Recent content by Orothon

If you mean Y system then yes.

Is there any way to diagnose this easily? And out of interest, how does the room unit know there is a fault in the actuator when the only connection between the room unit and the base unit is the mains supply?

Hi, I've a Honeywell smartfit 2 channel 24 hour programme controller which has started showing an F3 error code yesterday and we now have no heating or hot water. Can anyone shed any light on what this code means as internet searches reveal nothing. We've had someone out to look who's...