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The diverter valve got nothing to do with pump. opposite sides...the reason is because the pump isnt building enough pressure to push the water up to heat exchanger so excess water is going down the return pipe....

Diverter valve is ok...goes in and out ok dont think its that the issue is possibly pump is knackered as the water getting really hot whilst you touch metal and also the feed pipe to main heat exchanger is luke warm....so therefore its not pumping water up as most water is being held back in the...

Sorry no its not.....its a genuine problem I have with this boiler.

No pressure gauge dosnt fluctuate....just realised when hot tap is open can hear tickling of water going upstairs radiators but flow 22mm rad pipe is cold only return pipe geting hot...going backwards if you know what I mean....

Ignore my post.

Also cant see it being diverter valve.

All radiators upstairs working, its just when you close the hot water which is also working it just dumps the hot water into the return pipe of the central heating pipe...not sure if its the diaphram....also hot water is also spewing out of the vent screw and not small spillage when unscrewed to...

Hi can feel the heat around 100mm below the the central heating return pipe....I agree they are crap boilers.

Hi all Got a problem with this boiler.....the issue apart from the leaks from the secondary heat exchanger and the pcb blowing up...which is now fixed... is when dhw is running the return ch pipe also gets hot as well....can anyone hear explain why this maybe.....can understand if was the...

Have you checked any external thermostat