Rondo, over the years I have seen many have problems with air winterizing. If you are able to maintain elect. you might just want to bite the bullet and set the heat to come on at 40 and spend the money on propane. This is what I do as Monty is in the backyard and easily supervised and I like to use it in winter. Most days when weather is going to be above freezing, I just turn heat off until I expect it to drop again. Last year it was very cold here and it cost me about $150.00, including travel usage. Just for thought. Larry
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