SEWER SMELL
We have a 2011 Montana 3455. When running the Fantastic fan (with a rear window cracked open)we are getting a sewer smell from the bathroom. This is not all the time the fan is running. Upon furthe...
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Had a similar problem in our previous rv, turned out to be that the sewer stack was close to the bedroom roof vent and the fan was powerful enough to draw the smell back into the fiver from it when both vents were open at the same time and the fan was on full blast.
