This Job Aid, “Whirlpool Microwave Oven Hood Combination,” (Part No. 8178573), provides the
In Home Service Professional with information on the operation and service of the Whirlpool Micro-
wave Oven Hood Combination. It is to be used as a training Job Aid and Service Manual. For specic
information on the model being serviced, refer to the “Use and Care Guide,” or “Tech Sheet” provided
with the microwave oven.
The Wiring Diagrams and Strip Circuits used in this Job Aid are typical and should be used for
training purposes only. Always use the Wiring Diagram supplied with the product when servicing
the unit.
GOALS AND OBJECTIVES
The goal of this Job Aid is to provide detailed information that will enable the In Home Service Professional to properly diagnose malfunctions and repair the Microwave Oven Hood Combination.
The objectives of this Job Aid are to:
• Understand and follow proper safety precautions.
• Successfully troubleshoot and diagnose malfunctions.
• Successfully perform necessary repairs.
• Successfully return the microwave oven to proper operational status.
WHIRLPOOL CORPORATION assumes no responsibility for any repairs made
on our products by anyone other than Authorized In Home Service Professionals.
Hood Exhaust Fan On High Automatically .................................................................. 7-3
Hood Exhaust Fan On Low Speed.............................................................................. 7-3
Hood Exhaust Fan On High / Medium ........................................................................ 7-4
Microwave Oven Plugged In—Time of Day Displayed ............................................... 7-4
Door Open—Oven Cavity Light Is On ......................................................................... 7-4
Cooktop Light On High ................................................................................................ 7-4
Cooktop Light On Low (Night Light) ............................................................................ 7-4
7-1
iv
GENERAL
IMPORTANT SAFETY INFORMATION
ELECTROSTATIC DISCHARGE
(ESD) SENSITIVE ELECTRONIC
ESD problems are present everywhere. ESD
may damage or weaken the electronic control
assembly. The new control assembly
may appear to work well after repair is nished,
but failure may occur at a later date
due to ESD stress.
IMPORTANT SAFETY
INSTRUCTIONS
Before touching any oven component or wiring,
always unplug the oven from its power
source and discharge the capacitor by using a
20,000 ohm discharge resistor or use an insulated plastic handle screwdriver to short across
the capacitor terminals.
Check that the unit is grounded before troubleshooting. Discharge any static charge from your
body by touching ground before handling any part
of the circuitry on the control board. Electrostatic
discharge may damage the control circuit.
Do not touch oven components or wiring during
operation. Attach meter leads with alligator
clips when making operational tests.
For continued protection against radiation
emission, replace only with these types of
switches: Primary (Interlock) Switch: SZM-V16FA-63 or VP-533A-OF; Secondary (Interlock)
Switch: SZM-V01-FA-32; Interlock (Monitor)
Switch: SZM-VI6-FA-62 or VP-532A-OF; Oven
Lamp Switch: SZM-V6-FA-31 or VP-331 AOD.
• Use an antistatic wrist strap. Connect
the wrist strap to a green ground connection
point or unpainted metal in the
appliance; or touch your nger repeatedly
to a green ground connection point
or unpainted metal in the appliance.
• Before removing the part from its package,
touch the antistatic bag to a green
ground connection point or unpainted
metal in the appliance.
• Avoid touching electronic parts or terminal
contacts. Handle the electronic
control assembly by the edges only.
• When repackaging the failed electronic
control assembly in an antistatic bag,
observe the above instructions.
It is neither necessary nor advisable to attempt
measurement of high voltage.
Attaching the adaptor ground terminal to the
wall receptacle cover screw does not ground
the appliance unless the cover screw is metal
and not insulated and the wall receptacle is
grounded through the house wiring.
