Itho Daalderop fault code W05
Fault code W05 on an Itho Daalderop boiler (including Comfort Classic) means: Central heating pressure too low 0.5 bar Central heating water pressure too low, as a result of which the output is limited to the lowest output of the appliance. 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 W05 on an Itho Daalderop boiler indicates: Central heating pressure too low 0.5 bar Central heating water pressure too low, as a result of which the output is limited to the lowest output of the appliance. D.
Applies to
Itho Daalderop Comfort Classic, 24/50+, 24/80+, 30/50+, 32/80+, 38/80+.
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 ionisation all types excl. HR gas combi € 66.65
- Itho Daalderop fan gasket € 18.30
- Itho Daalderop thermal protection l105-20c € 24.18
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 W05 mean?
Central heating pressure too low 0.5 bar Central heating water pressure too low, as a result of which the output is limited to the lowest output of the appliance. D.
How do I fix fault code W05 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 W05?
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 W05 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 →