Suburan furnace?
Six year old Surburan 42K BTU. Replaced computer board once and blower motor 3 times. Noticed last night it seems the high limit switch is acting up. During a normal cycle, burner will ignite on and...
Forum Discussion
IOWASTROKER wrote:
lAST set of brushes in the motor got so hot, they were melted to the armature. I have read about adding another duct. Did put heat to my water manifold bay off main trunk, but I surely can add another. Plan to replace the dual stage regulator this AM, then move to the big propane tank and replace that one also. THX ...again everybody. Have a great TG. Johnny in chilly Iowa 23 degrees currently.
If the motor got that hot, and your heat exchanger cracked I would suspect an airflow issue. Does it cycle on the high limit when it works? How hot is the supply air at the registers? Easiest thing to do is put a thermometer in a supply and watch what it does, that's how I found out my airflow was too low, it cycled on the high limit and never warmed up the trailer. I added another supply grille/duct and fixed the issue.
