The Honeywell LR1620 is an older thermostat that is only used to control the central heating system. They are connected to baseboard heaters or other electric heat sources. There is one dial that is turned to change the temperature in the room or house. They are simple to operate.
Place your hand on the Honeywell LR1620 thermostat dial. Turn the dial to your desired temperature.
Turn the dial clockwise to increase the temperature.
Turn the dial counter clockwise to decrease the temperature.