Q. 2) (Re- Electric space heaters in above question) A case: The heater is set to go on and off during the course of Yom Tov or Shabbat and a child was playing with the heater while it was on and turned the knob on the heater to “off” position. Once the timer eventually reaches an “off” time, can I turn the knob on the heater back to “on” so that when the timer eventually gets back to an “on” time, the heater will then go on later that same day?
Would there be a difference on Tom Tov vs. Shabbat?
Would there be a difference if my adjustment is made on 1st day Yom Tov, so that it will only go back the next day for 2nd day Yom Tov or the shabbat that follows Yom Tov.
Thanks!

A. Poskim may be lenient when an indirect rabbinical melocho is performed, in case of need with a true shinui such as employing a foot (when it is not usually done so).
Horav Shlomo Miller’s Shlit’a opinion is that you may be lenient in case of great need when the above melochos are performed by a Gentile, even on Shabbos.

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit”a