What F03 actually means
The machine can't get a sensible reading from the sensor that measures the water temperature, so it has stopped the programme.
Inside the drum housing is a small probe that tells the control board how hot the water is. When that reading goes missing or reads out of range, the machine shuts the cycle down rather than risk heating blind. It's a fault in the sensor or its wiring, not something caused by how you load or use the machine.
What F03 looks like on a Teknix washing machine
Most people find this page having searched for what the machine is doing rather than the code itself. On a Teknix washing machine, F03 usually shows up as one or more of these:
- Not heating the water
- Washing coming out cold
- Cycle takes far longer than it should
- No function at all
- Dead — nothing lights up
- Lights flashing and nothing happening
- Programme won't start
- Machine tripping the electrics
Recognise any of those? That is this fault, and the rest of this page explains what causes it and what you can check yourself.
What usually causes it
- Faulty temperature sensor in the tub
- Loose or corroded connection to the sensor
- Damaged wiring between the sensor and control board
- Control board fault misreading the sensor
- Moisture or scale damage around the sensor
What you can safely check yourself
Work through these in order. Anything beyond this — panels off, testing parts, anything to do with the wiring — is an engineer's job, and not one to attempt with the machine plugged in.
- Turn the machine off at the wall for a minute, then switch it back on and start a short cycle to see if the code returns
Common questions about Teknix F03
What does F03 mean on a Teknix washing machine?
The machine can't get a sensible reading from the sensor that measures the water temperature, so it has stopped the programme. Inside the drum housing is a small probe that tells the control board how hot the water is. When that reading goes missing or reads out of range, the machine shuts the cycle down rather than risk heating blind. It's a fault in the sensor or its wiring, not something caused by how you load or use the machine.
Can I fix Teknix F03 myself?
There are 1 check you can safely do yourself first.
- Turn the machine off at the wall for a minute, then switch it back on and start a short cycle to see if the code returns.
This one usually needs an engineer once you have tried them.
How much does it cost to repair Teknix F03?
£66 including VAT for an engineer to come out and diagnose it, or £84 in total including VAT if it is put right on the visit and no parts are needed. Any parts needed are quoted on site before we fit them — you decide. Every repair carries a 90-day workmanship guarantee.
Tried the checks and it's still showing F03?
This one usually needs an engineer once you have tried the checks above. Then it wants someone who can open it up.
What it costs, before you call: the price is the same whatever the fault turns out to be — £66 including VAT for an engineer to come out and diagnose it, or £84 in total including VAT if it is put right on the visit and no parts are needed. Any parts needed are quoted on site before we fit them — you decide. Every repair carries a 90-day workmanship guarantee.
Our own engineers, not a call centre. We cover Nottinghamshire, Derbyshire and Leicestershire — most washing machine faults are seen same day or next day.
Call 0115 648 0929 Book online — postcode and number is all we need
Outside our area? The explanation above still stands — take it to a local engineer and tell them the code. Knowing it saves them time and you money.
Other Teknix washing machine codes
All Teknix fault codes and repairs →
What this looks like when it happens
- washing machine making a loud noise
- washing machine not heating the water
- washing machine will not turn on
- washing machine beeping or bleeping