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Mend Siemens RDJ10RF Heating Working Flashing Red

Heating controller Siemens RDJ10RF not working?

Wall unit has flashing red light, tried to sync the units with the usual reset, learn etc as described, but just keeps the amber light on on the wall unit and the red light at the top of it still flashes..... have tried the 'tapping' idea but that doesn't work either .....help

Desperate of Portsmouth
April 2014
SiemensSiemens RDJ10RFHeating, Home Heating SystemsHeating Working Flashing Red
Tap the receiver unit when the sender unit is calling for heat. If the boiler then fires up it's probably a sticking relay inside the receiver unit.

Brian
January 2015
2 options

replace RDJ10RF unit [like for like]

or bypass siemens controller by linking CH LIVE/SWITCH LIVE on boiler PCB

Q
April 2014

Automatic Answer

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Siemens RDJ10RF Controller: Red Light & Sync Issues