Itho Daalderop fault code E15
Fault code E15 on an Itho Daalderop boiler (including Base Cube) means: No hot water flow. There is insufficient flow when hot water is demanded. 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 E15 on an Itho Daalderop boiler indicates: No hot water flow. There is insufficient flow when hot water is demanded.
Fixing fault code E15: step by step
- Read the water pressure on the display or gauge. With the system cold it should be between 1.5 and 2 bar.
- If it is lower, top up to 1.5–2 bar with the filling valve or filling loop, then close the valve again.
- Bleed the radiators with a radiator key, then check the pressure again and top up if needed.
- Reset the appliance once. If the code comes straight back, do not keep resetting it.
- Does the pressure drop again within a few days, or does the code come back? Then there is a leak somewhere (radiator, pipe, pressure relief valve or expansion vessel) or the pressure or flow sensor is faulty.
Applies to
Itho Daalderop Base Cube, 24/30 (13L) cw 4, 24/35 (16L) cw 5, 30/35 (16L) cw 5, Duo, After 2016, Tot 2016.
Fault code E15 on other Itho Daalderop series
The same code does not mean the same thing on every series. Check the rating plate to see which series you have:
- E15 on Comfort Classic, 24/50+, 24/80+, 30/50+, 32/80+, 38/80+: Insufficient flow when hot water is demanded.
Matching parts
Itho Daalderop 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:
Itho Daalderop service set gasket mixing chamber € 26.51
Itho Daalderop sight glass for burner unit € 32.62
Itho Daalderop service set test cap 5 pcs flue pipe sealing cap € 35.34
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 Itho Daalderop boiler fault code E15 mean?
No hot water flow. There is insufficient flow when hot water is demanded.
How do I fix fault code E15 on an Itho Daalderop 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 Itho Daalderop fault code E15?
That depends on the exact cause. In the Itho Daalderop parts overview at Instalpunt you will find the current price and stock for each part.
Can I fix fault code E15 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 Itho Daalderop boiler faults and codes at a glance →