I have a Sears Model 42-91961, Type no. W-R 1F80-82 automatic thermostat control for my heating/air system. It was installed by the former owner who didn't leave the manual. I had to replace the batteries this morning and I don't think I did something correct as the air conditioner is running non-stop. NO, it isn't the heat and I had it on a manual temp change mode before where I could raise or lower the temp when I needed it. I need to manual to know how to reprogram it. Dixie Gilson