We have a 2001 Starcraft 2408 tent trailer. The furnace (Suburban NT-16SE) has not been able to operate the fan nor ignite the pilot? All other appliances (ie. Fridge, hot water heater, stove) are functioning properly and gas igniting, etc. I have attempted to operate the furnace with a new deep cycle battery and/or plugged into wall, but to no avail nothing will work. All fuses and circuit breaker appear to be fine on the trailer. Also, is there some trick to locating the gas shut off valve anywhere on the unit? The instructor manual diagram displays one, but when I look for it I am unable to locate. Any help would be great. Thanks.