You need to find where you are losing the 12 volts to the fan. The idea behind the sail switch is, the fan comes and pushes the sail switch closed. Then 12 volts goes to the gas valve and you have ignition. You will never have any gas without the fan. Take a test light and work backward from the fan until you find where you are losing the 12 volts.
1998 Pace Arrow 35 ft. F53 Ford V10 2014 Honda CRV toad
32 years mechanic at Delta Air Lines 15 year motorhome service manager. 3 popups....2 travel trailers....5 motorhomes....loved them all.