How to Fix Electrolux Automatic Washing Machine Error Codes

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How to Fix Panasonic Washing Machine Error Code List

🔧 WasherFixers Expert Team 📅 May 2026 ⏱ 15 Min Read 🌍 NA-Series All Models

Panasonic NA-series washing machines are intelligent, well-built appliances — and when something goes wrong, they tell you exactly where to look. I have been repairing Panasonic machines for over 20 years, including 5 years of field service in the Middle East. Every error code below comes from real diagnostic work, not a spec sheet.

— Click any error code to jump straight to the full fix —

U11 U12 U13 U14 U18 U99 H01 H04 H05 H07 H09 H17 H18 H21 H23 H25 H27 H29 H41 H43 H46 H51 H52 H53 H55

🔍 Understanding Panasonic NA-Series Error Codes — Read This First

Panasonic NA-series washing machines use a two-letter prefix system for all error codes. The U-series codes (U11, U12, U13, U14, U18, U99) are operational warnings — the machine detected a problem it can communicate clearly, and many of them are fixable at home. The H-series codes (H01, H04, H07, H09, H17, H21, H27 and so on) are internal hardware faults — these require a qualified technician with the right diagnostic tools.

When an error is detected, Panasonic machines halt the programme and sound a warning buzzer. The display then alternates between the letter (U or H) and the number — for example, "U" then "11" flashing in sequence. This is your fault code: U11.

⚠️ Safety Rule — Non-Negotiable: Before checking any hose, filter, or internal component, disconnect the machine from the wall socket completely. Remove the plug physically — do not just press the power button. Panasonic themselves note in their service documentation that competence is assumed when working on these machines. If you are not confident, call a qualified engineer.

💡 First Step for Any Error: Disconnect the power plug from the wall socket. Wait 5 full minutes. Plug back in and press Power. This hard reset clears temporary faults and is always worth trying before deeper investigation.

Applies to models: NA-168VX2, NA-168VG2, NA-148A2, NA-128VA2, NA-147VB2, NA-16VX1, NA-16VG1, NA-14VA1, NA-FS95G3, NA-F100A1, NA-F135X1, and other NA-prefix models.

📋 Panasonic Error Code Index — Click to Jump

U11 Machine Cannot Drain U12 Door Detected as Open U13 Unbalanced Load Detected U14 Failed to Fill With Water U18 Drain Filter Not Secure U99 Water Forcibly Drained H01 Pressure Sensor Out of Range H04 Power Relay Short Circuit H05 Memory / IC Data Fault H07 Motor Tacho Signal Fault H09 PCB Communication Error H17 Wash Temperature Sensor Fault H18 Motor Thermistor Fault H21 Overflow / Inlet Valve Fault H23 Heater Relay Fault H25 Motor Error H27 Door Lock Cannot Engage H29 Cooling Fan Fault H41 3D Sensor Fault During Spin H43 Leak Detected at Base H46 Leak Detector Abnormal Signal H51 Motor Overload Detected H52 Input Voltage Too High H53 Input Voltage Too Low H55 Abnormal Motor Current

U-Series — Operational Warning Codes

U11

Panasonic Washing Machine Error U11 — Cannot Drain Water

Most common Panasonic error — drain filter, hose, or pump issue

🚨 High ▼

U11 is the most frequently occurring Panasonic washing machine fault I encounter in the field. The machine attempted to drain water from the drum but the water is not leaving within the expected time. In over 60% of U11 cases I have dealt with, the drain pump filter is the culprit — blocked with coins, buttons, hair clips, or lint. It is almost always the first thing to check, and it usually solves the problem completely.

🔍 Possible Causes

• Drain pump filter blocked with debris
• Drain hose kinked or crushed behind the machine
• Drain hose outlet too high — back pressure on pump
• Household drain blocked at sink or standpipe
• Drain pump motor failed or impeller jammed
• Wiring fault to drain pump
• Level sensor or pressure switch fault

✅ Home Checks — In This Order

• Clean drain pump filter — always first
• Check drain hose end to end for kinks
• Confirm drain hose height and position
• Test household drain is clear
• Hard reset — unplug 5 min, plug back in
• Listen for pump — is it running or silent?

