If you’re seeing a W08 error on your washing machine, don’t panic—it’s a temperature sensor fault, and in many cases, the issue is easy to diagnose. This error means the washer can’t properly detect or regulate water temperature, which can stop the cycle or lead to incorrect wash settings.
The good news? With a few simple checks, you might be able to fix the issue yourself before calling a professional.
What Does the W08 Error Code Mean?
The W08 error code tells you the washer’s temperature sensor (also called a thermistor) isn’t working as expected. Because temperature control is vital for effective washing—especially for killing bacteria in hot washes or protecting delicate fabrics—the machine will trigger this code when readings don’t make sense.
Common symptoms of a W08 error include:
Cycles stopping mid-way.
Water not heating properly.
Cold water being used for a hot cycle (or vice versa).
The washer refusing to start at all.
Common Causes and DIY Fixes
Here are the most frequent reasons for a W08 temperature sensor error and the steps you can take to resolve them.
1. Incorrect Hose Connections
The Cause: This is a surprisingly common reason for a W08 error, especially after moving or installing a new unit. The hot and cold water hoses are connected to the wrong ports, confusing the internal sensors.
The Fix:
Turn off the water supply.
Check the back of the washer: ensure the hot water hose goes to the hot inlet and the cold hose to the cold inlet.
Swap them if they are reversed.
Turn the water back on and run a test cycle.
2. Faulty Temperature Sensor (Thermistor)
The Cause: The sensor may be damaged, dirty, or sending incorrect resistance readings to the control board.
The Fix:
Unplug the washer.
Locate the sensor (it is usually found near the heater element or the base of the tub).
Inspect the sensor for corrosion, loose wires, or visible physical damage.
Pro Tip: Advanced users can test the thermistor with a multimeter to see if it shows the correct resistance values specified in the service manual.
3. Wiring Issues
The Cause: A broken, pinched, or burnt wire between the temperature sensor and the main control board can cause false readings or a total loss of signal.
The Fix:
Inspect the wiring harness around the sensor and the path to the control board.
Look for disconnected or damaged wires.
Safety First: Do not attempt to repair wiring unless you are trained in electrical safety.
4. Control Board Malfunction
The Cause: If the hoses, sensor, and wiring are all intact, the main control board (the “brain” of the washer) may be misreading the data it receives.
The Fix: There is no safe DIY solution for a control board failure. This component requires professional diagnostic tools to test and replace.
When to Call a Technician
Not all W08 issues can be solved with a quick hose check. You should contact a professional repair service if:
You have confirmed the hoses are correct but the error persists.
The washer still gives the W08 error even after a system reset.
The machine is overheating or using dangerously high temperatures.
You are uncomfortable testing electrical components like the thermistor or wiring.
A licensed technician will test the sensor’s continuity and the control board’s output to determine the exact part that needs replacement.
Conclusion
The W08 error code signals a temperature sensor issue—often caused by reversed hoses, a faulty thermistor, or minor electrical glitches. By checking the basics first, you can often save time and money on a service call.
