Honeywell ST9100A 24hr Single Channel Programmer is a single channel timer, designed primarily for control of a single heating zone or combi boiler application. It is suitable for mains, low voltage, or potential-free switching of the heating load. I thought the service was excellent and had no problems, would definitely use you again and recommend. It was unfortunate that the first delivery of my item was lost in transit but full marks to myTub as they kept in helpful communication with me and sent a replacement item shortly after me reporting the non-delivery. I thoroughly recommend this company for their efficient and friendly service. The Honeywell ST9100A model is a 1 day timer with two on/off switchings times per day (which can be increased to 3). The Honeywell ST9100A Programmer can be used for combi boilers, heating zones or any application where small electric loads need switching. The upstairs radiators have not been warming up very well for some time, i have tried balancing/bleeding but no remedy.

e The search function were more Google like – if you put Bavia, Bravia or similar into the search no suggestions are forthcoming.HONEYWELL ST9100A TIMER 24HR 1 CHANNEL ST9100A is a single channel timer, designed primarily for control of a single heating zone or combi boiler application. It is suitable for mains, low voltage, or potential-free switching of the heating load. This model is a 1 day timer with two on/off switchings times per day (which can be increased to 3). It can be used for combi boilers, heating zones or any application where small electric loads need switching. All ST9100 models incorporate the Line of Text (LoT) display that gives clear plain English instructions whenever any button or slider is used. This means that installers, customers and users can operate all of the controls reliably, without needing to find an instruction manual. This model has superceded the ST6100A.

Honeywell ST9100A is a single channel timer, designed specifically to control of a single heating zone or application. It is suitable for mains, low voltage, or potential-free switching of the heating load.All were fitted new 3 years ago with a new temperature dial, and for the last few months the heating side of things have not been working as it should.

I have been leaving the programmer on and switching heating on on/off by turning the temp dial on the thermostat. No problems at all, delivery information was well communicated and item actaully arrived safe and sound ahead of forecasted date. All Honeywell ST9100 models incorporate the Line of Text (LoT™) display that gives clear plain English instructions whenever any button or slider is used. This means that installers, customers and users can operate all of the controls reliably, without needing to find an instruction manual. Honeywell ST9100A 1 Day Single Channel Programmer Features: The Honeywell ST9100A 24hr Single Channel Programmer is a 1 day timer with two on/off switchings times per day (which can be increased to 3). The Honeywell ST9100A 24hr Single Channel Programmer can be used for combi boilers, heating zones or any application where small electric loads need switching. All Honeywell ST9100 models incorporate the Line of Text (LoT™) display that gives clear plain English instructions whenever any button or slider is used. This means that installers, customers and users can operate all of the controls reliably, without needing to find an instruction manual.The only time the programmer goes blank screen is when attempting to fire up heating, hot water works fine.