The HE is fitted with a Grundfoss Twin Head Pump, One Head provides Hot Water circulation thought the thermal store, the other Central Heating, The Hotwater Pump may not be working, or if it is there are plastic non-return valves in each of the pump outlets, the Heating one may be letting by, which is cauling reverse circulation and overheating of the primary boiler,
www.elanar.co.uk
March 2010
howtomendit.com for free repair help, information and advice.
