I have a little 1500 watt space heater I use in my basement shop. I keep the furnace vents shut year round unless I am doing finishing work in the winter. My furnace is in the basement and keeps the unfinished basement reasonably warm. I will turn it on when I do finishing work to take the chill off the basement during the winter and then and open the HVAC vents. I never leave it plugged in when I am not in the shop. In the summertime I only turn it on when I do finishing to raise the temp above ambient. For some reason it is cycling on and off during the summer. I took it upstairs into the garage and plugged it in on a 75 degree day. It ran fine and did not cycle on and off. The wiring in the shop is reasonably new, installed just for the shop 15-18 years ago.

I can't figure out why it works in my garage, but not in the basement?

Thanks.

Brian