We lost the fuel pump on are 4000 from heat. The onan repairman said it was from the overheating. Thor said there is no overheating problem. Onan said it needs fresh air. Tried to get a door with a vent from thor and was told they could not find one. So I built one and installed my self. Onan also put a seal around the the inside of the door to only let fresh are in from out side the rigg
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