🔧 Step-by-Step U11 Fix

1Unplug the machine: Safety first — remove the plug from the wall socket. Do not just switch off the machine button.

2Drain remaining water: Open the small access panel at the front bottom of the machine. Use the emergency drain hose (thin rubber tube) to drain residual water into a flat tray. This prevents a flood when you open the filter cap.

3Clean the drain pump filter: Unscrew the filter cap counter-clockwise. Remove the cylindrical filter and rinse it thoroughly under warm water, brushing away all lint, hair, coins, and fabric pieces. Also check inside the filter housing with a torch — debris collects there too. Reinstall the filter tightly.

4Check the drain hose: Pull the machine forward and inspect the entire drain hose from the machine to the standpipe or sink. No kinks, no sharp bends. The hose outlet should not be pushed more than 15 cm into the standpipe — too deep causes siphoning where water drains back in constantly.

5Test the household drain: Pour a bucket of water down the sink or standpipe the machine drains into. It should flow freely. A sluggish household drain will cause U11 no matter how well the machine itself is working.

6Plug in and run a drain cycle: Once all checks are done, plug in and select a drain or spin-only cycle. You should hear the pump running. If it hums but does not drain — the hose or standpipe is still blocked. If the pump is silent — the pump motor may have failed and needs testing.

💡 From the Field: I worked on a Panasonic NA-148A2 in London that had persistent U11. Filter was clear, hose was fine. The problem was a partial blockage 40 cm inside the building's shared standpipe — not visible and not the machine's fault at all. A plumber's snake cleared it in 10 minutes. Always check the household drain before calling an appliance engineer.

⚙ Technician Testing

• Drain pump winding resistance — typical range for Panasonic pumps is 100–250 Ω
• Apply 220V directly to pump terminals — confirm mechanical operation
• Check pump impeller rotation through filter opening with a torch
• PCB drain relay output voltage test during drain cycle
• Level sensor wiring continuity and pressure switch function test

↑ Back to error code list

U12

Panasonic Washing Machine Error U12 — Door Detected as Open

Machine will not run — door is not closing or latch is not engaging

⚠️ Medium ▼

U12 means the Panasonic machine's door sensor is not confirming a secure, locked closure. The machine will not begin or resume any programme until the door lock engages. This is a fundamental safety requirement on all Panasonic front-loaders. In many cases, the door simply was not closed firmly enough — the latch needs a definite push to click into the lock mechanism. Check for fabric caught in the seal before assuming the lock is faulty.

🔍 Possible Causes

• Door not fully closed — not pushed hard enough
• Clothing or object caught in door seal
• Door latch worn or cracked
• Door lock switch (interlock) failed
• Door lock wiring connector loose or damaged
• Machine not level — door frame misaligned
• Main PCB door lock circuit fault

✅ Home Checks

• Close door firmly — push until you hear the click
• Check rubber gasket seal for trapped garments
• Inspect door latch for cracks or wear
• Check machine is sitting level on the floor
• Hard reset — unplug 5 min, replug, retry
• Persist → door lock interlock needs testing/replacing

⚙ Technician Testing

• Door lock resistance test — open circuit indicates failed interlock
• PCB door lock relay output test during start attempt
• Wiring harness continuity from PCB to door lock connector
• Physical inspection of latch strike plate alignment

Never bypass the door interlock: Panasonic door locks are safety-critical. Bypassing them exposes you to risk of injury during spin. Always replace a faulty door lock rather than working around it.

↑ Back to error code list

U13

Panasonic Washing Machine Error U13 — Unbalanced Load

Laundry unevenly distributed — machine paused spin to protect itself

✅ Low ▼

U13 is Panasonic's unbalanced load warning. The machine detected excessive drum vibration during the spin phase — the laundry is concentrated to one side. Rather than spinning an unbalanced load at high speed (which would damage the drum bearings, suspension, and cabinet over time), the machine paused itself. No parts are broken. Open the door, redistribute the laundry evenly, and restart the spin.

