70
FAULT CODE
Chaffoteaux
Antifrost Mode — Burner Running (LED code)
Medium Severity
DIY Check Possible
The boiler is in frost protection mode with the burner firing.
Step-by-Step Fix Guide
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Step 1
Normal in very cold weather
Gas Safe Reminder
Work on gas appliances must be carried out by a Gas Safe registered engineer. The steps above cover safe checks a homeowner can perform - any internal component replacement requires a qualified professional. If in doubt, always call an engineer.