Rockwood Mini 2306 furnace - wont light without cover being open

[jhoppmann]

We took our first trip in our 2306 this past weekend and had some issues with the furnace. When we turned the thermostat to heat and auto and set the temp to an appropriate setting, the furnace fan would blow cold air for about 10 seconds and then nothing. If i took the cover plate off the furnace the burner would light and then seemed to run.

I dont want to have to remove the cover plate every time we want the heat on. Any help would be appreciated. Thanks!

[rockfordroo]

Sounds like the cover may somehow be inhibiting free movement of the sail switch. The sail switch is a plate that is blown open by the fan, which closes an electrical switch. If the sail switch can't move when the fan starts, then the furnace thinks the fan isn't running and it won't light unless it knows the fan is running.