🔍 Why U13 Appears

• Heavy items gathered to one side of the drum
• Washing one large item alone — single duvet, single pair of jeans
• Bedsheets balling up into a tight bundle
• Machine not sitting level on floor
• Worn suspension springs or shock absorbers

✅ Fix in 2 Minutes

• Open door — redistribute laundry evenly around drum
• Untangle balled-up sheets or heavy items
• Add extra items if washing one heavy piece alone
• Check machine is level — adjust feet if needed
• Close door and restart spin cycle

💡 If U13 persists even with balanced loads: According to Panasonic's fault code documentation, if the unbalanced error keeps appearing after redistributing the load, check the drive belt (if belt-driven) and the main motor. On older machines, worn suspension dampers are the more likely cause — they gradually lose their ability to absorb drum movement.

↑ Back to error code list

U14

Panasonic Washing Machine Error U14 — Failed to Fill in 20 Minutes

Water supply problem — tap, hose, inlet filter, or pressure switch

🚨 High ▼

U14 means the machine tried to fill with water for 20 minutes but could not reach the required water level. Panasonic gives the machine a generous 20-minute window — if U14 appears, the supply problem is significant. In the vast majority of cases I have seen, it comes down to one of four things: a closed or partially open tap, a kinked inlet hose, a blocked inlet filter mesh, or low water pressure at the property. All four are straightforward home checks.

🔍 Possible Causes

• Water supply tap closed or not fully open
• Inlet hose kinked or crushed behind machine
• Inlet valve filter mesh clogged with mineral scale
• Low or interrupted water pressure
• Inlet solenoid valve failed internally
• Pressure switch (level sensor) fault
• Wiring fault to inlet valve or pressure switch

✅ Fix Steps

• Open water tap fully — counter-clockwise
• Check inlet hose for kinks — full length
• Disconnect hose and clean inlet filter screen
• Test water pressure — open another tap
• Hard reset and run short cycle to test
• Persist → inlet valve or pressure switch testing

🔧 Step-by-Step U14 Fix

1Check the water tap: Locate the dedicated washing machine tap — usually on the wall directly behind or to the side of the machine. Turn it counter-clockwise until fully open. A partially closed tap is one of the most common causes of U14 I encounter.

2Inspect inlet hose: Pull the machine away from the wall. Trace the full length of the blue or grey inlet hose. Any kink, sharp bend, or compression point reduces water flow enough to trigger U14. If the hose has a permanent kink — replace it.

3Clean the inlet filter mesh: Turn the tap off. Unscrew the inlet hose at the back of the machine. Inside the inlet port is a small mesh filter screen — remove it with pliers and rinse it under warm water. Scale and sediment block this screen, especially in hard water areas.

4Check water pressure: Open a bathroom or kitchen tap fully. If the flow is weak or intermittent, your property has a water supply issue — not the machine. Contact your water supplier if this is persistent.

5Reset and test: Reconnect everything, turn the tap on, plug the machine in and restart. If U14 returns after all these checks — the inlet solenoid valve or pressure switch needs professional testing.

⚙ Technician Testing

• Inlet solenoid valve resistance — typically 4–6 kΩ on Panasonic NA-series models
• Apply 220V directly to valve — should click open and flow water
• Pressure switch function test — apply air pressure with syringe, confirm switching
• PCB fill relay output signal test during fill cycle

↑ Back to error code list

U18

Panasonic Washing Machine Error U18 — Drain Filter Not Secure

Filter not properly installed or machine detecting instability at pump

⚠️ Medium ▼

U18 indicates the machine has detected that the drain pump filter is not properly seated or secure. This happens when the filter cap is not fully tightened after a clean, or when the filter seal is worn and the machine senses the filter is not correctly installed. The fix is usually straightforward — check and retighten the filter. If U18 continues, the filter housing seal may be worn and the entire filter assembly may need replacing.

