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10

MICROWAVE OVEN CARE

General Cleaning

IMPORTANT:

 Before cleaning, make sure all controls are off and the microwave oven is cool. Always follow label instructions on 

cleaning products.

Soap, water and a soft cloth or sponge are suggested unless otherwise noted.

MICROWAVE OVEN CAVITY

To avoid damage to the microwave oven cavity, do not use soap-
filled scouring pads, abrasive cleaners, steel-wool pads, gritty 
washcloths or some recycled paper towels.

The area where the microwave oven door and frame touch when 
closed should be kept clean.

Average soil

Mild, nonabrasive soaps and detergents:

Rinse with clean water and dry with soft, lint-free cloth.

Heavy soil

Mild, nonabrasive soaps and detergents:

Heat 1 cup (250 mL) of water for 2 to 5 minutes in microwave 
oven. Steam will soften soil. Rinse with clean water and dry 
with soft, lint-free cloth.

Odors

Lemon juice or vinegar:

Heat 1 cup (250 mL) of water with 1 tbs (15 mL) of either 
lemon juice or vinegar for 2 to 5 minutes in microwave oven.

Microwave Inlet Cover

To avoid arcing and microwave oven damage, the microwave 
inlet cover (see “Parts and Features”) should be kept clean.

Wipe with wet cloth.

MICROWAVE OVEN DOOR AND EXTERIOR

The area where the microwave oven door and frame touch when 
closed should be kept clean.

Mild, nonabrasive soaps and detergents:

Rinse with clean water and dry with soft, lint-free cloth.

Glass cleaner and paper towels or nonabrasive plastic 
scrubbing pad:

Apply glass cleaner to towel, not directly to surface.

CONTROL PANEL

Sponge or soft cloth and water:

Dampen sponge with water and wipe panel. Dry with soft 
cloth.

To avoid damage to the control panel, do not use chemical or 
abrasive cleansers.

TURNTABLE

Replace turntable immediately after cleaning. Do not operate the 
microwave oven without the turntable in place.

Mild cleanser and scouring pad

Dishwasher

TROUBLESHOOTING

Try the solutions suggested here first in order to avoid the cost of an unnecessary service call.

Nothing will operate

Has a household fuse blown, or has a circuit breaker 
tripped?

Replace the fuse or reset the circuit breaker. If the problem 
continues, call an electrician.

Microwave oven will not operate

Is the magnetron working properly?

Try to heat 1 cup (250 mL) of cold water for 2 minutes at 
100% cooking power. If water does not heat, try the steps 
below. If microwave oven still does not operate, call for 
service. See “Assistance or Service” section.

Is the door completely closed?

Firmly close door.

Is a packaging spacer (on some models) attached to the 
inside of the door?

Remove packaging spacer, then firmly close door.

Is the electronic microwave oven control set correctly?

See “Microwave Oven Control” section.

On some models, is the Control Lock set?

See “Control Lock” section.

Microwave oven makes humming noise

This is normal and occurs when the power supply in the 
magnetron cycles on.

Microwave oven door looks wavy

This is normal and will not affect performance.

Turntable will not operate

Is the turntable properly in place?

Make sure turntable is correct side up and is sitting securely 
on the turntable support. See “Turntable” section.

Is the turntable support operating properly?

Remove turntable. Remove and clean turntable support and 
rollers. Replace turntable. Place 1 cup (250 mL) of water on 
the turntable, then restart microwave oven. If it still is not 
working, call for service. See “Assistance or Service” section. 
Do not operate the microwave oven without turntable and 
turntable support working properly.

Summary of Contents for MT4078

Page 1: ...AVE OVEN Use CareGuide For questions about features operation performance parts accessories or service call 1 800 253 1301 or visit our website at www whirlpool com Table of Contents 2 W10178097A Model MT4078 ...

Page 2: ... WARRANTY 12 MICROWAVE OVEN SAFETY You can be killed or seriously injured if you don t immediately You can be killed or seriously injured if you don t follow All safety messages will tell you what the potential hazard is tell you how to reduce the chance of injury and tell you what can happen if the instructions are not followed Your safety and the safety of others are very important We have provi...

Page 3: ...it breaker panel Do not use the cavity for storage purposes Do not leave paper products cooking utensils or food in the cavity when not in use Liquids such as water coffee or tea are able to be overheated beyond the boiling point without appearing to be boiling Visible bubbling or boiling when the container is removed from the microwave oven is not always present THIS COULD RESULT IN VERY HOT LIQU...

Page 4: ...istance or Service section PRECAUTIONS TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY a Do not attempt to operate this oven with the door open since open door operation can result in harmful exposure to microwave energy It is important not to defeat or tamper with the safety interlocks b Do not place any object between the oven front face and the door or allow soil or cleaner residue to ...

Page 5: ...ny of the parts To Install 1 Place the support on the microwave oven cavity bottom 2 Place the turntable on the support Electrical Shock Hazard Plug into a grounded 3 prong outlet Do not remove ground prong Do not use an adapter Do not use an extension cord Failure to follow these instructions can result in death fire or electrical shock WARNING GROUNDING INSTRUCTIONS SAVE THESE INSTRUCTIONS For a...

Page 6: ...he ADD MINUTE pad starts the microwave oven for 1 minute at 100 power More cook time may be added in 1 minute increments by touching ADD MINUTE repeatedly The Add Minute function may be used only when no other function is operating Clock This is a standard 12 hour clock 12 00 11 59 To Set The microwave oven must be off 1 Touch CLOCK SET 2 Touch number pads to enter correct time of day 3 Touch CLOC...

Page 7: ... may be used Plastic wrap should be turned back at one corner to provide an opening to vent steam Condensation on the door and cavity surfaces is normal during heavy cooking Stirring and Turning Stirring and turning redistribute heat evenly to avoid overcooking the outer edges of food Stir from outside to center If possible turn food over from bottom to top Arranging If heating irregularly shaped ...

Page 8: ...ar in the display and the end of cycle tones will sound 5 Touch OFF or open the door to clear the display The cook time and power may not be changed after touching START without interrupting cooking CookinginStages The microwave oven can be set to cook at different cooking powers for various lengths of time up to 3 stages plus a defrosting stage To Cook in Stages 1 Place food on the turntable and ...

Page 9: ... and a third time for the Fish setting 3 Enter the weight Weight can be set from 0 1 lb to 6 0 lbs 45 g to 2 7 kg 4 Touch START The display will count down the defrost time During defrosting 5 short tones will sound These tones indicate it is time to check turn rearrange or separate food Open door turn food if necessary close door and touch START to resume defrosting When the cycle ends END will a...

Page 10: ... not use chemical or abrasive cleansers TURNTABLE Replace turntable immediately after cleaning Do not operate the microwave oven without the turntable in place Mild cleanser and scouring pad Dishwasher TROUBLESHOOTING Try the solutions suggested here first in order to avoid the cost of an unnecessary service call Nothing will operate Has a household fuse blown or has a circuit breaker tripped Repl...

Page 11: ...lling please know the purchase date and the complete model and serial number of your appliance This information will help us to better respond to your request If you need replacement parts If you need to order replacement parts we recommend that you use only FSP replacement parts FSP replacement parts will fit right and work right because they are made with the same precision used to build every n...

Page 12: ...llation of your major appliance if it is installed in an inaccessible location or is not installed in accordance with published installation instructions 11 Major appliances with original model serial numbers that have been removed altered or cannot be easily determined This warranty is void if the factory applied serial number has been altered or removed from your major appliance The cost of repa...

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