Itho Daalderop fault code 9
Fault code 9 on an Itho Daalderop boiler (including Combifort and CombinAir) means: High-limit thermostat switches off and central heating water temperature is more than 80 oC. 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 9 on an Itho Daalderop boiler indicates: High-limit thermostat switches off and central heating water temperature is more than 80 oC.
Applies to
Itho Daalderop Combifort, CombinAir, Gas Combi, 2.5/24/33, 22/80, 24/50+, 24/80, 24/80+, 30/50+, 32/80, 32/80+.
Click a model for the parts list and exploded view of that appliance.
Fault code 9 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:
- 9 on Base Cube, 24/35 (16L) cw 5, 30/35 (16L) cw 5: Gas valve lockout, or wiring to gas valve faulty.
- 9 on AquaMax DV, HR24 Tapklasse CW 4 black, HR30 CW5 black, HR36 Tapklasse CW 5+ black, HR42 25L black: Gas valve defective.
- 9. on Combifort, CombinAir, Gas Combi, 2.5/24/33, 22/80, 24/50+: Safety fault control unit.
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.
For fault code 9, the part involved is usually in the category: thermostat.
This message does not point directly to one faulty part. These are the parts that most often fit this appliance:
- Itho Daalderop thermal protection l105-20c € 24.18
- Itho Daalderop service set ionisation all types excl. HR gas combi € 66.65
- Itho Daalderop burner gasket for e.g. CombiFort 24/50+ 07.98.83.186S € 21.57
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 9 mean?
High-limit thermostat switches off and central heating water temperature is more than 80 oC.
How do I fix fault code 9 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 9?
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 9 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 →