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Evening Dean, Thanks for the response. It is a Saunier Duval Thema Classic F24E. Regards

Hello, Love the DIYnot forums. Always plenty of great advice available. The boiler problem! I have a combi boiler with radiators throughout my flat that all get really hot quickly with no cold spots. Unfortunately the boiler cycles (turn off and on) 30 – 60 seconds after initially heating...