Thermostat not cycling

[Bandit7]

I have a Rockwood 2703SS
When we first started the furnace/air it clicked on fine but when it reached it's temp & shut down it would not come back on when the temp got colder in the camper. Took the thermostat cover off & there is a glass fuse that I replaced & worked fine for that initial turn on but would not cycle again. When I went to pull the glass fuse out I used a butterknife because that's all I had handy, when I touched the connections when pulling out the fuse the furnace/air would work

If I keep the fuse in & use some type of metal piece touching it the unit will run. It's weird & I can't figure it out

[OldCoot]

Are you saying you use something metal to hold the fuse in the holder?

[cfsoistman]

Either there's a short in the low voltage wires causing the fuse to blow or the fuse you have is not rated high enough for the circuit.

[Bandit7]

It's not really holding the fuse in, it's touching the fuse & the connections at the same time. Hard to explain

[OldCoot]

Maybe a picture would help.

[Bandit7]

It is at a campground right now but will try to get a pix this weekend

Thx