I have a 2007 Adventurer 37B with triple slides. Iíve looked everywhere for the a/c filter. Itís not under the bed because the whole bed slides out. The air intake is located to the rear of the coach out from under the bed. Anybody has this coach that can help?
Do you have basement air unit or roof air. We have basement air and there is a filter under the bed for the A/C unit. The bed is in the slide out. You have to lift the bed/mattress. There is a small removable panel in the base and the filter is underneath it. Of course that doesn't help with furnace and floor ducts which doesn't have a filter. Perhaps some blockage in the ducts. Too much blockage would shut down the furnace from either overheating or low airflow. Perhaps that just how it works. I would pull the registers and check the duct work best I can. I lot of junk can fall in there during the build process.
Not knowing your floor plan, but look in the pass side rear corner. Under the dresser/desk or what ever is there.
In my MH you remove the dresser drawer. look for a grill.
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Pages 4-14 & 4-15 (50 & 51 of the pdf) of the 2007 Adventurer Operator Manual shows the central AC filter location and specifications. As previously stated by others the furnace does not have a filter.