Itho Daalderop fault code H 1
Fault code H 1 on an Itho Daalderop boiler (including KliMax 1) means: Fault in coupling piece type VKK in the ventilation outlet duct. 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 H 1 on an Itho Daalderop boiler indicates: Fault in coupling piece type VKK in the ventilation outlet duct.
Applies to
Itho Daalderop KliMax 1, HRT 20-22/HRT 20-22 VK, HRT 24-28/HRT 24-28 VKK, HRT 30-36/HRT 30-36 VKK, HRT 36-42, HRT 42-54.
Fault code H 1 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:
- H 1 on KliMax 1, HRT 24-28/HRT 24-28 VKK: Status / temperature display: fault in coupling piece type VKK in the ventilation outlet duct.
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. If the code keeps coming back, view the Itho Daalderop parts:
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 H 1 mean?
Fault in coupling piece type VKK in the ventilation outlet duct.
How do I fix fault code H 1 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 H 1?
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 H 1 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 →