Powermax155x issues

digglejones
New Member

Posts: 2

Powermax155x issues Nov 26, 2013 17:25:17 GMT -5

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Post by digglejones on Nov 26, 2013 17:25:17 GMT -5

Hello,

power max owners, I am having problems with a 10 year power max 155x that the heating works fine, but the domestic hot water recently from the taps and our power shower runs hot for a short while and then Luke warm. If you have the shower on the hottest setting it is Luke warm. When I checked the boiler the limit stat needs to be reset, it happens 2-3 times days a day, I have read previous posts where this could be the relay, any ideas mike?
thanks

max
New Member

Posts: 11

Powermax155x issues Dec 19, 2016 12:16:34 GMT -5

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Post by max on Dec 19, 2016 12:16:34 GMT -5

Hi Digglejones,

Appreciate this is a number of years later, but was wondering if you ever got resolution with this issue? I have an issue where the hot water to the taps also slows to the point where it doesn't flow anymore, and am wondering if it is the blender valve causing the problem.

Many Thanks,

Max

Richard King
Guest

Powermax155x issues Mar 12, 2017 15:00:47 GMT -5

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Post by Richard King on Mar 12, 2017 15:00:47 GMT -5

I'm no expert - but I think I'm almost certainly right in thinking the secondary heat exchanger is full of scale. I recently descaled my own, after 11 years of use. It had quite low flow and was just starting to be a problem. I removed it and filled with a product that is sold for cleaning mortar from bricks (sometimes called "brick acid").

I left is bubbling away for about four hours - replacing the fluid a couple of times - and it seems to get the thing clean as a whistle, with greatly improved water flow.

Otherwise, I could have paid a couple of hundred quid for a new HE!. BTW You need to buy new 8 O rings for the HE to ensure no leaks afterwards...

Post by digglejones on Nov 26, 2013 17:25:17 GMT -5

Post by max on Dec 19, 2016 12:16:34 GMT -5

Post by Richard King on Mar 12, 2017 15:00:47 GMT -5

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