Hi,

Today my Heating did not come one [Happy Xmas :-( ]

If I click the room thermostat up to ensure the heating should kick in and
switch the programmer on for heating - nothing happens. The boiler does not
fire up. The pilot light does stay on, I had to change the thermocouple
about 2 months ago.

If I turn the hot water on then the boiler fires up OK and goes off when the
Water is up to temperature.

I had a look in the Airng cupboard at the wiring board and with a Multimeter
I could see that the Voltage changed ( between 0 and 240VAC) from the Room
Thermostat and from the Programmer when they were switched ON and OFF.

Any idea what is supposed to strike up the boiler for Heating ?

The motorised Valve doesn't move either.

What should I check next ?

The boiler is a Myson 50B

Help

Alfie