From what you write, I understand that you have to fill the boiler up with water once a week, (why) if you have a small leak some where, and the presser gos down the low water switch will cut the boiler off, You re fill the boiler and re set (yes??) If this is what is happening you need to find the leaking water (where!)The cheapest way is to put in leak sealant in a rad, Please let me know how you get on David
capitalboilers.co.uk, June 2009