Carrier HH79NZ078 Temp Sensor 318172-701 While technically a solid-state speed

While technically a solid-state speed control

It is specifically engineered to handle high-temperature hydronic applications without degrading performance or reliability

but oxidation will eventually require a full component replacement to maintain system reliability

this cast brass water valve modulates flow to maintain setpoint temperatures between 75°F and 135°F

it can be used outdoors if properly protected from the elements and if the vent is positioned to prevent water or debris from entering the diaphragm chamber

Carrier HH79NZ078 Temp Sensor 318172-701 While technically a solid-state speedThe Carrier HH79NZ078 Temp Sensor is a critical thermistor based component engineered for precise temperature monitoring in Carrier and Bryant HVAC systems. Designed for high accuracy feedback, this replacement HVAC sensor interfaces directly with the main control board to regulate system operation based on real time ambient or return air data. Experienced technicians utilize the HH79NZ078 when diagnosing sensor resistance errors or erratic system