On multiple occasions now, I have noticed odd things going on with my HVAC system, only to go to the thermostat and find that it has been set to heat! This happened once in the middle of summer, when it was 95+ degrees outside... I came home and the house was burning up! It happened again just last week during a cold snap. No kids in the house, and neither my wife nor I have adjusted the thermostat during the times when it was set to heat... so it's just changing itself. What could possibly be going on? I'm assuming it's a malfunction and I'm just going to replace it, but I wanted to check first.
Incidentally, I leave my pilot light off for my furnace except for November to March. Gotta save those few bucks. So, when the heat comes on, it's just running the system but not actually blowing hot air since the gas is turned off...
