E1-64 High

Daikin E1-64 Fault Code

Also written as E164 — same fault.

The Daikin E1-64 fault code means: your boiler has sensed a flame inside the system before it was even supposed to start up, causing it to shut down for safety.. It appears on 1 Daikin model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Flame detected before burner operation – try resetting the boiler

What causes the Daikin E1-64 fault?

This fault occurs when the boiler's internal sensors detect a flame prematurely, which is a significant safety risk. The most common reason is a faulty gas valve that is leaking fuel into the burner tray or an electrical glitch in the main control board that incorrectly 'sees' a flame that isn't actually there.

Typical repair cost £120-350 (including labour)

DIY fix possible

Locate the reset button on your boiler's control panelPress and hold the reset button for five secondsWait for the boiler to restart and check if the error reappears

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Daikin models that show the E1-64 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Daikin E1-64 fault code information on this page is sourced and cross-checked against the official Daikin service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026