Whirlpool Microwave Won’t Start

A malfunctioning microwave can disrupt your daily routine, and when your Whirlpool microwave won’t start, it can be frustrating. However, there are several potential causes and solutions to this issue. This guide will help you troubleshoot and address common problems preventing your Whirlpool microwave from starting.

Check the Power Source


If the power supply is not the problem, consider the following:

  1. Control Lock: Some Whirlpool microwaves have a control lock feature that prevents accidental operation. Check if the control lock is activated and deactivate it if necessary. This is typically done by holding down a specific button or following the instructions in the user manual.
  2. Door Latch: Microwave doors have safety switches that ensure the microwave only runs when the door is securely closed. Examine the door latch and the switches to ensure they are functioning properly. If the latch is damaged or misaligned, it may need repair or replacement.
  3. Interlock Switches: Modern microwaves have multiple interlock switches that are engaged when the door is closed. If any of these switches are faulty or misaligned, the microwave won’t start. A technician can diagnose and replace these switches if necessary.

Timer and Settings

If the microwave still won’t start, look into the timer and settings:

  1. Timer Setting: Check if a timer has been set, which could be preventing the microwave from starting. Clear any timer settings and try again.
  2. Cooking Program: Ensure you’ve selected the correct cooking program, time, and power level. Incorrect settings may cause the microwave to appear unresponsive.
  3. Child Lock: Some Whirlpool microwaves have a child lock feature that disables the keypad. Refer to the user manual to learn how to activate or deactivate it.

Power Supply and Internal Components

If none of the above solutions resolve the issue, it might be related to the microwave’s internal components:

  1. Fuse: There is an internal fuse in most microwaves that can blow if there’s a power surge or an internal issue. Replacing the fuse may solve the problem, but it’s best done by a professional technician.
  2. Magnetron: The magnetron is the microwave’s heating element. If it’s faulty, the microwave won’t start. Replacing a magnetron is a complex task and should be done by a certified technician.
  3. Control Board: The control board is the brain of the microwave. If it’s malfunctioning, it can prevent the microwave from starting. A technician can diagnose and replace the control board if necessary.
  4. Faulty Door Switch Assembly: If the door switch assembly is malfunctioning, the microwave won’t start, as it relies on the switches to detect when the door is closed securely. Replacing this assembly may be required.
  5. Faulty Thermal Cut-off Fuse: Some microwaves have a thermal cut-off fuse that can blow if the microwave overheats. If this fuse is faulty, it may prevent the microwave from starting. A technician can replace this fuse.

Professional Assistance

If you’ve gone through all these troubleshooting steps and your Whirlpool microwave still won’t start, it’s advisable to seek professional help. Contact Whirlpool customer service or a certified appliance technician for a thorough diagnosis and repair.

Common Causes of Whirlpool Microwave Not Starting

CauseDescriptionTroubleshooting StepsPotential SolutionAdditional Notes
Power SupplyNo power to the microwave.1. Check power outlet.Plug in and reset breaker.Ensure the outlet is functional.
Door SwitchDoor switch not engaging properly.1. Inspect door latch.Adjust or replace switch.Ensure the door closes securely.
Control PanelControl panel malfunctioning.1. Restart the microwave.Reset or replace panel.Look for error codes or display issues.
Interlock SystemInterlock system preventing operation.1. Check door alignment.Adjust interlock parts.Ensure door seals correctly.
Faulty Fuse or CircuitBlown fuse or tripped circuit breaker.1. Check microwave’s circuit.Replace fuse or reset breaker.Investigate underlying electrical issues.

Microwave Won’t Start Troubleshooting Steps

Step NumberTroubleshooting StepDescriptionPotential ResultNotes
1Power Supply CheckEnsure the microwave is receiving power.Identifying power issues.The outlet and circuit breaker should be inspected.
2Door InspectionExamine the microwave door for any issues.Identify door-related problems.Make sure the door closes properly and latches.
3Control Panel CheckVerify the control panel’s functionality.Identifying control panel issues.Look for error messages or unresponsive buttons.
4Interlock System ExaminationCheck if the interlock system is obstructing operation.Identifying interlock-related issues.Ensure the door seals correctly and switches engage.
5Fuse and Circuit InspectionInspect fuses and circuit breakers in the microwave.Identifying electrical problems.Replace blown fuses and reset circuit breakers.
6Check for Error CodesLook for any error codes or unusual display messages.Identifying error-related issues.Consult the user manual for error code meanings.
7Reset MicrowavePower cycle the microwave to reset its functions.Resolving minor glitches.Turn off, unplug, and wait before restarting.
8Contact Customer SupportIf issues persist, contact Whirlpool customer support.Seeking professional assistance.Explain the problem thoroughly for guidance.
9Safety PrecautionsEnsure safety while troubleshooting.Preventing accidents.Unplug the microwave when performing repairs.
10Replacement or Repair ConsiderationEvaluate whether it’s more cost-effective to repair or replace the microwave.Decision-making.Weigh repair costs against the price of a new unit.

Potential Solutions for Whirlpool Microwave Not Starting

IssuePotential Solution(s)Additional Notes
No Power Supply1. Check power outlet and circuit breaker.Ensure the power source is stable.
Door Switch Problem1. Adjust or replace the door switch.A faulty door switch can disrupt operation.
Control Panel Issues1. Reset the control panel.Check for any error messages or codes.
Interlock System Problems1. Adjust or replace interlock parts.Ensure the door closes securely.
Fuse or Circuit Troubles1. Replace blown fuses.Investigate electrical issues if recurrent.

Error Codes and Their Meanings

Error CodeMeaningRecommended Action
E1Door not closed properly.Check and securely close the microwave door.
E2Defective door switch.Replace the door switch if it’s malfunctioning.
E3Control panel malfunction.Restart the microwave or seek professional help.
E4Interlock system issue.Ensure the door closes correctly; adjust parts.
F1Internal electrical problem.Contact Whirlpool customer support for assistance.

Contact Information

Whirlpool Customer SupportPhone NumberWebsiteService Center Locator
Whirlpool Customer Care (US)1-800-253-1301www.whirlpool.comLocate service centers on the website.
Whirlpool Customer Care (Canada)1-800-807-6777www.whirlpool.caCheck the website for nearest centers.
Whirlpool Global Customer SupportVaries by regionwww.whirlpool.com (international)Visit the website for local contacts.


In conclusion, a Whirlpool microwave that won’t start can be due to various issues ranging from simple power supply problems to more complex internal component failures. By following these steps, you can identify and potentially resolve the issue yourself, but if all else fails, don’t hesitate to seek professional assistance to get your microwave working again. Remember that safety is paramount when working with electrical appliances, so exercise caution and, if unsure, consult a professional technician.


Whirlpool Microwave Won’t Start

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