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We have 174 questions about mending 'turn main switch'
Main Combo Eco Boiler Error Code E133?
Why does my boiler keep switching on and off?
Fault on fan or flue?
How can my boiler be fixed i main Medway 55/54 ?
how to regulate gas?
How can I fix my Main Combi 30HE boiler?
Can I get the instructions to add more water to boiler pressure is just bel?
How can I reduce the pressure on my boiler?
can I fit this myself or do I need to be gas safe engineer?