rE72 High

Warmhaus rE72 Fault Code

Also written as RE72 — same fault.

The Warmhaus rE72 fault code means: your boiler is failing to light the flame, which means you will not have any heating or hot water until it is reset or repaired.. It appears on 1 Warmhaus 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: Delta T error – boiler failing to ignite. Could be due to a gas line valve being closed or a flue error.

What causes the Warmhaus rE72 fault?

This fault occurs when the boiler tries to start but cannot successfully light a stable flame. The most common reason is a disruption in the gas supply, such as a closed internal valve or an issue with the ignition components failing to create a spark.

This fault can sometimes occur during very windy weather, as high gusts can occasionally interfere with the air pressure required for the boiler to ignite safely.

Typical repair cost £100-280 (including labour)

DIY fix possible

Check that your gas emergency control valve and any internal gas lever valves are fully openInspect the flue terminal outside to ensure it is not blocked by leaves or debrisPress and hold the 'Reset' button for 3 seconds to attempt a restart

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Warmhaus models that show the rE72 fault code

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

Source

Warmhaus rE72 fault code information on this page is sourced and cross-checked against the official Warmhaus service / installation manuals for each affected model.

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