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    Home » INSIGNIA NS-MW12SS6 1.2 Cu. Ft. Microwave Oven User Manaul
    Insignia

    INSIGNIA NS-MW12SS6 1.2 Cu. Ft. Microwave Oven User Manaul

    Gabriel SmithBy Gabriel SmithOctober 23, 2025Updated:October 23, 2025No Comments17 Mins Read
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    INSIGNIA NS-MW12SS6 1.2 Cu. Ft. Microwave Oven

    INSIGNIA-NS-MW12SS6-1.2-Cu.-Ft.-Microwave-Oven-product

    Safety Instructions

    1. Install or locate this appliance only by the provided installation instructions.
    2. Some products, such as whole eggs and sealed containers (for example, closed glass jars, cannot explode and should not be heated in this microwave.
    3. Use this appliance only for its intended use as described in the manual.
    4. Do not use corrosive chemicals or vapors in this appliance.
    5. As with any appliance, close supervision is necessary when used by children.
    6. Do not operate this appliance if it has a damaged cord or plug, if it is not working properly, or if it has been damaged or dropped.
    7. Do not cover or block any openings on the appliance.
    8. Remove wire twist-ties from paper or plastic bags before placing them in the oven.
    9. Do not use the cavity for storage purposes. Do not leave paper products, cooking utensils, or food in the cavity when not in use.
    10. Do not overheat the liquid.
    11. Stir the liquid both before and halfway through heating it.
    12. Do not use straight-sided containers with narrow necks.
    13. Use extreme care when inserting a spoon or other utensil into the container.

    Grounding instructions

    This appliance must be grounded. In the event of an electrical short circuit, grounding reduces the risk of electric shock by providing an escape wire for the electric current. This appliance is equipped with a cord having a grounding wire with a grounding plug. The plug must be plugged into an outlet that is properly installed and grounded.

    1. A short power supply cord is provided to reduce the risks resulting from becoming entangled in or tripping over a longer cord.
    2. Longer cord sets or extension cords are available and may be used if care is exercised in their use.
    3. If a long cord or extension cord is used:
    4. The marked electrical rating of the cord set or extension cord should be at least as great as the electrical rating of the appliance.
    5. The extension cord must be a grounding-type 3-wire cord.
    6. The longer cord should be arranged so that it will not drape over the countertop or tabletop, where it can be pulled on by children or tripped over unintentionally.y

    Radio interference

    1. Operation of the microwave oven may cause interference to your radio, TV, or similar equipment.
    2. When there is interference, it may be reduced or eliminated by taking the following measures:
      • Clean the door and sealing surface of the oven.
      • Reorient the receiving antenna of the radio or television.
      • Move the microwave oven away from the receiver.
      • Plug the microwave oven into a different outlet so that the microwave and receiver are on different branch circuits.
      • Relocate the microwave oven with respect to the receiver.
    1. Do not attempt to operate this oven with the door open since operation can result in harmful exposure to microwave energy. It is important not to defeat or tamper with the safety interlocks.
    2. Do not place any object between the oven front face and the door, or allow soil or cleaner residue to accumulate on sealing surfaces.
    3. Do not operate the oven if it is damaged. It is particularly important that the oven door closes properly and that there is no damage to the:
    4. The oven should not be adjusted or repaired by anyone except properly qualified service personnel.

    Cookware and Materials Test

    1. Fill a microwave-safe container with 1 cup (250 ml) of cold water, along with the cookware or materials in question.
    2. Cook on maximum power for one minute. Do not exceed one minute cooking time.
    3. Carefully feel the cookware or material. If the empty cookware or material is warm, do not use it for microwave cooking.

