Microwave Troubleshooting Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death: disconnect power to oven before servicing, unless
testing requires it.
12
16022821 Rev. 0
©2004 Maytag Appliances Company
CONDITION
CHECK
RESUL
CAUSE
REMEDY
1. Fuse blows.
Continuity.
No continuity.
Continuity.
Shorted contact at
the primary switch.
Replace fuse,
primary, monitor,
P.C.B Assembly.
No continuity.
Failed high
voltage capacitor.
Replace high
voltage capacitor.
Fuse blows again
Normal.
Failed high voltage
transformer.
Replace high
voltage
transformer.
Malfunction of the
monitor switch.
Replace fuse,
primary, monitor,
P.C.B Assembly.
Check continuity
of monitor
switch (with
door closed).
Check continuity
of primary switch
and door sensing
switch (with door
opened)
Disconnect one
side of the wire
lead connected
from transformer
to the high voltage
capacitor and
operate the unit.
Replace fuse
2. Fuse does
not blow.
No continuity.
Continuity.
No continuity.
Failed power
supply cord.
Replace power
supply cord.
Failed
thermostat.
Replace
thermostat.
Check continuity
of thermostat.
Check continuity
of power supply
cord.
