Quote:
Originally Posted by Montana2018_345RL
Hello,
This is my 2nd attempt to reply, hoping it goes through this time.
Our 2018 Montana 345RL had a similar issue with short cycling. I read a deep thread on this forum that worked for us. There's a black 15amp fuse amongst the red and blue ones for your furnace and heat pump. Apparently it's a self resetting fuse, so replace it with another standard 15amp fuse. This worked immediately for us.
Hope this helps,
2018Montana_345RL
P.s. Please let us know if it worked for you.
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Dear 2018Montana_345RL. Thanks for feedback.
I did try this fuse but it did not work for me. I ended up replacing the furnace with a Suburban brand out of frustration with the Dometic. Has worked perfectly . Not disappointed in my decision.
These are the items I tried without luck
Disconnected ducts
Changed sail switch and bent it
Changed high and low limit switches
Changed control board
Changed electrode
Changed gas valve
Changed fuse
Changed thermostat
Changed propane regulator
Verified wiring and voltage drops
And Finally
Changed furnace to a suburban model - Then it worked perfectly