LG Microwave Error F1

⚡ Quick Answer: The LG microwave error code F1 indicates a malfunction in the control board, often caused by stuck or shorted keypad buttons. Symptoms include an unre... ✅ DIY Fixable

What Does Error F1 Mean?

The LG microwave error code F1 indicates a malfunction in the control board, often caused by stuck or shorted keypad buttons. Symptoms include an unresponsive display or buttons, and the error typically appears shortly after attempting to start the microwave or powering it on.

Common Symptoms:

  • Microwave displays F1 and will not start
  • Error appears shortly after pressing START or powering on
  • Buttons may feel stuck or unresponsive

Possible Causes

  • Stuck or shorted keypad buttons (medium)
  • Moisture or contamination on keypad or keypad ribbon connection (medium)
  • Faulty touch control panel or control board communication fault (medium)

How to Fix Error F1

DIY Fix Check and Clear Keypad Issues

  1. Unplug the microwave from the power outlet.
  2. Inspect the front keypad for any stuck or jammed keys.
  3. Gently clean the keypad surface with a soft, slightly damp cloth and dry thoroughly.
  4. Ensure no debris or moisture is present around keypad edges.
  5. Plug the microwave back in and check if F1 persists.

DIY Fix Power Cycle the Microwave

  1. Unplug the microwave for 5–10 minutes to allow the internal electronics to discharge.
  2. Plug it back in.
  3. Observe whether the F1 error reoccurs.

Technician Only Inspect and Repair Keypad Ribbon and Control Panel

  1. Disconnect power and remove external cover to access control assembly.
  2. Inspect the ribbon cable from the keypad to the control board for corrosion, damage, or contamination.
  3. Clean or replace ribbon connectors and reseat firmly.
  4. Test keypad and control panel function.
  5. Replace the keypad or control board if faulty.

Parts needed: Keypad/touch control panel assembly, Keypad-to-board ribbon cable, Main control board (if needed)

🛑 When to Call a Pro:
  • If F1 persists after cleaning and power cycling
  • If internal inspection shows damaged ribbon or failed control board
  • If you are uncomfortable opening or servicing electronic components

Next step

Choose the next step for F1

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Based on diagnostic data

Most relevant component to inspect

User Interface Board

Receives button or touch input and controls the appliance display and indicators.

Typical part-only price
$70 - $220
DIY difficulty
Medium
Estimated time
20-60 mins
Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

Other parts options

Check related components first; use model search as a fallback.

Possible related component

Ribbon Cable

Carries low-voltage signals between a user interface, display, and electronic control board.

$10 - $80 · Medium · 20-60 mins

Check fit & price
Possible related component

Main Control Board

The central brain of the appliance that controls all components, cycles, and timings.

$120 - $280 · Medium · 20-40 mins

Check fit & price
Model number required

Model-compatible Microwave parts

Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.

Find a part that fits my model

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.

Technical Specifications

wattage 1000W
component Control Board
resistance N/A
part_number LG EBR73655601
voltage_rating 120V AC

Common Questions

What does F1 error mean on lg microwave?

F1 error means a control board malfunction, often due to stuck buttons or keypad issues.

Can I fix lg microwave F1 error myself?

Yes, you can check for stuck keys and power cycle the microwave to potentially resolve the issue.

How much does it cost to fix F1 error?

Repair costs vary depending on parts, typically involving keypad or control board replacement.

When should I call a technician for F1?

Call a technician if the F1 error persists after DIY fixes or if you're uncomfortable with repairs.

Sources & References

Data last verified: 2026-07-26

User Comments (0)

Share your experience or solution below.

Be the first to comment!