Prius Mirror Heating Issue

I own a Prius too, and I experienced something similar last winter. Frustrating when you need those mirrors clear. Did this happen suddenly, or have you noticed the heating weakening over time?

It failed completely overnight. Worked perfectly fine one day, then nothing the next. You had the exact same symptoms?

Yes, identical symptoms. Given that it’s sudden, and you suspect wiring, it’s probably beyond my limited skills. Honestly, I took mine straight to a workshop. They diagnosed a faulty connection and sorted it quickly.

Thanks for confirming. Workshop it is then. Got a quote for 95€, which seems reasonable enough. Cheers!