this 140-170F limit switch opens the control circuit when temperatures exceed the 170°F threshold and closes once they drop back to the 140°F range

it provides consistent high-speed torque and reliable clockwise (CW) rotation under heavy thermal loads

ensuring a long-term

providing the narrow tolerances required for modern furnace control boards to sense proper airflow

often caused by coil burnout or high resistance at the contact points

Johnson Controls TM-2151-0000 Temperature Module 320788-704 this 140-170F limit switch opensJohnson Controls TM 2151 0000 Temperature Module, Temperature Output with Occupancy Override, 5 Vdc Power Requirements, Wallbox Mount