DIY Doctor

Powermax 155x Boiler No Hot Water When Taps Fully Open

Postby stephent123 » Fri Oct 11, 2013 9:29 pm

I have a powermax 155x boiler (without a guage).

We have a problem at the moment with the hot water supply. We can get hot water with taps open slightly, but as soon as you ask for more water, IE open two hot taps or open up a tap fully, the pump cuts off, which results in no hot water.

If you wait a min or so, then you can get hot water again (only low pressure).

Any ideas?
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