Nefit fault code Knipperende waterdruk
Fault code Knipperende waterdruk on a Nefit boiler (including ProLine) means: The measured central heating water pressure is too low. The output for both central heating and domestic hot water mode is limited. 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 Knipperende waterdruk on a Nefit boiler indicates: The measured central heating water pressure is too low. The output for both central heating and domestic hot water mode is limited.
Fixing fault code Knipperende waterdruk: step by step
- Read the water pressure on the display or gauge. With the system cold it should be between 1.5 and 2 bar.
- If it is lower, top up to 1.5–2 bar with the filling valve or filling loop, then close the valve again.
- Bleed the radiators with a radiator key, then check the pressure again and top up if needed.
- Reset the appliance once. If the code comes straight back, do not keep resetting it.
- Does the pressure drop again within a few days, or does the code come back? Then there is a leak somewhere (radiator, pipe, pressure relief valve or expansion vessel) or the pressure or flow sensor is faulty.
Applies to
Nefit ProLine, HRC 24 CW3, HRC 24 CW4, HRC 30 CW5, NxT HRC 24 CW3, NxT HRC 24 CW4, NxT HRC 30 CW5.
Matching parts
Nefit parts are available from Instalpunt; shipping to EU countries from €12.95 (€16.95 for more distant countries), usually 3–5 working days.
Parts per Nefit-series: ProLine (NxT) · TrendLine (II) · EcomLine · TopLine.
This message does not point directly to one faulty part. These are the parts that most often fit this appliance:
- Nefit automatic air vent € 26.99
- Nefit siphon gasket per 5 pcs for EcomLine and TopLine € 23.87
- Nefit pressure sensor with click connection for TopLine and ProLine etc. € 58.19
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 Nefit boiler fault code Knipperende waterdruk mean?
The measured central heating water pressure is too low. The output for both central heating and domestic hot water mode is limited.
How do I fix fault code Knipperende waterdruk on a Nefit 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 Nefit fault code Knipperende waterdruk?
That depends on the exact cause. In the Nefit parts overview at Instalpunt you will find the current price and stock for each part.
Can I fix fault code Knipperende waterdruk 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 Nefit boiler faults and codes at a glance →