Ariston E Combi 38 fires up to heat radiators, but switches self off after about a min, then refires up after 5-10 mins. This goes on repeatedly whilst the central heating is turned on. Currently temperature here is minus 5 and we are all freezing! have flushed system and bled radiators. Correct pressure (1.5mb). Pump vibrating. Any ideas? we are desperate. Many thanks.

Lynne, February 2012

are you sure the pump is pumping.Usually no noise to speak of

A1, February 2012