Update...just in case anyone else is having problems with the AC/Heater fan on their F53 chassis motorhome. I just picked my Miramar up from the local Ford dealer...they could not repair it. They replaced the fuse twice but each time they turned the fan above the lowest setting it would burn out the fuse. They deemed it to be a Thor issue. I called the dealer and he said they have had lots of issues with these. They usually find the problem in the wiring so I have to take it in. I'll let you know what they find if anyone is interested.
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