Why is my RXPW4 wall controller no longer turning my heaters on/off?

Modified on Wed, 03 Apr 2024 at 02:34 PM

The may be a few reasons why the RXPW4 wall controller is not controlling the attached heaters


  • The heaters themselves may have developed an issue with the thermostatic control boards, although this is less likely if all the heaters in a property have stopped working - You can test this my turning the dial to the Sun (Permanent comfort) position which should allow the units to function as if they were stand alone units


  • If the controller has stopped controlling a towel rail or hot water cylinder, there could be an issue with the RXPWIF which acts as a switch for the cylinder and is controlled directly by the wall controller



  • The controller itself may have developed an internal board fault - As this model is not serviceable and no longer supported, it can not be repaired and there are no other tested or approved alternative controllers. That said, a qualified electrician can disconnect the pilot wires connected to the heaters which will allow them to function as stand alone units. For any towel rails or hot water cylinders connected, again these will need to be disconnected from the pilot ware and a suitable switch/timer control installed.


Applicable models

RXPW4, RXPW4N, PWE4ZC

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