BoilerFaultCodesRemeha E30 Fault Code
The Remeha E30 fault code means: your boiler has detected a fault with the hot water temperature sensor, meaning it cannot accurately tell how hot the water is.. It appears on 2 Remeha models in our database.
Technical description: Short circuit DHW sensor: check wiring and sensor.
What causes the Remeha E30 fault?
This fault occurs when the boiler's control board loses communication with the sensor responsible for monitoring your hot water temperature. The most common reason is that the sensor's internal electrical circuit has failed or the connecting wires have become damaged or loose. Because the boiler can no longer safely tell how hot the water is, it stops heating to prevent overheating.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Remeha models that show the E30 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Remeha E30 fault code information on this page is sourced and cross-checked against the official Remeha service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026