Furnace Cycling - SOLUTION w/ Pictures
EDIT: This turned out to be an air flow issue. The solution was quite simple. The furnace has three knockouts on the back when using flexible vent duct adapted to hard in-floor ducting. Crossroads has...
Forum Discussion
smkettner wrote:Taz 23 wrote:
It is normal for the burner to cycle on and off during the heat clcle on newer rv furnaces. this is especially noticable during colder weather as the furnace will need to run longer and more often to keep the rv warm. When staring up the blower will come on for about 15 to 30 seconds before the furnace ignites. Then the burner will run long enough to get the heat exchanger hot and shut off while the blower continues to push air over the hot heat exchanger (still warming the coach). When the heat exchanger cools down the burner will relite to once again heat up the heat exchanger. This will go on until the right temperature is reached or you shut off the furnace.
You may also have an issue if this seems normal.
IMO the builders are shooting for the minimum required size ducting. Then any restriction becomes inadequate venting. I think mine calls for 24 sq inch duct so natually 12 x 2 should be fine on paper :R
X2
Very true… check your installation/owner’s manual it will require different amounts of air volume for different size furnaces it may dictate and the number of outlets downstream to…
I’m not completely sure the mfg.’s read the instructions even…
