when heating is on system is heating up very quickly and thermo sensor is shutting system down (rightly so). water is working fine - why may the heating side of the system be getting extremely hot and shutting down before the house gets heated through, how can i remedy this problem.

Gary, December 2008

water from boiler not getting around system
therefore heating up boiler not rads.
check pump, diverter valve operation
then rest of circuit

jegs, December 2008

Perhaps rads are undersized to suit temperature requirements

a, December 2008