The so-called SP1 error on Chaffoteaux boilers is not actually a technical fault. Instead, it’s a notification code that often causes confusion among users, who assume it to be an error due to how it’s displayed. In reality, the correct interpretation is 5P1, not SP1. This article clarifies what 5P1 means, why it appears, and what to do about it.
Understanding the Chaffoteaux Boiler Notification System
Just like Ariston boilers, Chaffoteaux models display notification codes that are frequently misread. Since Chaffoteaux is part of the Ariston Thermo Group, their systems share similar logic and interfaces. The confusion arises because the digital display shows a “5” that resembles an “S”, leading many users to interpret the notification as SP1 instead of 5P1.
This article refers specifically to Chaffoteaux boilers with a digital display, not those using temperature indicators (like 30, 40, 50, etc.) to show errors.
Chaffoteaux boilers categorize issues into two types:
- Volatile errors: These reset automatically when the issue resolves.
- Non-volatile errors: These require manual intervention.
The 5P1 (SP1) notification belongs to the non-volatile group, which means the boiler will not restart until a human takes action.
What Does the SP1 (5P1) Error Mean?
The 5P1 notification signals a failed ignition attempt. It is the first of three attempts the boiler makes to ignite. If unsuccessful, the system logs the following sequence:
- 5P1 – First ignition attempt failed
- 5P2 – Second attempt failed
- 5P3 – Third and final attempt failed; ignition sequence stops
These notifications are tied to two actual error codes:
- Error 501 – Flame not detected during ignition
- Error 502 – Flame detected even though the gas valve is closed
Example Scenario
Imagine a situation where the gas supply is cut off or the valve is closed. The boiler attempts to ignite, fails, and shows:
- Error 501, alternating with Err
- 5P1, then 5P2, and finally 5P3
If the system succeeds on the second attempt, it stops at 5P2 and doesn’t proceed to 5P3.
A similar sequence occurs if the system wrongly detects a flame when the gas valve is shut. In that case, Error 502 appears instead of 501.
Why This Error Is Commonly Misunderstood
Many users mistake 5P1 for SP1, assuming it’s a fault rather than a routine notification. This misinterpretation isn’t unique to Chaffoteaux—it also happens with Ariston boilers, and even with other brands where notification codes resemble error codes.
How to Clear the SP1 / 5P1 Notification
- Reset the Boiler:
Press and hold the reset button for a few seconds. If the error clears, it was likely a temporary issue. - Check the Gas Supply:
Ensure the gas valve is open and the supply is active. A closed or faulty valve is the most common cause of ignition failure. - Inspect for Blockages or Air in the Line:
If air has entered the system or there’s a blockage, the boiler won’t ignite. This might require professional purging or maintenance. - Call a Certified Technician:
If the notification persists, contact a qualified technician to check for deeper issues like a defective ignition system or sensor errors.
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Frequently Asked Questions – Chaffoteaux SP1 (5P1) Error
🔧 Is SP1 a real error code?
No. SP1 is actually 5P1, a notification that indicates the first failed ignition attempt. It’s part of a standard sequence, not a true fault.
🔥 Will the boiler fix itself?
Not in this case. Since 5P1 is a non-volatile code, the system won’t restart on its own. It needs to be manually reset.
🛠 What should I check before calling a technician?
- Make sure the gas valve is open
- Try resetting the boiler
- Check for error codes 501 or 502, which provide more context
⚠️ Is this dangerous?
The notification itself isn’t dangerous, but it signals a failure to ignite, which could mean a gas supply issue. If in doubt, turn off the unit and contact a professional.
🔁 Why does it happen often?
It usually happens after a long period of inactivity or when gas pressure is too low, the supply is interrupted, or the ignition system is failing.
Conclusion
The Chaffoteaux boiler SP1 error—or more accurately, 5P1—is part of a notification sequence that indicates ignition failure. While it’s not a malfunction on its own, it requires action to get your boiler back up and running. Understanding what this code means and how it relates to others like 501 and 502 can help avoid unnecessary stress and technician visits.
If you’re unsure, it’s always safest to contact a licensed professional who can diagnose and fix the issue properly.