Itho Daalderop fault code A1 1
Fault code A1 1 on an Itho Daalderop heat pump (including WPU 5G) means: Temperature is outside the normal operating range or the sensor has an open circuit or short circuit. Reset the appliance once. If the code comes back, a part is usually faulty, often a temperature sensor. 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 A1 1 on an Itho Daalderop heat pump indicates: Temperature is outside the normal operating range or the sensor has an open circuit or short circuit.
Applies to
Itho Daalderop WPU 5G, 18-C, 18-COE, 18-E, 18-GE, 18-KC, 25-C, 25-COE, 25-E.
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 A1 1, the part involved is usually in the category: sensor.
Based on the cause, these original Itho Daalderop parts fit (always check the type number of your appliance):
- Itho Daalderop sensor cable short € 10.45
- Itho Daalderop sensor cable long € 11.76
- Itho Daalderop sensor 22 mm Tasseron HRT/OLB/WPU/BWP € 16.99
Further reading on this cause
Other Itho Daalderop codes with the same cause
- A1 10 — Temperature is outside the normal operating range or the sensor has an open circuit or…
- A1 11 — Temperature is outside the normal operating range or the sensor has an open circuit or…
- A1 12 — Heating pressure sensor is not functioning properly or is defective.
- A1 15 — Source flow sensor is not functioning properly or is defective.
- A1 2 — Temperature is outside the normal operating range or the sensor has an open circuit or…
- A1 3 — Temperature is outside the normal operating range or the sensor has an open circuit or…
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 heat pump fault code A1 1 mean?
Temperature is outside the normal operating range or the sensor has an open circuit or short circuit.
How do I fix fault code A1 1 on an Itho Daalderop heat pump?
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 A1 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 A1 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 heat pump faults and codes at a glance →