A 2-pole contactor like the 42-25102-01 breaks both "hot" legs of the circuit

The Watts 909 series is known for its "no special tools" design

including common configurations like the TCD120 and TCD102 models

The stacked design allows for multiple circuits to be controlled in a compact footprint

You must verify that your furnace model supports dual-stage firing to ensure the 24V signals are sent correctly to the high and low-stage solenoids

Intermatic T104R Timer 30067439-890 A 2-pole contactor like theThe Intermatic T104R Timer is a 24 hour mechanical time switch engineered for heavy duty industrial and commercial applications. This DPST (Double Pole Single Throw) unit is designed for 208 277V electrical systems and is housed in a rugged NEMA 3R case, ensuring reliable performance in both indoor and outdoor environments. As a professional grade solution, the T104 is the direct replacement for 1104 models, allowing for a seamless transition without