 So if it's 100 degrees out, setting your thermostat to 65 is just going to waste energy and run up your power bill. Jeffries also recommends not using your oven or your dishwasher or doing laundry when it's hot like this. Maxine Frost, Northwest News Radio. It's now 740. I'm checking with Bill Swartz for a week in plumbing sports update. Two Yanks crashing the England's tennis party.