If you only have one furnace and it is coming on and heating the rest of the coach, the problem will not be with the heater or thermostat. You could have a loose or crushed vent hose. If you access the furnace and get the model number off of it I can get you owner and service manuals if you still want them.
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Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
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