Good afternoon,,,,another thread in this forum suggests you check your femote fan setting on the AC remote,,,,needs to be on A,,,rather than o. If you haven’t solved your question here are a couple of suggestions,,,,,🌞 2 possible issues come to mind if your propane tank has fuel. 1). check outdoor panel where pilot light for refer is & make certain the pilot light location is not blocked w debris,,,,small brush or lite air can help solve if blockage; (2). Often, once a trailer has sat awhile w/o propane use, the propane line develops an air pocket. The solution for this is to turn off the propane tank & any propane gas appliance ( refer,,,stove top,,,hot water heater) then slowly turn it back on again before you attempt to start one appliance,,,it may take a few tries but the appliance will attempt to ignite the propane. If it is quiet you can here the igniter clicking as it tries to light the propane,,,& if it ignites you can hear the burner operating,,,The main tank may shutdown after 3-4 tries,,built in safety feature,,,,so you may need to repeat the process but after a couple of resets,,,it should fire up.
TIP: If you turn everything on inside at once the propane draw wb too great & that may also cause the main tank shutoff, so it is best to try & ignite only 1 appliance at a time,,,,then 1 more at a time.. If it is not that may be a faulty propane regulatorr or your line so where may have a leak. Have had 1st hand experience w both issues in the past & was able to solve our issues using these RV tech suggestions. Other members will also have some valuable input or suggestions. Believe there are also existing threads in the forums that have suggestions that may help.
NOTE: REMINDER: All the while please remember to have adequate ventilation safeguards working ( open window, door, exhaust fan,) Good luck,,,,🍀👍