I have had 2 rigs with Dometic roof top units and they ALWAYS had that problem when it sat unused for a short length of time. Apply a drop or 2 of 3-n-1 oil right where the shaft goes into the squirrel cage blower, give it a spin and it worked flawlessly until the next time.
I'm pretty sure the motors are sealed.
2011- 351RLTS Eagle, MorRyde suspension/pin box,
2017- F350 6.7 PSD Lariat FX4,SRW, SB,CC
Hughes PWD SP-50A, TST TPMS
Gator roll-up bed cover
B&W Turnover ball, Andersen Ultimate 3220
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