Old age memory may be getting the best of me but I recall a couple of years ago there was an issue with the exterior furnace access panel having the louvers cut wrong allowing rain to get inside and causing issues.
Could that be a contributor to the problem?
Do a forum search on Furnace Louvers and yo will find a bunch of threads on the topic.
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Dave
US Army (Ret)
2020 Entegra Accolade 37TS
2019 Jeep Grand Cherokee Trailhawk (Toad)
FMCA - F432054
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