🔍 Causes

• Filter cap not tightened after last clean
• Filter not seated correctly in the housing
• Filter housing O-ring seal worn — poor seal
• Wiring fault to pump or filter detection sensor

✅ Fix

• Unplug machine — locate filter at front bottom panel
• Remove and inspect filter for cracks or damage
• Check O-ring seal on filter cap — replace if worn
• Reinstall filter and tighten cap clockwise firmly
• Plug in and restart — U18 should clear

💡 Maintenance Note: The filter cap O-ring seal on Panasonic machines can harden and shrink over years of use, especially in hot laundry environments. If U18 appears after correctly reinstalling a clean filter, replace the O-ring seal — it is inexpensive and takes 5 minutes.

↑ Back to error code list

U99

Panasonic Washing Machine Code U99 — Water Forcibly Drained

Machine drained water as a safety response — not a hardware fault

ℹ️ Info ▼

U99 means the machine forcibly drained the water from the drum as a safety measure. This typically happens after a power cut during a cycle, or when the machine detects an unsafe condition and chooses to empty itself before stopping. It is not a component fault — it is the machine protecting your laundry and flooring from a potential overflow situation. Investigate why the cycle was interrupted, then restart normally.

🔍 Why U99 Appears

• Power cut interrupted the cycle mid-wash
• Machine detected an internal fault and drained as safety precaution
• Power supply interruption or voltage spike
• Another fault code triggered the forced drain

✅ What to Do

• Check if power was interrupted — investigate cause
• Hard reset the machine — unplug 5 min, replug
• Check if another error code appears on restart
• Run a new wash cycle and monitor

💡 Tip: If U99 appears frequently without an obvious power interruption, it may be triggered by another underlying fault that causes the machine to drain defensively. Watch for secondary error codes on restart — they will tell you the actual root cause.

↑ Back to error code list

H-Series — Internal Hardware Fault Codes

H01

Panasonic Error H01 — Pressure Sensor Out of Range

Water level sensor giving incorrect or no signal

🚨 High ▼

H01 indicates the pressure sensor (water level sensor) is giving a reading outside the expected range. This sensor tells the control board how much water is in the drum — if it fails, the machine cannot safely fill or drain. According to Panasonic's official service documentation, the checks progress from wiring to the pressure sensor itself, and if both are fine, the main power PCB may need replacing.

🔍 Causes

• Pressure sensor internally failed
• Pressure sensor connecting tube blocked or cracked
• Wiring to pressure sensor loose or damaged
• Main power PCB fault

✅ Home Check

• Hard reset — unplug 5 min, replug
• Check pressure sensor tube — blocked or kinked?
• Blow gently through tube — should flow freely
• Persist → technician required

⚙ Technician Testing (Panasonic Guidance)

• Check wiring to pressure sensor — continuity and connections
• Verify pressure switch is not defective — test at known water levels
• Replace pressure sensor if faulty
• If sensor is fine — replace main power PCB

↑ Back to error code list

H04

Panasonic Error H04 — Power Relay Short Circuit on Main PCB

Short circuit detected on the main electronic control board relay

🚨 High ▼

H04 indicates a short circuit has been detected on the power relay of the main electronic control board. This is a PCB-level electrical fault. After the hard reset procedure (disconnect power plug and reconnect), Panasonic's guidance is to check the wiring first. If wiring is intact, the electronic control PCB needs replacing. Do not attempt to continue running the machine with H04 active.

🔍 Causes

• Power relay on main PCB shorted
• PCB damaged by power surge or voltage spike
• Wiring short circuit feeding incorrect signal to PCB
• Moisture ingress onto PCB

✅ Action

• Hard reset — disconnect plug, wait 5 min
• If H04 clears — use surge protector going forward
• If H04 returns — stop using machine
• Technician: check wiring → replace PCB if confirmed

Stop Operating: H04 indicates an active short circuit in the control board's power circuit. Continuing to run the machine risks escalating damage. Disconnect and do not restart until a qualified engineer has inspected the board.

