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system overheating and will not drain

Postby eddiec46 » Sun Jul 08, 2007 11:20 am

Please help,
I have a potterton netaheat system and it has just started to overheat and puts hot water and steam into the expansion tank in the loft. I tried to drain the system to see if there was a blockage but the expansion tank will not drain down. Any ideas on locating the blockage without chopping the pipes to pieces.

regards ed
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Simply Build It

Postby johnb » Fri Jul 13, 2007 2:21 pm

hi edd this is dangerous the pipe from the small roof tank is almost certainly blocked between tank and next tee piece basically cut out and fix all best john
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