GE Microwave F4 error code

Microwave

Reviewed August 2025 · sources below

On GE microwaves, error F4 indicates: Open humidity sensor. Start with a 5-minute power reset at the breaker, then follow the microwave-specific checks below before ordering replacement parts for F4. If the code returns on two consecutive cycles after a reset, treat it as a confirmed fault — not a one-time power glitch.

Parts for this repair

We don't yet have a verified exact part number for this model. Search for a compatible Open humidity sensor.

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Safe to keep using?

Use caution

This issue may worsen during use — limit operation and address promptly.

• Microwave high-voltage components can retain lethal charge even when unplugged.

5 product recalls may apply

Brand-level matches — verify your model.

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DIY Difficulty

4 /10MODERATE

DIY difficulty: 4/10 — this repair usually requires electrical testing.

Time: 30–60 minutes

Risk: Moderate

Skill: Intermediate

Tools: Screwdriver, Adjustable pliers, Multimeter, Flashlight, Work gloves

Power disconnect required

Likely causes

Most likelyUser-serviceable issue

Many codes resolve with cleaning, resetting, or reconnecting.

Check: Power-cycle the appliance and check for obvious blockages or loose connections.

Est. cost: $0–$0

PossibleFailed component

Wear or electrical failure of an internal part.

Check: If basic checks fail, the faulty component likely needs replacement.

Est. cost: $0–$100

Repair or Replace?

DIY repair

$35–$65

Professional repair

$223–$302

Comparable replacement

$723–$977

Our recommendation

REPAIR LIKELY MAKES SENSE

REPAIR LIKELY MAKES SENSE. Professional repair ($223–$302) is well below replacement cost.

How old is your appliance?

Actual repair and replacement costs vary by model, location, labor rate, and condition.

What it means

Open humidity sensor.

How to fix it

Unplug the microwave and wait at least 5 minutes — high-voltage components can hold a lethal charge even when unplugged.
Reset GE F4: leave power off for 5 minutes, restore power, then restart. Confirm whether F4 returns.
Check the most common cause for F4: Open humidity sensor.
Inspect the control pad for stuck keys, damaged membrane switches, and loose ribbon cable connections.
If a reset and basic checks don't clear the code, use our lookup tool for AI-powered diagnosis or contact a qualified technician.
Reassemble, restore power, and run a test cycle. If F4 returns, the faulty component likely needs replacement.

Call a pro when: Call a technician before opening the cabinet — microwave high-voltage parts can retain a lethal charge even when unplugged. Also call if you smell burning, see sparking, or the code returns after a reset.

Repair videos

F4 Error on GE Microwave | How to fix

F2 F3 F4 Error GE Oven | How to Fix

GE Microwave 'Typical' Problem & Repair when it Doesn't Work

User manuals

Start with the official support page, then use the search options if that link has moved. You’ll usually need your model number.

OfficialGE appliance manuals

Find your model number, then download manuals from GE support.

Manual librarySearch GE Microwave manuals on ManualsLib

Free scanned manuals — search results, not a guaranteed match.

Web searchSearch the web for GE Microwave user manual

Useful when manufacturer pages move or don’t list older models.

FAQ

What does F4 error code mean on a GE microwave?

Open humidity sensor.

How do I reset GE microwave F4?

Unplug the microwave or switch it off at the breaker for 5 minutes, then restore power and restart. A reset clears a stored F4 after a glitch, but the code will return if the underlying fault is still present.

What part do I need for GE F4?

Not always — some F4 errors are caused by user-fixable issues like clogs or unbalanced loads. Try the troubleshooting steps first.

Can I fix GE error F4 myself?

Basic resets and stuck-key checks are DIY-safe. Do not open the microwave cabinet or discharge the high-voltage capacitor yourself — call a qualified technician for internal repairs.

GE F4 on specific models

JVM3160RFSS F4

Other GE Microwave codes

GE F1 GE F2 GE F3 GE SE GE F5M GE F6

Prevent this problem next time

Follow manufacturer maintenance schedule
Address small issues before they worsen

Sources

Manufacturer meaning

Open humidity sensor.

FixApplianceCode guidance

Start with basic checks for GE F4 before ordering parts.

Source type: Part database

Source: ModelPartFinder + FixApplianceCode editorial

Last reviewed: 2026-09-24

Repair guidance is for informational purposes only. We do not guarantee that any fix will resolve your issue, and you assume all risk when following these steps. Terms & disclaimer

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