    Materials you can use

    MATERIALREMARKS
    Browning dishFollow the manufacturer’s instructions. The bottom of the browning dish must be at least 3/16-in. (5mm) above the turntable. Incorrect usage may cause the turntable to break.
    DinnerwareUse microwave-safe only. Follow the manufacturer’s instructions. Do not use cracked or chipped dishes.
    Glass jarsAlways remove the lid. Use only to heat food until just warm. Most glass jars are not heat-resistant and may break.
    GlasswareUse heat-resistant oven glassware only. Make sure there is no metallic trim. Do not use cracked or chipped dishes.
    Oven cooking bagsFollow the manufacturer’s instructions. Do not close with a metal tie. Make slits to allow steam to escape.
    Paper plates and cupsUse for short–term cooking/warming only. Do not leave the oven unattended while cooking.
    Paper towelsUse to cover food for reheating and absorbing fat. Use with supervision for short-term cooking only.
    Parchment paperUse as a cover to prevent splattering or a wrap for steaming.
    PlasticUse only if labeled “Microwave Safe.” Follow the manufacturer’s instructions. Some plastic containers soften as the food inside gets hot. “Boiling bags” and tightly closed plastic bags should be slit, pierced, or vented, as indicated on the package.
    Plastic wrapUse microwave-safe only. Use to cover food during cooking to retain moisture. Do not allow plastic wrap to touch food.
    ThermometersUse microwave-safe only (such as meat and candy thermometers).
    Wax paperUse as a cover to prevent splattering and retain moisture.
    Materials to be avoided
    MATERIALREMARKS
    Aluminum foilMay cause an electric spark. Use a microwave-safe dish instead.
    Aluminum trayMay cause an electric spark. Use a microwave-safe dish instead.
    Food carton with a metal handleMay cause an electric spark. Use a microwave-safe dish instead.
    Metal or metal-trimmed utensilsMetal shields the food from microwave energy. The metal trim may cause arcing.
    Metal twist tiesIt may cause an electric spark and could cause a fire in the oven.
    Paper bagsMay cause a fire in the oven.
    Plastic foamPlastic foam may melt or contaminate the liquid inside when exposed to high temperatures.
    WoodWood will dry out when used in the microwave oven and may split or crack.

    Features

    • 1,000 W of power quickly heats food
    • Six presets easily cook your favorite foods
    • 12.4-inch (31.5 cm) turntable helps evenly heat food
    • Internal LED light shows your food
    • Eleven power levels heat food to perfection
    • Black plastic finish looks great with any décor
    • Stylish blue LED display provides easy control

    Package contents

    • Countertop Microwave
    • Turntable (with ring)
    • User Guide

    Description

    INSIGNIA-NS-MW11BK0-1-1-Cu.-Ft.-Microwave-Oven-fig-01

    #ITEMDESCRIPTION
    1Safety interlock systemPrevents the microwave from operating when the door is open.
    2Glass turntableAllows food to cook evenly.
    3Control panelUse to set cooking times and enter other information as needed.
    4Waveguide coverCovers the waveguide. DO NOT REMOVE.
    5Turntable ring assemblyAllows the turntable to rotate to cook food evenly.
    6Turntable shaftRotates the turntable assembly.

    Control panel

    #ITEMDESCRIPTION
    1DisplayIn standby mode, it displays the time.

    In cooking mode, it displays cooking time, weight, and other information.

    2Time cookPress to set the amount of time you want to heat your food, then press the number buttons to enter the time you want (up to 99 minutes and 99 seconds).
    3PowerPress to set the power level of your microwave, then press the number buttons to set the level you want (0-10).
    4Auto menuPress one of these buttons to automatically cook the item indicated. See “Cooking with the auto menu” on page 9.
    5Express cookIn standby mode, press to quickly start cooking for 1 to 6 minutes. See “Cooking quickly” on page 9.
    6Number padPress to enter cook time, defrost time, clock time, and other information.
    7Stop/CancelPress to stop the cooking process. Press again to cancel the cooking operation.
    8DefrostPress Time Defrost, then enter the time you want for an item to defrost. See “Defrosting by time” on page 10.

