Not a lawyer but I don't think home repairs void most home insurances in common law countries unless you are working with parts that are particularly dangerous, part of a safety system to protect others, and/or absolutely require a skilled professional.
I'm pretty sure that if a fire starts in my central vacuum unit, and my insurance company does an investigation that finds a DIY swap of power electronics components in that unit, I would at the very least be in a lengthy legal battle to get any money back.
That’s not true in the US, which is what the post above yours was trying to explain.
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).