How to repair a washing machine with a faulty sensor?

How to Repair a Washing Machine with a Faulty Sensor

A faulty sensor in a washing machine can stop the machine from working properly. It may show wrong readings, get stuck in a cycle, or not start at all. Modern washing machines use several sensors to check water level, temperature, load size, and spin speed. If any of these sensors fail, the machine may stop mid-cycle or display an error code.

Below is a simple guide on how to repair a washing machine with a faulty sensor.

Identify the Faulty Sensor

Step 1: Check for error codes
Most washing machines show error codes on the display when there is a problem. Refer to your machine’s manual or search online for the meaning of the code. Some common codes relate to:

• Water level sensor (pressure switch)

• Temperature sensor (thermistor)

• Door sensor

• Motor sensor (Hall sensor)

Step 2: Observe the symptoms
If there is no code, look for signs like:

• Water not filling or overfilling

• Drum not spinning

• Water not heating

• Cycle not starting

These signs can help point to the sensor causing the problem.

Turn Off Power and Water Supply

Before any repair, unplug the machine from power. Turn off the water supply. This is for safety. Never work on an electrical appliance while it is still connected to power.

Access the Sensor

Water Level Sensor (Pressure Switch):
Usually located at the top of the machine, near the control panel. It has a small rubber or plastic hose attached to it.
To access:

• Remove the top or back panel

• Find the round pressure switch

• Disconnect the hose and wires

Temperature Sensor (Thermistor):
Located near the heating element or inside the drum.
To access:

• Remove the back panel

• Look for a small metal probe with wires going to the control board

Door Sensor (Door Lock Switch):
Located inside the door frame.
To access:

• Open the door

• Unscrew the front panel or door frame

• Pull out the switch carefully

Motor Sensor (Hall Sensor):
Located at the back of the drum motor.
To access:

• Remove back panel

• Look for a small sensor mounted on the motor

Test the Sensor

You will need a multimeter to test if a sensor is working.

• Set the multimeter to continuity or resistance mode

• Disconnect the sensor wires

• Place probes on the sensor terminals

• If the reading is out of the expected range (check manual or manufacturer’s site), the sensor is faulty

For example:

• Thermistors usually read between 10k–30k ohms at room temperature

• Door switches should show continuity when closed

Replace the Faulty Sensor

If the sensor is faulty, it must be replaced. Most sensors are not expensive and can be found online or at appliance parts stores.

Steps:

• Buy a matching sensor (use the model number of your machine)

• Remove the faulty one

• Install the new sensor carefully

• Connect the wires exactly the same way

Reassemble and Test the Machine

After replacing the sensor:

• Put the panels back in place

• Plug in the power

• Turn on the water supply

• Run a short wash cycle to test

Check if the problem is gone. If the machine works correctly, the repair was successful.

When to Call a Technician

If you cannot identify the faulty sensor or if you are not confident in handling electronics, it is better to call a trained technician. Some repairs require special tools or advanced knowledge.

Final Advice

To avoid sensor failure:

• Clean your machine regularly

• Avoid overloading

• Use the right detergent

• Check water pressure and filters

Faulty sensors are a common issue, but with basic tools and care, you can repair them. Always follow safety procedures, and check the manual for model-specific instructions

Are you facing issues with your washing machine in Nairobi? Don't worry, as professional washing machine repair services in the bustling capital city of Kenya are readily available to assist you. Whether you're a homeowner or a business owner, a broken washer is bad.