Hoover PowerMAX Service Instructions Manual page 19

V. Troubleshooting check list - Spectrum/PowerMAX
This section is intended as a guide to help further diagnose a possible problem related to the
electrical system in Spectrum/PowerMAX models that have a power light, rheostat, and speed
control.
Problem Possible Cause
A, Motor 1, Hose not connected.
won't run
2. Speed control failed.
B. Motor runs
in high
speed -
shuts off in
low speed
C. Power
nozzle runs,
cleaner motor
doesn't
(Modal S3585
only)
D. Units runs, 1.
power nozzle
doesn't
(models
$3595, S3605
only)
E. Power nozzle 1.
won't run.
(PowerMAX)
Possible Solution
1. Connect hose and check operation.
3. Power takeoff bad or leads not
connected properly.
4. On/off switch on hose bad.
5. Thermal protector failed (PMAX)
2, Replace motor retainer assembly, The speed
control is incorporated in this assembly. The
yellow lead on the replacement speed control
incorporates a resistor, Remove the entire
yellow lead back to the insulated terminal
when removing the old motor retainer
assembly.
3, Remake connections and/or replace
power takeoff.
4. Replace switch.
5. Replace,
1. Failed speed control resistor
(yellow lead).
2. Bad rheostat.
1. Replace motor retainer assembly.
Note: Motor cover, speed control, and
resistor replaced as an assembly.
2. Replace rheostat.
1. On/off switch on hose bad.
1. Replace switch.
Switch on hose bad.
1. Replace switch.
Switch on hose bad. 1. Replace switch.