As long as the small PCB is $40 it's fine. I had a central vacuum fail like that a couple of years ago, and the small PCB would have cost $350.

The PCB had already been replaced twice during the warranty period. Googled the major components and they were $3 - $5 a piece, just a couple of half bridge rectifiers, resistors and diodes.

Didn't want to risk a fire from a DIY job, which would have definitely voided my insurance, so I spent $400 on a new central vacuum unit (from a different brand).