Following on from the previous question, the rads are not on at all... have looked for frost thermostat at site of boiler, have removed front casing - but nothing obvious. Could it be inside the house somewhere? Can't even get help from technical manual produced by Trianco... where would this thermostat be, if there is one? and if it is broken, would that explain the phantom water heating? without the boiler running.

Sharon, May 2009

how do you turn the boiler on have just.moved into a new house

Aneeka, December 2011

Hi Sharon
The frost thermostat (if there is one) will be mounted on the wall somewhere.....we usually keep these turned low at about 5 degrees, and they do overrule all of the other thermostats, including the main house one that is usually found in the hall. However, your boiler will have control thermostats internally too, and if they have got the huff then they will have a mind of their own. A boiler thermostat is recognised by its thin copper tube connection (looks like a 2mm thick piece of copper wire). One type has a copper bulb on the end and is usually inserted into the top of the boiler casing somewhere, the other type looks like an aluminium disc about 25mm diameter by 10mm thick and usually lives in the control panel area somewhere. Either could have packed in, to give the problems you mention. Hope I haven't confused things even more!!

John, May 2009