I called the HVAC company the day after Christmas.
I told them I didn’t need emergency service, but I needed service.
I was glad the furnace was still giving heat, because it was only eight degrees outside, and it was 2 PM. The problem with the furnace was that it was working overtime. It was eighty-five in the house, and no matter where I set the thermostat, I couldn’t get it any cooler. The person who answered the phone asked if I checked the batteries in the thermostat? I told her I did, and I even had my dad install a new thermostat, but it was in the furnace. The furnace wouldn’t quit running when we installed the new furnace. I was walking around in shorts and a tank top in the winter. I walked out onto the porch to get my mail, and I thought I would freeze to death. It was so hot inside; I forgot how cold it was outside. The wind alone was enough to make me shiver. When the HVAC technician arrived two days later, it was a balmy thirteen degrees outside, but the windchill made it feel like it was negative 24. He walked into the house and immediately took his coat off. I offered to take it, as he headed downstairs to the basement. An hour later, I could feel the difference in the house. He said it was the temperature valve that had quit working. It let the furnace know when it had reached the temperature, and wasn’t allowing the furnace to work with the thermostat.