Daewoo Microwave: not stopping

Professional Repair Guide

What is this symptom?

Is your Daewoo microwave running continuously even after the timer ends or when you open the door? This frustrating issue can be caused by a faulty door interlock switch, a malfunctioning control board, or even a cooling fan that operates normally but is misinterpreted as the microwave not stopping. Understanding these causes can help you troubleshoot effectively.

Urgency: High

Important Tips for Daewoo Models

Official Daewoo troubleshooting documentation for this symptom is not readily available; universal causes apply

Possible Causes

Faulty door interlock/door switch

How to Identify: Microwave runs even when the door is opened or door removal/press doesnâ€™t stop operation

Part: Door interlock switch (safety switch)

Malfunctioning control board (main PCB)

How to Identify: Microwave doesnâ€™t respond to control inputs, stops not triggered by timer finish, erratic behavior

Part: Control board / smart board

Cooling fan continues running (normal behavior) misinterpreted as microwave not stopping

How to Identify: Microwave display off but fan runs for a period after cooking to cool components

Part: Cooling fan / internal thermal system

Stuck control panel/timer circuit

How to Identify: Microwave wonâ€™t accept inputs or timer doesnâ€™t advance, continuous operation

Part: Keypad/timer control circuit

DIY Solutions

Check door interlock switches

Advanced 20-40 minutes

Tools Needed: screwdriver set, multimeter

Unplug microwave and open service panel
Visually inspect and test door switches for continuity with multimeter
Replace defective interlock switch with correct replacement part

⚠️ Safety First: High voltage capacitors retain charge; ensure discharged before working inside

Power reset and control panel reset

Easy 5 minutes

Tools Needed: none

Unplug microwave for 5â€“10 minutes
Plug back in and test if normal stop behavior returns

⚠️ Safety First: Ensure microwave is unplugged before leaving unattended

Professional Repairs

Control board replacement or repair

Estimated Cost: $120 - $300

Interlock switch assembly replacement

Estimated Cost: $30 - $90

When to Call a Professional

Microwave continues running even with door open

Unplugging and resetting does not resolve

You are not comfortable working inside appliance

Preventive Maintenance

Clean and exercise door latches/switches: Door switch sticking or misalignment that can cause sensor faults
Frequency: monthly
Power reset after unusual behavior: Control board glitches leading to incorrect operation
Frequency: as needed

Frequently Asked Questions

Why is my Daewoo Microwave not stopping?

Common causes include a faulty door interlock switch, a malfunctioning control board, or normal cooling fan operation.

How do I fix Daewoo Microwave not stopping myself?

Try unplugging the microwave for a reset, or check door interlock switches for continuity with a multimeter.

How much does it cost to fix not stopping?

Professional repairs range from $30 to $90 for interlock switch replacement and $120 to $300 for control board repair.

When should I call a technician for not stopping?

Contact a technician if DIY solutions fail, as the issue may require advanced repairs.

References & Sources

How to Fix a Microwave That Wonâ€™t Stop Running? Community

Community Analytical Insights

Analysis based on real user discussions from appliance repair communities

Can I Fix This Myself?

65%

DIY Success Rate Difficulty: Either

Common Issues Reported by Users

Faulty door switch preventing the microwave from stopping when the door is opened.
Malfunctioning timer or control board that fails to send the stop signal.
Stuck or damaged relay that keeps the microwave running continuously.

User Suggested Solutions

Inspect and replace the door switch. Unplug the microwave, remove the outer casing, locate the door switch, and test it with a multimeter. If faulty, replace it with a new switch.
Reset the microwave by unplugging it for 5 minutes and then plugging it back in. This can sometimes resolve minor control board issues.
Test and replace the control board if the timer is malfunctioning. This requires removing the microwave from the wall, accessing the control board, and testing it with a multimeter for continuity.