Honeywell Lr1620 Wiring Diagram. Web wiring diagram for honeywell lr1620 thermostat fixya. Web wiring diagram for honeywell lr1620 thermostat fixya. Wiring Diagram For Honeywell Lr1620 Heating Wiring Diagram from wiringdiagram.2bitboer.com Web web i have a very old honeywell lr1620, with no identifying letters at the terminal connections. You wire a ct87n by using letter. This […]