"IMM" wrote in message
...

"Sparks" wrote in message
.. .
Problem:-
The boiler will fire continously while the house is
warming up from cold in the morning but for a short
period just before the room stat is satisfied the
boiler will short cycle, Fire for 2 mins off for about
the same duration. This will happen until the room
stat switches the boiler off.

Could the boiler stat be set too low?

Good point. the stat should always be near to or at the top of the range.


Does this apply to (back boiler) gravity fed systems too?