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Had problems with the furnace working in our 2018 Montana High Country 310re. Found Keystone used a 15 amp “self healing” fuze that over-heated and went into an “on/off/reset” cycle. Furnace cycled on/off/on/off uncontrollably. Replaced the fuze with a standard 15 amp fuze. Success for a while. But then we found the 12 volt fuze buss input was enlarged. Seems overheating by constant switching (and possibly too-light 14 gauge wire) made the input too loose to hold fuze securely. Moved fuze and its wire to an unoccupied spot which worked, but changing the entire panel to be safe. It might be only a 12 volt furnace fan, but it pulls a lot of power for its size. High draw can “warp” the fuze receptacle.
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