NIBE alarm code 240
Alarm code 240 on a NIBE heat pump (including F series) means: Sensor error AZ3-BT21: Sensor not connected/defective (discharge). 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 240 on a NIBE heat pump indicates: Sensor error AZ3-BT21: Sensor not connected/defective (discharge).
Applies to
NIBE F series, -.
Matching parts
NIBE parts are available from Instalpunt; shipping to EU countries from €17.95 (€24.95 for more distant countries), usually 3–5 working days.
Based on the cause, these original NIBE parts fit (always check the type number of your appliance):
- Nibe sensor 10K NTC € 46.95
- Nibe high pressure sensor for F2120 € 310.95
- Nibe temperature sensor kit F7XX € 163.95
Further reading on this cause
Other NIBE codes with the same cause
- 1 — Sensor error BT1 (outdoor sensor): Sensor not connected or defective
- 101 — Sensor error BT1 (outdoor sensor): Sensor not connected or defective
- 102 — Sensor error BT2: No sensor value temporarily available
- 103 — Sensor error BT3 (heat pump return): Sensor not connected or defective (return sensor)
- 104 — Sensor error BT4: No sensor value temporarily available
- 106 — Sensor error BT6: No sensor value temporarily available
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 NIBE heat pump alarm code 240 mean?
Sensor error AZ3-BT21: Sensor not connected/defective (discharge).
How do I fix alarm code 240 on a NIBE 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 NIBE alarm code 240?
That depends on the exact cause. In the NIBE parts overview at Instalpunt you will find the current price and stock for each part.
Can I fix fault code 240 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 NIBE heat pump faults and codes at a glance →