Help & Advice Self Repair Fault Codes Laundry Fault Codes Panasonic NA Series Washing Machine Fault Codes
17 January 2012

Panasonic NA Series Washing Machine Fault Codes

This set of fault codes is for the Panasonic washing machines that start with NA in the model number and the error code is displayed in the main LCD display of the washing machine.

When an error or fault is detected the on the washing machine the program will be halted and the warning buzzer will sound then the letter U or H will be displayed alternately with the error number whihc forms the fault code.

Panasonic Washing Machines Using These Error Codes

NA-168VX2, NA-168VG2, NA-148A2, NA-128VA2, NA-147VB2, NA-16VX1, NA-16VG1, NA-14VA1

Before you start any investigation of the fault or even remove the lid of the washing machine or washer dryer please read and fully understand this article in full and pay particular attention to the safety and information notices at the bottom of this page as they contain extremely important information!

Please remember to support our site by buying Panasonic spares from our store here and, if you decide that you really need an engineer please support the local repairers that help make this site possible, you can search for a repairer from the link below.

It is worth noting that at the time of writing that Pansonic spares are very hard to get indeed and that engineers have limited access to both spares and technical support. This may lead to difficulty in obtaining spare parts and also service other than from Panasonic themselves.

It is also worth pointing out that Panasonic, on this range, use spare parts that have attached connectors on them. This means that using pattern parts is not possible, you will only have the option of Panasonic spares with no alternative.

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Panasonic Washing Machine Fault Codes

These fault codes are written for washing machine repairers and not for the general public by Panasonic and they assume a certain level of competence on the part of the user in diagnostic routines. We have added some notes to try to assist you in determining the nature of the fault you have but, you will still need to investigate each failure on its own merits. For more help and advice on fault finding on a washing machine please refer to our basic fault finding guide from this link before you begin.

Please check that any Panasonic washing machine spares recommended are suitable for use on your particular model and serial number. If you are unsure about the suitability of any spare part please ask to ensure that you get the correct spares for your washing machine or washer dryer. Please, don't guess or assume as spares can be altered on a production run with the same model number having several different alternative components used.

U11
The washing machine cannot drain
  • Check that filter is not blocked or obstructed
  • Check drain hose is clear of any blockage or obstruction
  • Check wiring to drain pump
  • Check drain pump is not defective
  • Check level sensor or switch
  • Check wiring to level sensor

U12
The door is being read as being open
  • Check door is closed
  • Check doorlatch etc.
  • Check door lock
  • Check wiring
  • Check electronic controller

U13
An unbalanced load is detected in the washing machine
  • Check load, sort and restart spin
  • Check belt if fault persists
  • Check motor if fault persists

U14
Washing machine fails to fill in twenty minutes
  • Check mains water pressure
  • Check inlet hoses for kinks
  • Check inlet filter
  • Check water inlet valve
  • Pressure switch fault
  • Wiring fault

U18
Pump or drain filter detected as being not secure
  • Check that filter is secure
  • Check wiring if fault persists

H01
Pressure sensor or level switch detected as out of range
  • Check wiring to level sensor
  • Check pressure switch is not defective
  • Replace pressure sensor
  • Replace main power PCB

H04
Short circuit detected on the power relay of the main electronic control board
  • Check wiring
  • Replace electronic control PCB

H05
Data not being saved to the electronic controller
  • Check wiring
  • Replace electronic control PCB
  • Check mode B in service mode

H07
Tacho generator signal from motor irregular or out of range
  • Check wiring to motor tacho
  • Check motor wiring
  • Replace motor
  • Replace electronic control PCB

H09
Communication error between power and display electronic cards
  • Check wiring between the electronic cards
  • Check electronic controllers

After this there is no option but to replace either or both cards as it is not possible to acertain which one is faulty on these washing machines.

H17
Wash thermistor or temperature sensor detected abnormal signal or out of range
  • Check wiring to temperature sensor 
  • Check temperature sensor
  • Replace temperature sensor

H18
Motor thermistor sensor detected abnormal signal or out of range
  • Check motor connections
  • Replace motor

H21
Pressure sensor detects water level increasing from water supply
  • Clean the diaphram of water inlet valve
  • Check inlet valve operation
  • Repalce water inlet valve

H23
Heater relay on main control PCB detected abnormal or out of range
  • Check electronic controller
  • Replace main power electronic card

H25
Motor error detected
  • Check wiring to main motor
  • Replace motor
  • Replace power electronic card if problem persists

H27
Door lock on the washing machine will not engage with latch in place
  • Check wiring to door lock
  • Check door lock
  • Replace door lock
  • Replace main electronic controller if problem persists

H29
Cooling fan detected as running slow, abnormal, short or open circuit
  • Check wiring and connector to the cooling fan
  • Replace cooling fan
  • Replace main electronic controller if problem persists

H41
During spoin data cannot be obtained from 3D sensor
  • Check wiring to 3D sensor
  • Replace 3D sensor
  • Replace main electronic controller if problem persists

H43
Leak detected to base of the washing machine
  • Check for source of the leak

H46
Abnormal signal from leak detector in base of the washing machine
  • Check wiring to sensor
  • Check sensor
  • Replace main electronic controller is advice from Panasonic

H52
Too high input voltage detected
  • Check mains electricity supply as this is caused by abnormal mains

H53
Too low voltage input detected

  • Check mains electricity supply as this is caused by abnormal mains

H55
Abnormal current detected while the main motor is rotating
  • Replace main drive motor

More Panasonic Washing Machine Help, Advice And Guidance

Should you need more help and guidance please use the links from this article as most of them will help you to understand your Panasonic washing machine a lot better and probably very much help you in diagnosing the fault you have. Of course there are many other articles on the site that will also help you do this.

In addition you can post in our help and advice forums after registering but please do pay heed to the information below before doing so and read the guides, they are there to help you.

You must understand certain things before you begin or attempt any repairs on your own and we want to make these points very, very clear to anyone that decides to investigate one of these or any other washing machines:

      • We are not responsible for your safety, you are and by using this guide you accept that and accept that any damage that you may cause and work undertaken is entirely at your own risk.
      • We will advise the common causes of the fault codes but we cannot guarantee that any parts or work recommended will resolve the issue. It is entirely your responsibility to diagnose your particular problem and resolve it.
      • We are not responsible for you buying spares that do not resolve the problem, this is down to your own diagnosis not ours.
      • No warranty is inferred, implied or given.
You also have to understand that fault or error codes are not a "magic bullet", they will not tell you what the problem is, they will only offer you an indication of where the problem lies and they are no substitute for good old fashioned diagnostic skills. You can find out more about what fault codes actually tell you in this article. So please be well aware that, even with this new found knowledge you will still have to actually be capable of investigating and diagnosing the problem and this means adhering to basic appliance safety for working on them. As, if you don't and tell the engineers in the forums that you hooked up components to a live feed, worked on a live appliance and so on they will be a whole heap less willing to help you in our washing machine forum because they will assume that you are trying to commit suicide and are not safe working on your machine.

Please do note that manufacturers can and do change fault codes without notice and we cannot guarantee that these error codes will apply to your particular model as all codes apply to a wide range of appliances and not normally any one specific model. To determine if these fault codes do apply to your particular Panasonic washing machine or washer dryer model please post a request to confirm this in the forums.

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