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Mend Siemens RDJ10RF Thermostat Temp 20

siemens rdj10RF thermostat troubleshooting?

I have programmed th ethermostat to comfort temp 20 degrees and setback temp 10 degrees but the heating did not swich on when timed to do so and the room temp was 18 degrees so i presumed it should have worked! where should the slider at the bottom and on the left be positioned? i had it set on Auto at the bottom and run on the left? Any help would be good. Thanks

Michelle
February 2010
SiemensSiemens RDJ10RFHeating, Home Heating SystemsThermostat Temp 20
The clock on the room handset is not connecting to the box the batteries have been replaced and the connection has been made as the green light is on and the sun/moon button will turn the boiler on and off just not the timer?

Roma
April 2015
there is 'err' showing on the thermostat and the heating is not working

andrew mcmullen
November 2011

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