always test the relay when replacing the 11972

While the base AFRB24 is an on/off model

Optimized Airflow Control: Reduces hysteresis in the damper linkage

providing stable switching for low-voltage control systems and protecting sensitive downstream electronics from voltage irregularities

Can I use this on a cold-start boiler

Carrier 06EA660167 Crankcase Heater 319825-402 always test the relay whenThe Carrier 06EA660167 Crankcase Heater is a critical OEM replacement part engineered for high performance compressor protection in residential and light commercial HVAC systems. This insertion type crankcase heater operates at 115V and delivers 180W of consistent thermal energy to the compressor oil reservoir. By maintaining a temperature higher than the coldest part of the system, it effectively prevents liquid refrigerant migration into the