1-1
WARNING TO IN HOME SERVICE PROFESSIONALS
To avoid possible exposure to microwave
radiation or energy, visually check the oven for
damage to the door and door seal before
operating any oven. Use a microwave survey
meter to check the amount of leakage before
servicing. In the event the R.F. Ieakage exceeds
4 mw/cm2 at 5 cm, appropriate repair
must be made before continuing to service the
unit. Check interlock function by operating the
door latch. The oven cook cycle should cut off
before the door can be opened.
The door and latching assembly contains the
radio frequency energy within the oven. The
door is protected by three safety interlock
switches. Do not attempt to defeat them.
Under no circumstances should you try to
operate the oven with the door open.
• Proper operation of microwave ovens requires
that the magnetron be properly
assembled to the waveguide and cavity.
Never operate the magnetron unless it is
properly installed.
• Be sure the “RF” seal is not damaged and
is assembled around the magnetron dome
properly when installing the magnetron.
• Routine service safety procedures should
be exercised at all times.
• Untrained personnel should not attempt
service without a thorough review of test
procedures and safety information contained
in this Job Aid.
Whirlpool microwave ovens have a monitoring
system designed to ensure proper operation of
the safety interlock systems.
The interlock monitor switch will immediately
cause the oven fuse to blow if the door is
opened and the primary door interlock switch
and/or the secondary interlock switch contacts
fail in a closed position.
CAUTION: Replace a blown fuse with a 20
ampere class H fuse only.
Test the upper and lower door interlock
switches, cook relay and interlock monitor
switch (middle switch) for proper operation as
described in the component test procedures,
before replacing the blown oven fuse.
Do not attempt to repair sticking contacts
of any interlock switch, safety switch, or
Cook (Latch) relay. The components must
be replaced.
Any indication of sticking contacts during component tests requires replacement of that component to ensure reliability of the safety interlock
system.
NOTE: If the fuse is blown, the monitor, primary,
and secondary interlock switches must be replaced. Be sure they are properly connected.
1-2
PRECAUTIONS TO BE OBSERVED BEFORE AND
DURING SERVICING TO AVOID POSSIBLE EXPOSURE
TO EXCESSIVE MICROWAVE ENERGY
A. Do not operate or allow the oven to be
operated with the door open.
B. Make the following safety checks on all
ovens to be serviced before activating the
magnetron or other microwave source,
and make repairs as necessary:
1) Interlock operation
2) Proper door closing
3) Seal and sealing surfaces (arcing,
wear, and other damage)
4) Damage to or loosening of hinges and
latches
5) Evidence of dropping or abuse
C. Before turning on the microwave power
for any service test or inspection within the
microwave generating components, check the
magnetron, wave guide or transmission
line, and cavity for proper alignment,
integrity, and connections.
D. Any defective or misadjusted components
in the interlock, monitor, door seal, and
microwave generation and transmission
systems shall be repaired, replaced, or
adjusted, using procedures described in
this Job Aid, before the oven is released to
the owner.
E. A microwave leakage check to verify compli-
ance with Federal Performance Standard
should be performed on each oven
prior to release to the owner.
F. Do not attempt to operate the oven if the
door glass is broken.
1-3
R.F. LEAKAGE TEST
EQUIPMENT
• Electromagnetic energy leakage monitor
(NARDA 81 00B, HOLADAY H 1501 ).
• 275 ±15 ML glass beaker.
TEST
On every service call, checks for microwave
energy emission must be made according to
the following manner.
1. Remove the cooking rack from the oven
cavity, if the microwave oven is so equipped.
2. Place a 275 ±15 ML (9.3 oz.) glass of
water in the center of the oven bottom.
3. Select “HIGH” cook power, turn the microwave
oven on, and test for R.F. Ieakage at
the following locations:
a) Around the cabinet at the front.
b) Around the door.
c) Across the console panel.
d) Horizontally across the door.
e) Vertically across the door.
f) Diagonally across the door.
g) Across the air vents.
h) Across the rear air vent.
i) All lockseams.
j) Weld at bottom.
k) Bottom plate.
