EA 261
FAULT CODE
Worcester Bosch
Heat Control Module (HCM) Potentially Defective
Medium Severity
DIY Check Possible
On Greenstar i boilers, EA 261 indicates the Heat Control Module (HCM) may be defective. The boiler suggests resetting as the first step.
Step-by-Step Fix Guide
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Step 1
Press the reset button and wait for the boiler to attempt restart
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Step 2
If EA 261 returns after resetting, the HCM module needs professional inspection — call a Gas Safe engineer
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.