Had that happen on my Newmar a couple of times. Others have reported the same thing.
Seems it's an Intellitec slide controller issue -- if the controller gets the right kind of transient, the slides start operating.
Myself and others just remove the slide out fuse when slides are not operating. Suggest you do the same.
2004 - 2010 Part Timer (35’ 2004 National RV Sea Breeze 8341 - Workhorse)
2010 - 2021 Full Timer (41’ 2001 Newmar Mountain Aire 4095 DP - Cummins)
2021 - ??? Part Timer (31’ 2001 National RV Sea View 8311 - Ford)
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