532/i Boiler problem - no heating!?

Hello,

We've just moved into a new property and had a lovely warm house for a week. Now the heating has completely stopped working.

I turned the boiler off and on again to see if this resets things but no change.

The hot water works fine and the thermostat displays flame icon.

Its as if the thermostat and boiler have lost connection... that the boiler isn't receiving instruction from the thermostat.

Does this make andy sense?

Any ideas what could be going wrong?