BoilerFaultCodesRavenheat 44E Fault Code
The Ravenheat 44E fault code means: your boiler has detected an unusual temperature difference between the pipes, causing it to shut down to prevent overheating.. It appears on 7 Ravenheat models in our database.
Technical description: Different temperature error
What causes the Ravenheat 44E fault?
This fault occurs when the boiler's internal sensors detect that water isn't moving through the system correctly, leading to a sharp temperature gap between the flow and return pipes. The most common reasons are a failing circulation pump that can't push water around or a blockage in the heat exchanger caused by a buildup of limescale or sludge. In some cases, it may simply be a faulty sensor providing an incorrect temperature reading to the main control board.
This issue often surfaces in autumn when the heating is turned back on after a long summer break, as pump components can seize up from lack of use.
DIY fix possible
Check that the boiler pressure is between 1.0 and 1.5 barEnsure all radiator valves and isolation valves are fully openBleed your radiators to remove any trapped air pocketsReset the boiler using the control knob or button
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Ravenheat models that show the 44E fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ravenheat 44E 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