[Wicked1]

Ok, so starting up a friends RV for an April trip we turn on the thermostat in his Montana, have 2 1/2 bottles of LP, and nothing happens. We swapped out fuses and still nothing. He mentioned end of last season his furnace would turn on click, but not ignite, thought it was due to the warm weather in the summer. I think it may be a sensor, but I am not familiar with the Furnace's Keystone used this year in the Montana.

Any ideas or suggestions would be appreciated.