    Press Weight Defrost, then enter the weight of the item you want to defrost. The cooking time is set automatically. See “Defrosting by weight” on page 10.

    9ClockPress to set or check the clock. See “Setting the clock” on page 8.
    10Kitchen timerPress this button, then enter the time you want to count down. See “Using the kitchen timer” on page 9.
    11Start/Add 30 secondsIn standby mode, press this button to begin cooking.

    While cooking, press this button to add 30 seconds to the cooking time.

    12MemoryPress repeatedly to choose a memorized procedure.

    Setting up your microwave oven

    1. Remove all packing material, protective film, and accessories. Do not remove the light brown Mica cover that is attached to the oven cavity to protect the magnetron.
    2. Check for any damage, such as dents or a broken door. Do not use the microwave if it is damaged.
    3. Select a level surface that provides enough open space for the vents:
    4. Plug your microwave into a power outlet.

    Installing the turntable

    Setting the clock and the timer

    1. Press Clock. Your display shows “00:00”.
    2. Use the number pad to enter the current time (1:00–12:59), then press Clock to save the setting.
    3. The colon (:) flashes to count the seconds, and the clock is set.
    4. If the display shows “0:00”, the clock is not set.
    Using the kitchen timer
    1. Press Kitchen Timer. The display shows “00:00” and the first digit flashes.
    2. Use the number pad to enter the time (up to 99 minutes and 99 seconds), then press START/+30SEC. When the time reaches 0, the buzzer rings.

    Cooking with your microwave

    Microwave cooking

    1. Press Time Cook, then use the number pad to enter the cooking time that you want.
    2. Press Power, then enter the power level that you want (0-10). The default power level is 100% (PL10).
      Level109876543210
      Power100%90%80%70%60%50%40%30%20%10%0%
      DisplayPL10PL9PL8PL7PL6PL5PL4PL3PL2PL1PL0
    3. Press START/+30SEC to begin heating. The buzzer rings when the microwave is finished. OR

    For multi-stage cooking, repeat steps 1-2 to program the second stage, then press START/+30SEC. The buzzer will ring between stages and automatically move on to the second stage.

    Cooking quickly
    • Press START/+30SEC to instantly cook something at 100% power for 30 seconds. OR
    • Press 1-6 on the number pad to instantly cook something at 100% power for 1-6 minutes.
    • To increase the time in 30-second increments, press START/+30SEC The maximum cooking time is 99 minutes and 99 seconds.

    Cooking with the auto menu

    • Press Popcorn repeatedly until the weight of your popcorn bag (1.75, 3.0, or 3.5 ounces) is shown on the display.
    • Press START/+30SEC to start. The buzzer sounds once, then cooks your popcorn.

    Potato

    • Press Potato repeatedly until the number of potatoes you’re cooking (1-3) is shown on the display.
    AMOUNTWEIGHT (APPROX.)
    1 potato8 oz. (227 g)
    2 potatoes16 oz. (453 g)
    3 potatoes24 oz. (680 g)
    1. Press START/+30SEC to start. The buzzer sounds once, then cooks your potato.

    Frozen vegetables

    1. Press Frozen Vegetable repeatedly until the weight of your vegetables (4.0, 8.0, or 16.0 ounces) is shown on the display.
    2. Press START/+30SEC to start. The buzzer sounds once, then cooks your vegetables.

    Beverages

    • Press the Beverage repeatedly until the number of cups (1-3) is shown on the display.
    • Press START/+30SEC to start. The buzzer sounds once, then heats your drink

    Saving a memory procedure

    Memorized procedures let you save heating operations (cook time and power level) that you use often. You can save up to three procedures. 1 Press 0/Memory repeatedly to choose the memorized number (1-3) that you want to use.

