602 error code
Chaffoteaux INOA NOx wall-hung gas boiler 602 error code – VMC flue-safety sensor fault
What does Chaffoteaux INOA NOx wall-hung gas boiler 602 mean?
Chaffoteaux documents 602 for the INOA NOx wall-hung gas boiler as: VMC flue-safety sensor fault.
The code identifies the condition detected by the product; it does not always identify the failed component on its own. Confirm the full code and exact model before ordering parts or attempting a reset.
The Chaffoteaux INOA NOx wall-hung gas boiler 602 error code indicates chaffoteaux documents 602 for the INOA NOx wall-hung gas boiler as: VMC flue-safety sensor fault. This guide explains what the code means, the symptoms and likely causes, the checks that are safe to make, and when to stop and arrange an authorised repair.
Symptoms you may notice
The boiler displays 602 and may stop firing, enter a safety shutdown or restrict normal heating and hot-water operation.
Common causes
The official fault table associates 602 with vmc flue-safety sensor fault. The exact component or operating condition must be confirmed on the appliance.
Before you start troubleshooting
Use the display, rating label or product menu to confirm the exact model. Similar-looking codes can have different meanings across product generations and regions.
- Record the complete code before switching the equipment off.
- Check only user-accessible controls, filters and external connections described in the manual.
- Do not open gas, refrigerant, combustion or electrical compartments.
Troubleshooting steps
Record 602 and the exact model. Check only visible pressure, power, controls and external conditions allowed by the user instructions. Do not remove the casing or test internal components.
Can you fix this error code yourself?
The safest next step depends on the exact model and the cause behind the code. External checks may help, but a returning fault needs professional diagnosis.
A successful reset is not proof that the underlying issue is fixed. If 602 reappears, note when it happens and give that information to the service engineer.
Reset instructions
Reset only where the official instructions permit it. If 602 remains or returns, stop resetting and arrange qualified diagnosis.
Applicable products and models
INOA NOx wall-hung gas boilerINOA NOx 25 CF; 25 SHUNT CF; 24 VMCTechnical manual 420000471400, 2018When to contact a professional
Contact Chaffoteaux support or a suitably qualified heating engineer when 602 persists, returns after a permitted reset, or requires internal testing.
Frequently asked questions
What does Chaffoteaux INOA NOx wall-hung gas boiler 602 mean?
Chaffoteaux documents 602 for the INOA NOx wall-hung gas boiler as: VMC flue-safety sensor fault.
Can I fix Chaffoteaux INOA NOx wall-hung gas boiler 602 myself?
Some external checks may be suitable for the user, but the result depends on the exact model and cause. Use the official manual and arrange service if the code returns.
Should I reset the product after code 602?
Reset only where the official instructions permit it. If 602 remains or returns, stop resetting and arrange qualified diagnosis.
When should I arrange a repair?
Contact Chaffoteaux support or a suitably qualified heating engineer when 602 persists, returns after a permitted reset, or requires internal testing.