AWB fault code F 15
Fault code F 15 on an AWB boiler (including ThermoMaster) means: Fault in diverter valve stepper motor. Check wiring. If in order, replace the diverter valve. Reset the appliance once. If the code comes back, a part is usually faulty. You can check the water pressure and settings yourself; leave work on gas-carrying parts to a certified gas engineer.
After a safety alert (gas, flue gas, combustion), reset no more than once and call in a certified gas engineer. If you smell gas, call your national gas emergency number or 112 immediately.
Cause
Fault code F 15 on an AWB boiler indicates: Fault in diverter valve stepper motor. Check wiring. If in order, replace the diverter valve.
Applies to
AWB ThermoMaster, 3HR 24 P, 3HR 28 P, 3HR 28 TP.
Fault code F 15 on other AWB series
The same code does not mean the same thing on every series. Check the rating plate to see which series you have:
- F 15 on ThermoMaster, 3HR 24 035004, 3HR 24T 035014, 3HR 28 035008, 3HR 28T 035018: Stepper motor fault diverter valve Check wiring. If in order, replace the diverter valve.
- F15 on ThermoElegance, HR 35 ST: Fault in diverter valve stepper motor.
Matching parts
AWB parts are available from Instalpunt; shipping to EU countries from €12.95 (€16.95 for more distant countries), usually 3–5 working days.
For fault code F 15, the part involved is usually in the category: motor.
This message does not point directly to one faulty part. These are the parts that most often fit this appliance:
- AWB ignition transformer € 32.67
- AWB fan gasket for e.g. ThermoMaster 3HR 24 A037526.20 € 9.15
- AWB ignition pin gasket set € 60.11
Fix it yourself or call an engineer?
Always consult the manual for your appliance and work safely. If in doubt or if the fault comes back, call in a qualified professional. A question about a part? Write to us at info@instalpunt.nl.
Frequently asked questions
What does AWB boiler fault code F 15 mean?
Fault in diverter valve stepper motor. Check wiring. If in order, replace the diverter valve.
How do I fix fault code F 15 on an AWB boiler?
First check the cause described above. Then restart the appliance using the reset button. If the message comes back, a part usually needs replacing or the fault needs to be repaired by a qualified professional.
Which parts do I need for AWB fault code F 15?
That depends on the exact cause. In the AWB parts overview at Instalpunt you will find the current price and stock for each part.
Can I fix fault code F 15 myself?
You can reset the appliance and check things like the water pressure or settings yourself. Work on gas-carrying parts must be left to a certified gas engineer.
All AWB boiler faults and codes at a glance →