Hi All
Im a first time poster who's looking for some help after scratching my head trying to work out what the hell I've done wrong!!
So....Ive installed a new room thermostat - a Siemens Rev100 - and wired it (I believe) correctly - its a 2-wire unit, so red to L and yellow to L1.
Ive also had a new Honeywell ST9400 programmer installed recently and all was fine until the new room thermostat went in....now I cant get EITHER to switch the central heating on. Hot water from the Honeywell is fine, but heating isnt....can someone try and unpick this for me and tell me where Ive gone wrong? It seems as though the room stat has affected the programmers capability of turning on the heating....even if I take the batteries out of the room stat!!
Im a first time poster who's looking for some help after scratching my head trying to work out what the hell I've done wrong!!
So....Ive installed a new room thermostat - a Siemens Rev100 - and wired it (I believe) correctly - its a 2-wire unit, so red to L and yellow to L1.
Ive also had a new Honeywell ST9400 programmer installed recently and all was fine until the new room thermostat went in....now I cant get EITHER to switch the central heating on. Hot water from the Honeywell is fine, but heating isnt....can someone try and unpick this for me and tell me where Ive gone wrong? It seems as though the room stat has affected the programmers capability of turning on the heating....even if I take the batteries out of the room stat!!