Programmers
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I am totally new to this forum. But I am hoping that I will surely get an answer to my questions. I just bought the house and it has
Potterton Boiler system
Switchmaster 805 control
![2016 2016](https://i.ebayimg.com/images/g/yj8AAOSwYUdbdDGY/s-l400.jpg)
Acl Switchmaster Sm805 Manual 2017
Boiler system works manually and via thermostat but dialer on the 805 does not rotate automatically. So to start, I had to manually turn the knob on the boiler. Keeping thermostat to 0, I can get hot water. Keeping thermostat to desired temp, turning the knob ON gives hot water and CH. As winter is on its way, I have to fix this issue.I am looking at various forums and it shows the replacement side but I am not sure if my Switchmaster 805 is faulty or wiring is faulty? I am willing to buy new timer if I can confirm that it will work. So couple of questions,
How do I confirm that my Switchmaster 805 works?
What is the function of the Randall box underneath switchmaster 805?
![Acl Acl](https://i.ebayimg.com/thumbs/images/g/tpYAAOSw8xhdJfC8/s-l200.jpg)
Will replacement of compatible Switchmaster work in this condition?
Can someone recommend replacement for this please? (So far I found Channelplus H21XL)
Acl Switchmaster Sm805 Manual Diagram
I would be grateful if someone can advise.Thanks