Armstrong Air R40403-003 – Fan Timer Blower Control Board

The Armstrong R40403-003 blower control replaces all 40403-001 40403-002 andST9120A B or C blower controls. The R40403-003 blower control providesoutputs for a 2 speed indoor blower motor and single speed inducer motor. Thecontrol receives inputs from the thermostat W Y and G pressure switchand high temperature limit switches. The control also provides user selectableblower delay