↑ Back to error code list

H05

Panasonic Error H05 — Memory / IC Data Not Saving

Control board memory circuit fault — PCB likely needs replacing

🚨 High ▼

H05 means the electronic controller is unable to save data to its internal memory (IC). Panasonic's service documentation lists checking Mode B in service mode as a diagnostic step, but for end users this is not accessible without specialist tools. The practical outcome is: check wiring, try a hard reset, and if H05 persists, the electronic control PCB needs replacing.

⚙ Panasonic Official Guidance for H05

• Check wiring connections to and from the electronic controller
• Check Mode B in service mode (technician-level access required)
• Replace electronic control PCB if fault persists after checks

💡 Note: H05 often appears after a power surge or brown-out that corrupts the board's EEPROM memory. A hard reset clears many H05 occurrences that are voltage-related. If H05 returns consistently, the EEPROM chip on the PCB has failed and the board needs replacement.

↑ Back to error code list

H07

Panasonic Error H07 — Motor Tacho Generator Signal Fault

Motor speed sensor signal is irregular or out of expected range

🚨 High ▼

H07 means the tacho generator — the motor speed sensor — is sending an irregular signal to the control board. The tacho is a small sensor that tells the PCB exactly how fast the motor is spinning. When this signal is absent or erratic, the board cannot control wash and spin speeds correctly. The fault could be the tacho sensor itself, the motor wiring, the motor, or the electronic control board.

🔍 Possible Causes

• Motor tacho generator winding failed
• Wiring to motor tacho loose or damaged
• Motor windings internally faulty
• Electronic control PCB motor drive circuit fault

✅ Action

• Hard reset — unplug 5 min, replug
• Technician: check tacho wiring continuity
• Check motor wiring harness
• Replace motor or PCB as indicated by testing

⚙ Panasonic Official Guidance for H07

• Check wiring to motor tacho generator — continuity and secure connections
• Check motor wiring — harness from motor to PCB
• Replace motor if tacho winding is open circuit
• Replace electronic control PCB if motor and wiring test correctly

↑ Back to error code list

H09

Panasonic Error H09 — Communication Error Between PCB Boards

Power board and display board cannot communicate — board replacement likely

🚨 High ▼

H09 is a communication failure between the power electronic card and the display electronic card inside the machine. These two boards must talk to each other constantly — when the connection breaks, the machine cannot operate. This is one of the more difficult Panasonic faults to resolve because, as the original service documentation frankly states, it is not always possible to determine which board is faulty without replacement testing.

🔍 Possible Causes

• Communication wiring harness between boards damaged
• Power board connector loose or corroded
• Display board connector loose or corroded
• Power board failed internally
• Display board failed internally

✅ Action

• Hard reset — unplug 5 min, replug
• If clears — monitor and use surge protector
• Persist → technician required for board testing

⚙ Panasonic Official Guidance for H09

• Check wiring between the power and display electronic cards — connectors seated firmly
• Check electronic controllers visually for burn marks or damaged components
• After wiring checks — replace either or both boards (Panasonic states it is not possible to determine which one is faulty on these models without replacement testing)

💡 Honest Assessment: H09 is one of the harder Panasonic faults to resolve economically. On older machines where board replacement costs approach the machine's replacement value, it is worth getting a full diagnosis and repair cost estimate before proceeding.

↑ Back to error code list

H17

Panasonic Error H17 — Wash Temperature Sensor (Thermistor) Fault

NTC thermistor giving abnormal signal — temperature monitoring failed

⚠️ Medium ▼

H17 indicates the wash water temperature sensor (NTC thermistor) is giving an abnormal or out-of-range reading. This sensor measures the water temperature during the wash and allows the control board to regulate the heater. Without a correct temperature reading, the machine cannot safely heat water and stops. On Panasonic NA-series X models, this code is specifically called out in the service manual.

