Welcome to the forum. I am not familiar with your coach specifically but we can ask some basic questions to get started:
Firstly, is your fridge an RV (propane/electric) or a residential model? I am going to assume its an RV fridge so it can run on either propane or shore power (AC). Does it fail to work on either propane or shore power (AC) or both? Make sure it is set for Auto mode so it will automatically default to shore power when hooked up; and when off shore power it should fall back to propane operation automatically. Just so you know you should have your use/store switch in the use position when using the fridge as the 12vdc systems typically also need to be on.
Regarding the furnace.... The fan runs OK, but do you hear it trying to spark ignite the propane? Does your propane stove light and work properly? If yes that means gas is available in the tank; its turned on and gas lines are purged of any air. After three failed attempts to light the furnace may go into lock out mode and may need to be turned off and on again to reset it; then it will try again when there is a call for heat from the thermostat.
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