So i just found out today that my remote can control my portable heater and i was really excited. I was watching tv and decided that i was cold so i went to the activity i set up for the heater and activated it.

after i pressed the button it turned on the heater no problem but it also turned off my tv and AV reciever. How can i set it so that i can control my heater without affecting my other activities?

thanks in advance