Light on programmer CH on/ HW off, thermostat turned up to 30. Tried reset of boiler but nothing.
Is there anything which can cause actuator or valves to fail?
Help please!
3 months ago we had no CH but HW working, so replaced 3 port valve but today we have the same issue again.
Any suggestions would be greatly received on why this would be doing this again or other areas to check as find it odd that 3 port valve would go so quickly again?