I) Oven feet.
4. The scan speed is one inch per second.
When checking for R.F. Ieakage, use an approved R.F. measuring device to ensure less
than 4 mw/cm2 emission at 5 cm distance with
a maximum scan rate of 2.54 cm/second, in
compliance with U.S. Government Department
of Health, Education and Welfare 21CFR1030,
performance Standard for Microwave Ovens.
A properly operating door and seal assembly
will normally register small emissions, but they
must be no greater than 4 mw/cm2 to allow for
measurement uncertainty.
NOTE: Enter leakage readings in BEFORE and
AFTER spaces on the service document.
All microwave ovens exceeding the emission
level of 4 mw/cm2 must be reported to Dept. of
Service for microwave ovens immediately and
the owner should be told not to use the microwave oven until it has been repaired completely.
If a microwave oven is found to operate with the
door open, report to Dept. of Service, the
manufacturer and CDRH* immediately. Also
tell the owner not to use the oven.
The interlock monitor switch acts as the nal
safety switch protecting the customer from
microwave radiation. If the interlock monitor
switch operated to blow the fuse when the
interlocks failed, you must replace all interlock
switches with new ones, because the contacts
of those interlock switches may be melted and
welded together.
If safety interlock/monitor switch replacement,
or adjustment, is required, you must reconnect
the circuit, and perform a continuity check on
the monitor circuit.
All repairs must be performed in such a manner
that microwave energy emissions are minimal.
Address for CDRH is:
Ofce of Compliance (HFZ-342) Center for
Devices and Radiological Health
2098 Gaither Road
Rockville, MD 20850
* CDRH: Center for Devices and Radiological
Health, Food and Drug Administration.
1-4
WHIRLPOOL MODEL NUMBER DESIGNATIONS
MODEL NUMBER M H 2 17 5 X S T 0
INTERNATIONAL SALES IND.
OR MARKETING CHANNEL
IF PRESENT
PRODUCT GROUP
G = WHIRLPOOL GOLD
M = MICROWAVE
PRODUCT IDENTIFICATION
B = BROWNER
C = CONVECTION
G = GRILL / CRISPER
H = OTR HOOD COMBO
K = KITS
M = GOLD CONVECTION
S = STIRRER FAN
T = TURNTABLE
MODEL VARIATIONS
0 - 9
CUBIC FEET
04 = .4 CU. FT. 09 = 0.9 CU. FT. 15 = 1.5 CU. FT.
06 = .6 CU. FT. 10 = 1.0 CU. FT. 16 = 1.6 CU. FT.
07 = .7 CU. FT. 12 = 1.2 CU. FT. 17 = 1.7 CU. FT.
08 = .8 CU. FT. 14 = 1.4 CU. FT.
Convertible Recirculation or Exhaust Vertical/HorizontalConvertible Recirculation or Exhaust Vertical/Horizontal
3 1/4"H x 10"W3 1/4"H x 10"W
112112
221221
2 Speed2 Speed
YES : 60° C, 140°FYES : 60° C, 140°F
Sound Power Level: 70 dB(A)Sound Power Level: 70 dB(A)
Yes (2)Yes (2)
Yes (1)Yes (1)
Twin Squirrel Cage Blower: Left fan wheel for hood airflow and cavity ventilation.
Right fan for cooling airflow.
Twin Squirrel Cage Blower: Left fan wheel for hood airflow and cavity ventilation.
Right fan for cooling airflow.
Recirculation modeRecirculation mode
3 Feet3 Feet
120V, Single Phase, 60 Hz120V, Single Phase, 60 Hz
1800 Watts, For Use With 15 - 20 Amp Circuit1800 Watts, For Use With 15 - 20 Amp Circuit
YesYes
FCC, DHHS, UL, CULFCC, DHHS, UL, CUL
57 lbs.57 lbs.
