biasi 24s various intermitent faults

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9 Jan 2010
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i have an 8 year old biasi which up till now has been fairly reliable but now getting various faults - boiler firing up on c/h then running until it overheats and cuts out sometimes not cutting out untill after very hot water is expelled - pump running but won,t fire up till i run (very slightly) hot water - boiler firing up but then firing on and off before temp rises much have checked diaphragms ,pump,changed thermisters any ideas ?
 
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It sounds as if you have a lot of dirt in the system as well as a temperature control fault on CH.

I think its more than 8 years old!

Tony
 
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might be 8-10 years -my mate is council plumber-he services it every year - system has inhibitor in it and anything i let out is reasonably clean -temp guage not worked for over a year but hasn,t affected system before -
 

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