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I believe on your unit you have a carpeted engine cover on the forward firewall that is in between the driver's and passenger seat. The engine sits up front under this cover, the engine will produce a large amount of heat and I would say the floor getting warm in this area is normal. IF you have any other questions or concerns please feel free to contact me...
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RV Mechanic
10 Years RV experience... Cummins North West, Country Coach, Monaco Coach, Vendor certs.