82058848205884
8205870
8205870
In Use & Care GuideIn Use & Care Guide
8205880
81785738178573
1-9
WHIRLPOOL MICROWAVE OVEN WARRANTY
WHIRLPOOL CORPORATION MAJOR APPLIANCE WARRANTY
ONE YEAR LIMITED WARRANTY
For one year from the date of purchase, when this major appliance is operated and maintained according to instructions attached to or
furnished with the product, Whirlpool Corporation or Whirlpool Canada LP (hereafter “Whirlpool”) will pay for FSP
®
replacement parts
and repair labor to correct defects in materials or workmanship. Service must be provided by a Whirlpool designated service company.
ITEMS WHIRLPOOL WILL NOT PAY FOR
1. Service calls to correct the installation of your major appliance, to instruct you how to use your major appliance, to replace or repair
house fuses or to correct house wiring or plumbing.
2. Service calls to repair or replace appliance light bulbs, air filters or water filters. Those consumable parts are excluded from warranty
coverage.
3. Repairs when your major appliance is used for other than normal, single-family household use.
4. Damage resulting from accident, alteration, misuse, abuse, fire, flood, acts of God, improper installation, installation not in
accordance with electrical or plumbing codes, or use of products not approved by Whirlpool.
5. Any food loss due to refrigerator or freezer product failures.
6. Replacement parts or repair labor costs for units operated outside the United States or Canada.
7. Pickup and delivery. This major appliance is designed to be repaired in the home.
8. Repairs to parts or systems resulting from unauthorized modifications made to the appliance.
9. Expenses for travel and transportation for product service in remote locations.
10. The removal and reinstallation of your appliance if it is installed in an inaccessible location or is not installed in accordance with
published installation instructions.
DISCLAIMER OF IMPLIED WARRANTIES; LIMITATION OF REMEDIES
CUSTOMER'S SOLE AND EXCLUSIVE REMEDY UNDER THIS LIMITED WARRANTY SHALL BE PRODUCT REPAIR AS PROVIDED
HEREIN. IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE,
ARE LIMITED TO ONE YEAR OR THE SHORTEST PERIOD ALLOWED BY LAW. WHIRLPOOL SHALL NOT BE LIABLE FOR
INCIDENTAL OR CONSEQUENTIAL DAMAGES. SOME STATES AND PROVINCES DO NOT ALLOW THE EXCLUSION OR LIMITATION
OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, OR LIMITATIONS ON THE DURATION OF IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS, SO THESE EXCLUSIONS OR LIMITATIONS MAY NOT APPLY TO YOU. THIS WARRANTY GIVES
YOU SPECIFIC LEGAL RIGHTS AND YOU MAY ALSO HAVE OTHER RIGHTS, WHICH VARY FROM STATE TO STATE OR PROVINCE
TO PROVINCE.
Outside the 50 United States and Canada, this warranty does not apply. Contact your authorized Whirlpool dealer to determine if
another warranty applies.
If you need service, first see the “Troubleshooting” section of the Use & Care Guide. After checking “Troubleshooting,” additional help
can be found by checking the “Assistance or Service” section or by calling Whirlpool. In the U.S.A., call 1-800-253-1301. In Canada,
call 1-800-807-6777.
8/05
Keep this book and your sales slip together for future
reference. You must provide proof of purchase or installation
date for in-warranty service.
Write down the following information about your major appliance
to better help you obtain assistance or service if you ever need it.
You will need to know your complete model number and serial
number. You can find this information on the model and serial
number label located on the product.
Dealer name ____________________________________________________
The microwave uses the exhaust blower motor to remove vapors from the cooking area below the
unit, it also circulates air within the unit to assist cooking performance and cool the operating components.
Cooktop
Venting
Component
cooling
This process is accomplished by using one side
of the blower motor assembly to pull ambient air
into the unit to cool the working components,
and the remaining side of the blower for exhausting steam and cooking odors.
3-1
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