DISASSEMBLE/ASSEMBLE/TEST BLOWER MOTOR (CONT)
Be sure fuel to burner head is shut off during this test.
Disconnect fuel pump plug at EXTERNAL FUEL PUMP. RECEPTACLE (3).
Disconnect fuel solenoid (4).
Connect power cable to POWER RECEPTACLE (5).
Push inflating needle into combustion blower air duct (6) between blower and burner head
Turn HEATER-OFF-FAN switch to HEATER. Allow blower to attain full speed.
Put end of hose in water.
Push hose deeper under surface until bubbling just stops. Measure
length of hose that is submerged, This length must be at least 15 inches. If length is less than
15 inches, repair or replace blower motor.
Refer to REMOVE/lNSTALL COMBUSTION
BLOWER AND HOUSING, page 4-40, and REPAIR BLOWER MOTOR, following this task.