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fairlaniac's avatar
fairlaniac
Explorer
Nov 12, 2018

Help with floor ducted furnace, lack of air flow

We have a seasonal travel trailer at a site in Delaware. We went down from PA this weekend to winterize. Spent the night Saturday only to realize over night the furnace wasn't operating properly. the unit would kick in and it sounded normal with the fan motor but there was very little air flow from the floor ducts. The registers were warm but no real air flow. So I assumed since I heard the fan motor that I might have a blockage. The furnace is under the sink counter. I didn't take time to resolve or dive into the issue as we had to leave early to come home. So I took these pictures. It's all I can see from three vantage points. I'll assume by what I see is there must be a opening on the bottom of the unit that lines up with a hole in the floor to the duct work? Are these fastened to the floor or just sitting there? The one end is against the inside wall of the trailer which is the exhaust to the outside. Then it sits on the floor. I'd like to plan on pulling the unit out but I'm not sure what to expect? Are there any diagrams with typical floor duct installation that I could look at? We bought the trailer used and there are not manuals for any appliances. So I'm not even sure of the manufacturer of this? I know I'm not providing much info but that is all I got from the limited time available. Thanks!


  • Sounds like one of your air ducts might have separated and not allowing the full air flow. Instead, it's blowing under the floor. More than likely, the age of your trailer, the air ducts are that soft aluminum ducts, not the plastic stuff wrapped around a wire spring.

    I had a 2006 Springdale, 31 feet long, and it had weak air flow from the beginning, because I'm pretty sure the main line running down the middle of the floor was pinched and squished. I was able to run a very long vacuum hose down the duct and found a spot where it wouldn't pass. I kept working the hose. I think the hose eventually pushed its way through the crumpled part, because after that it started blowing better.

    I also learned the junction points were just simply taped to hold them together. So, it's possible yours separated somewhere. The tape finally deteriorated.

    I'm assuming it blew stronger in the past?

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