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greenstar 24i. No hot water?

No hot water delivery, the boiler kettles on the main heat exchanger with HW demand. Central heating demand no problems. A brief history, the previous owners had the rad circuits replaced as the pipework was blocked. Upon purchase of property I moved the boiler to the loft without using the appliance. My guess is the small heat exchanger . Upon kettling the boiler stops as normal there is no flashing blue lights and do'es not require resetting
bob, September 2010
Found the answer myself. HW Bypass valve blocked with debri also heat exchanger littered with debri having flushed the boiler out everything ok.

bob, September 2010
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