Forum Discussion

Kayli_s_Papa's avatar
Kayli_s_Papa
Explorer
Feb 27, 2021

2018 Jayco Pinnacle 36KPTS Furnace Problems

I have a Atwood furnace installed in my Jayco Pinnacle 36 KPTS 5th wheel furnace Model # AFLD40121 40,000 BTU . The breaker on top of the case constantly trips necessitating me having to take apart the partition in the basement to reset it. When tripped the the furnace doesn't run. It then cycles 1 time and will trip again . I have had it to a repair shop and they said they replaced the breaker , ran it out the 5th wheel and couldn't find the problem. Suggestion was to look for collapsed ducting for the problem. I verified that the ducts are not the issue . Talked to Atwood technical support and the didn't have a answer.
I know this is not an isolated problem due to many YouTube subscribers identifying/discussing the same issue. I am aware that the location of the furnace generates greater than normal temperatures in the space.
Is there a fix or a known identifiable problem that I can be made aware of?
I'll look forward to any response Thank you.
  • Old-Biscuit's avatar
    Old-Biscuit
    Explorer III
    Feb 28, 2021
    Run furnace and while running take voltage readings on DC Supply and AMP draw on motor circuit...

    That On/Off CB should be rated for 15A
    Trips if motor draws more then 15A
    **Motor failing, air wheels binding, low dc voltage....high amp draw
  • Kayli_s_Papa's avatar
    Kayli_s_Papa
    Explorer
    Feb 28, 2021
    Thank you for the information. The repair shop stated that there is nothing wrong with the breaker/switch or the furnace its self. They went as far as to replace the breaker with no success. They stated amp draw is with in normal specs. As well as all the other components. That's what confuses me.
  • Old-Biscuit's avatar
    Old-Biscuit
    Explorer III
    Feb 28, 2021
    The On/Off Switch is also a circuit breaker
    On/Off function is so DC can be turned off locally when working on furnace

    The circuit breaker is actually a re-settable heat sensitive device designed to protect the blower motor.
    In a furnace, this heat evidences itself in the form of an amp draw.

    The breakers used are externally mounted and are of a slow
    blow style.
    This means that due to their location on our furnaces, the heat
    of the furnace cannot affect their operation.

    Likewise, short amperage spikes will not cause them to trip either.

    The motor will have to produce an excessive and prolonged amperage draw to trip it.
    When a circuit breaker trips, it does so because a problem exists.

    After resetting it, voltage and amperage draws should be taken to determine where the problem is.
    These readings will determine if you have a power source, breaker or
    motor problem.

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