What do you do (if anything) if you accidentally extinguish the yahrzeit candle flame? Thank you-
If it was extinguished after yom tov, there is no need to do anything about it. If it was extinguished on yom tov, it should be relit. This is aside from the main problem that a flame was extinguished on Yom Tov, which is mileches mechabeh.
Have a healthy winter