Agree with other post, you are either out of propane or the sail switch is not allowing the gas valve to open. If the stove is not working either, then the tanks are empty, valves are closed or the change-over switch is in the wrong position. If the stove is working, then most likely the problem is with the sail switch. Are you hooked up to shore power and are the 12 volt lights full brightness? If not, then battery voltage is low and the blower is not running at full RPMs to turn the sail switch on. Another possibility is restrictions in the intake air duct and/or the blower motor, maybe spider webs or wasps nests. Call a local RV dealer to ask about a mobile RV tech. Assuming you do have shore power, go to Walmart and get a small electric heater, just don't run it on the highest setting as it will likely kick the breaker.
Texas Baptist Men-Retiree Builders member since '01
13 Silverado 3500HD D/A, 2wd CCSB srw, custom RKI bed
11 Cruiser CF32MK