Our Potterton Puma has been messing about over the past ew days. The heating simply will not come on either on timer or constant. The hot water fires up ok though and the pressure is fine. My dad took the cover off to have a look and when he accidentally knocked the lid against the boiler it started working for a while. It's not working now though. HELP!

TFC, April 2005

there is a valve to switch over from hot water to central heating this could be sticking

aa, April 2005

it sounds like a loose connection somewhere check all the connectors

aa, April 2005