Conflicting messages here. See this post
Brand: Thor Motor Coach
Model: Axis 24.1
THOR #15551
2018 Thor Axis 24.1 Furnace Operation
One post contacted the furnace mfg and was told there was no adjustment for altitude. I'm going to be checking the furnace for a knob to adjust for elevation now and calling the mfg. But I can tell you at 9000 ft and 24 degrees we got cold!!! (:
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