    1. Press Time Cook, then use the number pad to end the cook time that you want.
    2. Press Power, then enter the power level that you want (1-10). The default power level is 100% (PL10).
      Level109876543210
      Power100%90%80%70%60%50%40%30%20%10%0%
      DisplayPL10PL9PL8PL7PL6PL5PL4PL3PL2PL1PL0
    3. (Optional) If you want to add a second stage, repeat steps 2-3. You can only add two stages to a memorized procedure.
    4. Press START/+30SEC. The buzzer beeps, and the display shows the memorized procedure number.
    5. Press START/+30SEC again to run the procedure.

    Cleaning and Maintenance

    Cleaning the outside of your microwave

    Exterior: The outside surface is precoated plastic. Clean INSIGNIA NS-MW12SS6 1.2 Cu. Ft. Microwave Oven the outside with mild soap and water, then rinse and dry with a soft cloth. Do not use any type of household or abrasive cleaner.

    Door

    Wipe the window on both sides with a damp cloth to remove any spills or spatters. Metal parts are easier to maintain if wiped frequently with a damp cloth. Avoid the use of spray and other harsh cleaners as they may stain, streak, or dull the door surface.

    Control panel

    If the control panel is dirty, open the microwave door INSIGNIA NS-MW12SS6 1.2 Cu. Ft. Microwave Oven before cleaning. Wipe the panel with a cloth dampened slightly with water only. Dry with a soft cloth. Do not scrub or use any sort of chemical cleaners. Close the door and press STOP/Cancel to clear any buttons you may have pressed.

    Cleaning the inside of your microwave

    Interior: Wipe with a soft cloth and warm water. Do not use abrasive or harsh cleaners or scouring pads. For baked-on food, use baking soda or a mild soap, then rinse thoroughly with hot water.

    Waveguide cover

    The waveguide cover is located on the side wall inside the microwave cavity. It is made from mi, c, and aso; it requires special care. Keep the waveguide cover clean to assure good microwave performance. Carefully wipe with a damp cloth any food spatters from the surface of the cover immediately after they occur. Built-up splashes may overheat and cause smoke or possibly catch fire. DO NOT REMOVE THE WAVEGUIDE COVER.

    Removing odors

    Occasionally, a cooking odor may remain in the microwave. To remove, combine one cup (.25 Lof ) of water, grated p, el and juice of one lemon, and several whole cloves in a two-cup (.5 L) glass measuring cup. Boil for several minutes using 100% power, then let it cool in the microwave. Wipe the interior with a soft cloth.

    Turntable

    Remove the turntable and wash it in mild, sudsy water. For stubborn stains, use a mild cleanser and non non-abrasive scouring sponge. You can also wash them in the top rack of a dishwasher. The turntable motor shaft is not sealed, so excess water or spills should be wiped up immediately.

    Specifications

    • Model: NS-MW09SS8
    • Rated voltage: 120 V~60 Hz
    • Rated input power (microwave): 1350 W
    • Rated output power (microwave): 900 W
    • Oven capacity: 0.9 Cu. Ft.
    • Turntable diameter: 10.6 in. (27.0 cm)
    • External dimensions (HxWxD): 11.5 x 19.1 x 14.8 in. (29.3 x 48.5 x 37.5 cm)
    • Internal dimensions (HxWxD): 8.7 x 12.4 x 13.7 in. (22.1 x 31.4 x 34.7 cm)
    • Certifications: UL approved
    • Power cord length: 39.4 in. (1m)
    • Net weight: 27.3 lbs. (12.4 kg)

