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Thread: Inverter Fail
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Old 08-03-2019, 12:34 PM   #5
Raeburn2000
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Brand: Thor Motor Coach
Model: Miramar 32.2
State: Texas
Posts: 46
THOR #14520
Firefly Multiplex Might Be At Fault

There is a known problem on some of the 2019 models related to the Firefly Multiplex System that closely mimics what you have seen. It happened to our Miramar 3-4 times.

Evidently Thor has a fix (upgrade IO control board) now that probably works. Ours is at the dealer now getting the upgrade.

Also be aware that the slides can move on their own while stopped due to this problem. Thor recommended we pull the fuse whenever we are camping.

For the furnace we had to lower the temperature setting down about 10 degrees below actual to get it to turn off.

Hope this helps... Enjoy your trips!
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