Maxi Bahama 100 combi?

Without seeing it mate its hard to say. You can clean out the fliow switch its a simple job. Look for the mains water into the boiler it will be a 15mm pipe with an isolation valve on it (If you look at the scratching on the backplate to ensure its the hot tap inlet pipe). Turn it off and open a hot tap that is below the boiler. (make sure the water stops or nothing comes out.) Once you have done this follow the pipe to a black circular shaped plug with two wires coming off it. slowly unscrew this abit of water will come out but most should come out of the tap if you leave it open. Once you have unscrewed this you see the swith has a little paddle inside. Give this a clean over with some kitchen roll clean up inside the pop it back in. Turn the water back on and give it ago. Good luck

G man
April 2008