    Troubleshooting

    PROBLEMPOSSIBLE CAUSEPOSSIBLE SOLUTION
    The microwave will not startThe electrical cord is not plugged in.Plug in the electrical cord.
    The door is open.Close the door and try again.
    The wrong operation is set.Check the instructions and try again.
    Arcing or sparking in the microwaveYou are attempting to use incorrect materials in the microwave.Use only microwave-safe materials.
    You are attempting to use the microwave when it’s empty.Do not operate the microwave when it’s empty.
    Spilled food remains in the microwave.Clean the microwave with a wet towel.
    Unevenly cooked foodsYou are attempting to use incorrect materials in the microwave.Use only microwave-safe materials.
    The food is not defrosted completely.Defrost the food completely before attempting to cook it.
    The cooking time or power level is not adequate to cook the food.Use the correct cooking time and power level.
    The food is not turned or stirred.Turn or stir the food.
    Overcooked foodsThe cooking time or power level is not adequate to cook the food.Use the correct cooking time and power level.
    Undercooked foodsYou are attempting to use incorrect materials in the microwave.Use only microwave-safe materials.
    The food is not defrosted completely.Defrost the food completely before attempting to cook it.
    The cooking time or power level is not adequate to cook the food.Use the correct cooking time and power level.

    Legal notices

    FCC Statement

    This device complies with Part 15 of the FCC Rules. Operation INSIGNIA NS-MW12SS6 1.2 Cu. Ft. Microwave Oven is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

    FCC Caution

    Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment.

    EMC guidance

    • Don’t use near active HF Insignia NS-GLSBFSCW1 Glass Scale surgical equipment or the RF shielded room of an ME system for magnetic resonance imaging, where the intensity of EM disturbances is high.
    • Use of accessories, transducers, and cables other than those specified or provided by the manufacturer of this equipment could result in increased electromagnetic emissions or decreased electromagnetic immunity of this equipment and result in improper operation.
    • Otherwise, degradation of the performance INSIGNIA NS-MW12SS6 1.2 Cu. Ft. Microwave Oven of this equipment could result.

    One-Year Warranty

    Definitions

    The Distributor* of Insignia-branded products warrants to you, the original purchaser of this new Insignia-branded product (“Product”), that the Product shall be free of defects in the original manufacturer of the material or workmanship for one (1) year from the date of your purchase of the Product (“Warranty Period”).

    How to obtain warranty service?

    If you purchased the Product at a Best Buy retail store location or from a Best Buy online website, please take your original receipt and the Product to any Best Buy store. Make sure that you place the Product in its original packaging or packaging that provides the same amount of protection as the original packaging. To obtain warranty service, in the United States and Canada, call 1-877-467-4289. Call agents may diagnose and correct the issue over the phone.

    Where is the warranty valid?

    This warranty is valid only in the United States and Canada at Best Buy branded retail stores or websites to the original purchaser of the product in the country where the original purchase was made.

    Customer Support

    • Ph: 1-877-467-4289
    • Website: www.insigniaproducts.com

    INSIGNIA is a trademark of Best Buy and its affiliated companies. Distributed by Best Buy Purchasing, LLC 7601 Penn Ave South, Richfield, MN 55423 U.S.A.

    ©2021 Best Buy. All rights reserved.

    FAQs

    What is the capacity of the INSIGNIA NS-MW12SS6 microwave?

    This microwave is perfect for cooking and reheating medium-to-large items because of its roomy 1.2 cubic feet inside.

    What power levels does this microwave offer?

    You may adjust the cooking intensity with its various power levels, which often range from 10% to 100%.

    Does the microwave have preset cooking programs?

    Yes, it has easy-to-use preset menus for popcorn, drinks, potatoes, defrost, and reheat.

    How do I use the defrost function?

    To properly thaw frozen foods without cooking them, choose the defrost mode based on weight or time.

    Is there a child safety lock feature?

    Indeed, the microwave has a child lock to prevent unintentional use and protect your home.

    What is the wattage of this microwave?

    With an operating capacity of about 1000 watts, the NS-MW12SS6 offers strong and effective cooking.

    Can the microwave timer be set independently of cooking?

    It is possible to utilise the timer feature without turning on the microwave, which helps plan other household chores.

    INSIGNIA NS-MW12SS6 installation guide INSIGNIA NS-MW12SS6 maintenance guide INSIGNIA NS-MW12SS6 manual INSIGNIA NS-MW12SS6 operation manual OnyxGuides Manual User Manual
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    Gabriel Smith

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