Hi, you need to be more specific on the boiler I'm afraid...
Is this a Halstead Heating appliance, with the name Sime TRIO Combi... Or is this a SIME LTD appliance, possible models:
Format xxx
Friendly xxx
Murelle
Planet Dewy xx
Planet Super xxx
Super xxx
Ideally you need to state the "Gas Council Number" of the appliance before anyone can help as there are a lot of different boilers out there.... Otherwise; call SIME LTD direct on: 0870 991 1114
ccMods
July 2006