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Open Roads Forum  >  General RVing Issues

 > Furnace flames cycles off before temp is reached

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Chief Bob

Iola, Texas

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Posted: 11/07/21 09:27am Link  |  Quote  |  Print  |  Notify Moderator

Thanks all. The furnace is an Atwood. I’m touring bourbon distilleries in Kentucky today so I’ll have to get the model tonight. We should be out of the freezing overnight temperatures for the rest of the trip so hopefully we’ll get by with the heat pumps. I’ll pull things apart and check for obstructions when we get home. I always count on this forum for good advice and direction.


Bob Leiper
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Iola, TX
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time2roll

Southern California

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Posted: 11/07/21 09:33am Link  |  Quote  |  Print  |  Notify Moderator

I added two new ducts to increase airflow. Burner cycled about every 3 minutes before, runs continuous now until the thermostat is satisfied. Provides more heat also.


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Grit dog

Black Diamond, WA

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Posted: 11/07/21 10:57am Link  |  Quote  |  Print  |  Notify Moderator

^Very helpful.


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JimK-NY

NY

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Posted: 11/07/21 12:11pm Link  |  Quote  |  Print  |  Notify Moderator

Mine also runs about 10 minutes, then the flame cuts out for a few minutes and the cycle begins again until finally reaching the temperature set by the thermostat. This is something I hardly notice unless the temperature is cold and I am impatient for the heat.

wildtoad

Blythewood, SC

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Posted: 11/07/21 03:06pm Link  |  Quote  |  Print  |  Notify Moderator

Chief Bob wrote:

Thanks all. The furnace is an Atwood. I’m touring bourbon distilleries in Kentucky today so I’ll have to get the model tonight. We should be out of the freezing overnight temperatures for the rest of the trip so hopefully we’ll get by with the heat pumps. I’ll pull things apart and check for obstructions when we get home. I always count on this forum for good advice and direction.


Make sure you go by Buffalo Trace.


Tom Wilds
Blythewood, SC
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Chief Bob

Iola, Texas

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Posted: 11/07/21 04:09pm Link  |  Quote  |  Print  |  Notify Moderator

The furnace is an Atwood 35,000 btu model AFMD35151.

C Schomer

Pueblo West, Co.

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Posted: 11/08/21 12:44pm Link  |  Quote  |  Print  |  Notify Moderator

I'd use a meter and determine what's doing the cycling, first, stat or hi limit. Check the temp rise. I've never had short cycling problems with my RV furnaces but I like to see no more than 70* degrees rise in a res. furnace, when the airflow is really good. Make sure the flex ducts aren't kinked, stat in warm air current, clean the blower wheel, dragging motor, etc... normal checks and maintenance. Craig

Grit dog

Black Diamond, WA

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Posted: 11/08/21 12:53pm Link  |  Quote  |  Print  |  Notify Moderator

Chief Bob wrote:

Thanks all. I’m touring bourbon distilleries in Kentucky today so I’ll have to get the model tonight .


I wouldn’t be able to read a street sign or type my own name after touring bourbon distilleries!!

Chief Bob

Iola, Texas

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Posted: 11/08/21 05:21pm Link  |  Quote  |  Print  |  Notify Moderator

One thing I have been able check on the road is that when the flame short cycles the thermostat is still calling for heat. Thanks

enblethen

Moses Lake, WA

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Posted: 11/08/21 05:36pm Link  |  Quote  |  Print  |  Notify Moderator

Could be as easy as a loose connection within the furnace. Heats up and goes open!


Bud
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