Here’s my furnace panel leak solution
I took my Thor Challenger to the Wakarusa plant TWICE to get a similar leak fixed. Rain water would get onto the furnace circuit board and cause erratic operation. Technicians actually replaced the access panel and bezel (new paint and all), but the leak continued.
I finally determined that water was entering through the seam between the panel and the bezel... specifically around the six screws that hold the panel in place. The foam gasket inside the panel did not make proper contact in those six areas allowing water to enter the furnace compartment.
Eventually, I put clear tape over the top and side seams. It worked... but was a clumsy, unattractive solution.
A month ago, I removed the tape and pushed some small diameter plastic spline (the kind used to secure screen material to a screen door) into the seam with a rolling spline tool. This solution is nearly invisible, and the spline can be easily removed/replaced if needed. Since then, the Challenger has been exposed to several driving rainstorms, but there have been no more leaks!
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Roger, Sherrill, and Harley (Great Dane)
2016 Thor Challenger 37KT
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