there is a over heat reset on the sime if presure went low it could have over heated therefore over heat resrt button will require resetting thin I believe is on front right hand side or under boiler ,a little red button
tony....tsp heating
July 2007
Automatic Answer
While you wait for answers, we may have found some information which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.