on, fan runs, then burner ignites normally, burner then shuts down after about 25-30 seconds. The blower continues to run and then after about 60-90 seconds then burner ignites again for about 25-30 seconds then the burner shuts down, fan continues. This cycle continues until the temperature reaches the setting on the thermostat. Is this a normal condition? Anyone else have this same situation?
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Old 12-09-2016, 06:31 PM   #2
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I just had the same problem with my 2016 27.5 rkds .I looked at the furnace had a loose ground wire and the furnace was out of place. I took it to my jayco dealer and had it fixed free of charge. (under warranty)
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Old 12-09-2016, 10:03 PM   #3
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Quote:
Originally Posted by DennyR View Post
I own a 2015 Jayco 29RKS Elite and have experienced a strange situation with the furnace performance. The furnace acts normally when turned on, fan runs, then burner ignites normally, burner then shuts down after about 25-30 seconds. The blower continues to run and then after about 60-90 seconds then burner ignites again for about 25-30 seconds then the burner shuts down, fan continues. This cycle continues until the temperature reaches the setting on the thermostat. Is this a normal condition? Anyone else have this same situation?
Welcome to the forum.

Another member recently reported his furnace acting in a similar manner. It seemed his, and maybe your, furnace high temperature limit switch is shutting off the burner when the heat exchanger hits the temperature limit. If that's the case, it is not a good situation.

Make sure all your vents are open and clear of rugs, shoes, etc. to get the maximum air flow through the vents and furnace heat exchanger. If that doesn't correct it, you should get the furnace checked out ASAP.

Another possibility is that the high temp limit switch is defective and shutting off the burner too soon.

Hope that helps. Please let us know what you find out.
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Old 12-10-2016, 01:48 AM   #4
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My 2015 has the same issue,been to the dealer 4 times and still not fixed,they replaced sail switch,replaced and adjusted faulty regulator that blew apart internally and re adjusted said sail switch last time it went in,yet it still does the same thing you mention yours is doing,mine is out of warranty now but i spoke with jayco about the issue and they will still cover any repairs til it is fixed properly,so hopefully you can shed some light on yours once its fixed.
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Old 12-09-2017, 06:48 PM   #5
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Old 12-09-2017, 07:08 PM   #6
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If you use the furnace a lot the thermo coupler can get dirty and cause symptoms like this. Its a sensor thats part of the pilot light assembly, when it gets hot it opens the gas flow and allows the pilot to light, if it gets soot buildup it will cause the furnace to cycle on and off. You can take a small piece of sand paper to it to get it all clean. Here is a link so you know what to look for near where the flame is from the pilot, its the small tube on the end.

https://images.homedepot-static.com/...13-64_1000.jpg
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Old 12-09-2017, 07:14 PM   #7
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Quote:
Originally Posted by DennyR View Post
I own a 2015 Jayco 29RKS Elite and have experienced a strange situation with the furnace performance. The furnace acts normally when turned on, fan runs, then burner ignites normally, burner then shuts down after about 25-30 seconds. The blower continues to run and then after about 60-90 seconds then burner ignites again for about 25-30 seconds then the burner shuts down, fan continues. This cycle continues until the temperature reaches the setting on the thermostat. Is this a normal condition? Anyone else have this same situation?

Do you have the fan on high ? Moving more air may stop it from overheating and shutting the burner off. On most there is an electronic ignition no pilot light to light or keep lite.

Good Luck
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Old 12-09-2017, 10:08 PM   #8
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I thought with an electronic ignition, there was still a thermocouple that detects that the flame has lit the gas. If the thermocouple is bad, the control board thinks the gas failed to light after 30 secs and then shuts gas valve.
I think you can jump a thermocouple for a quick test.
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Old 09-20-2018, 03:47 AM   #9
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I'm adding to this thread a bit late in hopes this may help someone. My furnace did this from brand new on our 2017 Seismic 4113. As previously mentioned the furnace would go into an overheat condition and kept cutting out. I checked the warm air temperature with a laser thermometer at the vents when the burner was running and it was too hot. I can't quite recall the maximum temperature allowed but can probably look it up. This is why the furnace kept shutting down. When I removed the panel covering my furnace I noticed that there were spaces for two more vents that could be added and were never installed. As I remember there were only four of a maximum of six vents installed. After installing the remaining two vents my furnace ran cooler and didn't keep shutting down. When I again checked the air flow temperature at the floor vents it was back down within normal operating range. It looked like Jayco installed the thin basement wall tight against the furnace to provide more cargo room which did not allow installation of the last two vents. After installing the remaining vents I moved the wall slightly to accommodate this.
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Old 09-24-2018, 04:45 AM   #10
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Originally Posted by Jethro View Post
I'm adding to this thread a bit late in hopes this may help someone. My furnace did this from brand new on our 2017 Seismic 4113. As previously mentioned the furnace would go into an overheat condition and kept cutting out. I checked the warm air temperature with a laser thermometer at the vents when the burner was running and it was too hot. I can't quite recall the maximum temperature allowed but can probably look it up. This is why the furnace kept shutting down. When I removed the panel covering my furnace I noticed that there were spaces for two more vents that could be added and were never installed. As I remember there were only four of a maximum of six vents installed. After installing the remaining two vents my furnace ran cooler and didn't keep shutting down. When I again checked the air flow temperature at the floor vents it was back down within normal operating range. It looked like Jayco installed the thin basement wall tight against the furnace to provide more cargo room which did not allow installation of the last two vents. After installing the remaining vents I moved the wall slightly to accommodate this.
When you say you added 2 vents did you actually run new duct work or there was duct work there but not hooked up.I haven't taken mine out myself but there is 2 spots on the front of it where it looks like a duct can be installed.other then that it looks like it sits on top of a plenum that distributes it thru the floor vents.I rarely use my heater but when I do it's annoying when it shuts down every 30 seconds then turns back on.its been to the dealer 4 times and they said it's normal its supposed to cycle on and off but I know that's not how a heater is supposed to work
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