Maxitrol TD121 Temperature Selector 30067439-890 Precision Balanced: Factory-balanced to reduce

Precision Balanced: Factory-balanced to reduce vibration

ensuring proper refrigerant subcooling at the expansion device

it is a full furnace pressure switch replacement solution

Key Benefits Universal Compatibility: Includes an adapter to interface with standard Robertshaw and competitive thermocouples and thermopiles

If the switch remains open despite normal temperatures

Maxitrol TD121 Temperature Selector 30067439-890 Precision Balanced: Factory-balanced to reduceThe Maxitrol TD121 Temperature Selector is a critical control component designed for Selectra Series 21 and 31 electronic gas modulation systems. Specifically engineered for make up air heating and indirect fired units with atmospheric burners, this remote selector provides precise setpoint management within a 55 90 degrees F range. Unlike standard thermostats, the TD121 functions as a remote setpoint adjuster, communicating directly with the A1010 or