Blower Does Not Operate- 2100 Series

THIS PROCEDURE MUST BE PERFORMED BY A QUALIFIED TECHNICIAN.

Power to the blower and control circuit for the 2100 Series heaters is supplied through the blue and the blue/black wires in the heater's line voltage wiring harness (umbilical cord). If the display on the heater is illuminated and the room temperature setpoint is higher than the current room temperature, the blower should be operating. If it is not, check for an open 5 amp fuse on the base I/O relay board. If this fuse is open, the most probable causes would include a shorted blower, shorted blower wiring, or damper actuator.

NOTE: If the 5 amp fuse is closed, verify that voltage is present between the L2 240 and blower terminals on the base I/O relay board. With voltage present across these terminals, the blower should be operating. If no voltage present, verify field wiring and check for an open discharge air high limit switch.

Table 1: Motor Resistance

Motor Winding Resistance (ohms / Ω)
Type	120V	240V
Fasco	15-19	60-75
PTech 240V	N/A	175-225
PTech Multi-Tap	40-55	160-210

NOTE: The Fasco blowers were replaced by the PTech blowers starting in December of 2016. The break in serial number for the PTech blowers is 212164337017226SHH. See Part 12 Description - 2100 Series for more information.