AWB fault code E 26
Fault code E 26 on an AWB boiler (including ThermoSystem) means: Open circuit at the air pressure switch, low water pressure protection or selector switch (terminals 23/24). Is the system working pressure correct? (2 bar). 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 E 26 on an AWB boiler indicates: Open circuit at the air pressure switch, low water pressure protection or selector switch (terminals 23/24). Is the system working pressure correct? (2 bar).
Fixing fault code E 26: step by step
- Check outside that the air intake and flue are clear (leaves, a nest, ice or snow).
- Check that the condensate trap under the appliance is filled and clean; a blocked condensate drain can make the boiler lock out.
- Reset the appliance once. If the code comes straight back, do not keep resetting it.
- If the code comes back, the small hose to the air pressure switch is often dirty or the switch itself is faulty. Have it checked by a qualified heating engineer.
Applies to
AWB ThermoSystem, HRM 80/2.
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.
This message does not point directly to one faulty part. These are the parts that most often fit this appliance:
AWB gasket mounting valve 5 pcs € 26.82
AWB ionisation pin set € 59.28
AWB ignition pin (set) € 67.74
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 E 26 mean?
Open circuit at the air pressure switch, low water pressure protection or selector switch (terminals 23/24). Is the system working pressure correct? (2 bar).
How do I fix fault code E 26 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 E 26?
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 E 26 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 →