🔍 Causes

• NTC thermistor failed — open or short circuit
• Wiring to temperature sensor loose or corroded
• Thermistor heavily coated with limescale (hard water)
• PCB temperature input circuit fault

✅ Action

• Hard reset first
• Hard water area — run a descaling cycle
• Technician: test thermistor resistance
• Replace thermistor if out of spec

⚙ Panasonic Official Guidance for H17

• Check wiring to temperature sensor — continuity and connections
• Check temperature sensor resistance at known temperature
• Replace temperature sensor if reading is incorrect or open circuit

↑ Back to error code list

H18

Panasonic Error H18 — Motor Thermistor Sensor Fault

Motor temperature sensor giving abnormal reading — motor overheating protection

🚨 High ▼

H18 is the motor thermistor fault — the temperature sensor on the motor itself is giving an abnormal signal. This sensor protects the motor from damage due to overheating by feeding real-time temperature data to the control board. If the sensor fails, the board cannot monitor motor temperature and shuts down the machine. Panasonic's guidance points to checking motor connections first, then replacing the motor if the fault persists.

🔍 Causes

• Motor thermistor failed — open or short circuit
• Motor connector wiring loose or damaged
• Motor genuinely overheating — mechanical issue
• PCB motor input circuit fault

✅ Action

• Hard reset — unplug 10 min (allow motor to cool)
• Technician: check motor connections
• Replace motor if connections are fine

⚙ Panasonic Official Guidance for H18

• Check motor connections — harness firmly seated at both motor and PCB ends
• Replace motor if H18 persists after connection checks

↑ Back to error code list

H21

Panasonic Error H21 — Overflow / Water Inlet Valve Fault

Pressure sensor detecting rising water level — inlet valve stuck open

🚨 High ▼

H21 means the pressure sensor is detecting the water level rising when it should not be — specifically from the water supply side. This typically indicates the water inlet valve diaphragm is not closing properly and water is trickling in even when the valve should be off. The machine stops to prevent an overflow. Panasonic's official fix procedure focuses on the inlet valve diaphragm and the valve itself.

🔍 Causes

• Inlet valve diaphragm clogged — valve not closing fully
• Inlet valve solenoid failed — stuck open
• Water pressure too high — forcing valve open
• PCB inlet relay stuck ON

✅ Action

• Turn off water supply tap immediately
• Hard reset machine
• Technician: clean inlet valve diaphragm
• Check and replace inlet valve if needed

⚙ Panasonic Official Guidance for H21

• Clean the diaphragm of the water inlet valve — debris prevents full closure
• Check inlet valve operation — confirm it closes fully when de-energized
• Replace water inlet valve if cleaning does not resolve the fault

Turn Off Water Tap: If H21 appears, turn the machine's water supply tap off until the fault is resolved. A stuck-open inlet valve with an active water supply will continue filling the drum unsupervised, which can lead to flooding.

↑ Back to error code list

H23

Panasonic Error H23 — Heater Relay on Main PCB Abnormal

Heating element control relay fault — machine cannot heat water safely

🚨 High ▼

H23 indicates the heater relay on the main control PCB is giving an abnormal or out-of-range signal. This relay is what switches the heating element on and off. When the relay fails — either stuck open (no heating) or stuck closed (continuous heating) — the machine stops as a safety measure. Panasonic's guidance for H23 points directly to the electronic controller as the solution.

⚙ Panasonic Official Guidance for H23

• Check electronic controller — inspect for visible damage or burn marks
• Replace main power electronic card (PCB)
• This is a board-level fault — no DIY repair options exist for the relay itself

💡 Cold Wash Workaround: On some Panasonic models, if H23 appears only on heated programmes, you may be able to continue using the machine on cold wash (30°C or below) while arranging a repair. The heater circuit is bypassed at cold temperatures. Confirm this works on your specific model before relying on it.

↑ Back to error code list

H25

Panasonic Error H25 — Motor Error Detected

Main drive motor fault — wiring, motor, or PCB issue

🚨 High ▼

H25 is a general motor error — the machine has detected a fault in the main drive motor system. This is different from H07 (tacho signal) — H25 indicates a broader motor operation failure. Panasonic's docum

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