Nefit fault code re 604
Fault code re 604 on a Nefit boiler (including TrendLine) means: The boiler is being reset. 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 re 604 on a Nefit boiler indicates: The boiler is being reset.
Applies to
Nefit TrendLine, HRC25 CW4.
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 siphon sealing ring for TrendLine (e.g. TrendLine HRC25 CW4) 8718600750 € 10.45
- Nefit siphon sealing ring for TrendLine (e.g. TrendLine HRC25 CW4) 8718600749 € 10.45
- Nefit compensation hose gas control valve € 13.07
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 re 604 mean?
The boiler is being reset.
How do I fix fault code re 604 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 re 604?
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 re 604 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 →