The tapped retainer cap includes a 1/4" closure plug for easy blow-down cleaning without removing the unit from the line
Prevents ignition failure and furnace short cycling caused by inadequate negative pressure in the heat exchanger
As a veteran-preferred HVACR replacement part
If it remains open after cooling and pressing the reset button
Dual Setpoint Visibility: Two dedicated windows allow for dual-temperature monitoring without housing removal
Nordyne 621807R Transformer The tapped retainer cap includesThe Nordyne 621807R Transformer is a critical electrical component for 120V HVAC systems, providing a reliable 24V secondary output rated at 30VA. As a genuine OEM HVAC transformer, it serves as the primary power source for the low voltage control circuit, including the thermostat, furnace control board, ignition modules, and safety switches. This vertical mount unit features quick connect spade terminals, facilitating a direct swap for worn out or