JimK-NY wrote:
This topic has come up several times in the past. Some responses have recommended checking the ductwork to be sure there are no restrictions.
I am of the opinion that this is normal operation for some RVs and for some furnaces. My burner definitely cycles on and off numerous times when raising the RV temperature by several degrees. This has always been the case and my rig is almost 20 years old. I have never timed the cycles but I think the burner probably runs for 3 or 4 minutes and then blows air for almost that same period of time before the burner starts again.
I am not sure I would call short burner cycle "normal", none of the RVs I have had have done that.. My current TT I have taken the temp from 40F to 70F and never once had the burner turn off.
Perhaps normal for yours if the RV manufacturer did not follow the furnace manufacturers minimum ducting requirements which would not be unusual..
Furnace manufacturers do list cold air return minimum opening and also minimum hot air outlet requirements in square inches for each BTU size of furnace.. Wouldn't surprise me if the RV manufacturer failed to follow or exceed the minimums..
