BoilerFaultCodesRavenheat E44 Fault Code
The Ravenheat E44 fault code means: your boiler has detected an unusual temperature difference between internal sensors, suggesting a possible circulation issue or a faulty component.. It appears on 9 Ravenheat models in our database.
Technical description: Different temperature error
What causes the Ravenheat E44 fault?
This fault occurs when the boiler's internal sensors detect a drastic temperature difference that shouldn't be there, suggesting the heat isn't being moved away from the burner correctly. The most common reason is a pump failure or a blockage in the pipework preventing water from circulating, though it can also be triggered by a sensor that has started providing inaccurate readings. Because the boiler cannot safely verify the actual water temperature, it shuts down to prevent overheating.
This issue is more common in autumn when heating systems are turned back on after a long summer break, as circulation pumps can seize or sludge can settle during periods of inactivity.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Ravenheat models that show the E44 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ravenheat E44 fault code information on this page is sourced and cross-checked against the official Ravenheat service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026