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BengalBus's avatar
BengalBus
Explorer II
Dec 05, 2024

SF42 Furnace Running - will Heat for a few minutes then cold

Our furnace is running/blowing- will blow hot air for a few minutes then turns to cold air.  Propane is working - can light stove burners no issue.  Bypassed sail switch and same issue.  Anyone exper...
BengalBus's avatar
BengalBus
Explorer II
Dec 06, 2024

UPDATE- we are headed to an RV store next Province over to pick up new thermocoupler and Control Board- we think it's the coupler now- but if it's not it would have to be the board- so I may have a control board for sale as they won't accept electronic returns!  I appreciate ALL of your responses and will keep you tuned into whether we are successful!

bid_time's avatar
bid_time
Nomad II
Dec 06, 2024

Just for future information - you just very lightly sand the thermocouple with fine emery cloth to clean it. You can still do that and you’ll have a spare on hand if you ever need it.

  • StirCrazy's avatar
    StirCrazy
    Moderator
    Dec 07, 2024

    doesnt always work, sometimes they are just old enough that the magic leaks out of them haha

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