The first time the furnace is run, it may take a few times to get gas to it to light. After a few failed tries, it will go into safety shutdown and not try again until you reset it by shutting it off. Wait a few minutes. Then set thermostat to AUTO ( not high or low) and try again. As mentioned, you should hear the furnace lighter clicking (outside near furnace door). The fan should come on as soon as it calls for heat after a short run, the furnace should try to light. If this is the first time running the furnace or first time in a while it may take a few tries.
2015 Freedom Express 248RBS
TV 2015 Silverado HD2500 Duramax
TST Tire Monitors
Honda 2000I + Companion
2 65W solar panels