Carrier HH680610 Step Controller 321702-401 This 24Vac electronic temperature control

This 24Vac electronic temperature control features a setpoint range of -30 to 130°F

For technicians troubleshooting intermittent fan failures or high-amp draws

Will this work with other unit heater brands

one-piece steel motor shaft and a flame-retardant thermal plastic housing to ensure durability in high-moisture environments

Using genuine Rheem replacement parts ensures that the millivolt signal remains within the manufacturer’s specified range

Carrier HH680610 Step Controller 321702-401 This 24Vac electronic temperature controlThe Carrier HH680610 Step Controller is a critical Factory Authorized Part designed to manage the staging sequence in multi stage heating and cooling equipment. As a high precision HVAC step controller, it facilitates incremental capacity adjustments by activating small heating or cooling stages based on real time temperature fluctuations. This sophisticated modulation prevents system short cycling and optimizes energy consumption across multi stage