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    Dual-element immersion heater

    Here is one http://www.ebay.co.uk/sch/i.html?_nkw=dual+element+immersion+heater
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    New Install back to wall pan and wc back to wall unit

    I am not happy with a gap at the top, filled or not, I have paid good money to get this done properly, please can you alter the front angle of the cabinet to make every LOOK square. Then I will have no hesitation in recommending you to my friends.
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    ultracom sxi f9 fault.

    That makes sense gaz, Also the pressure is quite high so a small increase may not show so easily. And if pressure is dropped that may help a bit?
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    New Install back to wall pan and wc back to wall unit

    So the floor and wall are out of square. In which case, "Excuse me sir, would you like a small gap filled at the back with a 3 mill gap on the floor? Or no gap on the floor and a bigger gap filled at the back?" The prob seems to be that the cabinet should have been squared to the floor.
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    Worried about my plumbers competence

    If you get a gas safe inspector out they will not charge you anything. They will endeavour to put your mind at rest whether you are right or wrong.
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    Installing and Wiring a Potterton PTT2 Cylinder Thermostat

    Not many people set a bimetal stat at 45-50C it is usually 55-60C Bugs get bred if too low.
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    New Install back to wall pan and wc back to wall unit

    If it is a consistent gap then why not make it less than 5mm and have a small bead of silicon instead of a thick bead of it? That would be my question.
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    Combi boiler not heating water or radiators!

    My sentiments exactly ian. Hope she finds the filling loop.
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    ultracom sxi f9 fault.

    Why is pressure so high? it should be about 1 bar when cold, and 2.5bar is too near 3 when it will eject out water to drop pressure. Get pressure down first and see if it make any difference, if too much increase from cold to hot in pressure may need another expansion vessel added.
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    Combi boiler not heating water or radiators!

    If you find the pressure low as ian said then you need to find the filling loop, open 1 of the valves and then while watching the gauge open the other valve and you will hear water going into the system, as soon as the gauge gets to 1bar turn the valve of and then the other one. If you start...
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    cold shower

    If you have checked that there are no restriction in the hot water flow to the shower,then it may need a replacement cartridge,You have to make sure which type, low or high pressure, if you have a tank in the loft and no pump for shower then its a low pressure, if it's a sealed system combi or...
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    Boiler mfrs wireless roomstat?

    Any wireless room stat will do.
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    Condensate boiler drain....illegal?

    Is the water coming from a plastic 22mm overflow pipe or a 15mm copper pipe? If plastic then it MUST exit to a plastic covered drain or tee into a plastic waste, or into a purpose built soakaway, no other choices are acceptable. if condensate it cause I white stain to appear and the installer...
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    Sealed system pressure loss

    If no leaks and if it was sealed JUST to test it then no PRV to leak so stop worrying.
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    Gravity fed water preasure

    I mistyped, it should have read a 1/2 not a 1/5
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    Sealed system pressure loss

    If it lost 5psi that is a 1/3bar and over a week on 3 bar that isn't a lot to see. I could be inside the coil and not visible.
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    Gravity fed water preasure

    denso is near enough spot on 1/5 your wish pressure and that's what you have.
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    Worcester 28i Junior Water Pressure Switch

    Temperature sensor (8000-20,000Ω). Should be. Low voltage wiring harness / connections to sensor. Check Fan / fan harness / connections to fan.Check Or PCB I don't think there is a low water pressure switch I can't find one in the manual. Unless gas safe reg you need someone to check...
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    boiler trips fuse and water alternates between hot and cold?

    It is assumed you have a combination boiler, the secondary heat exchanger is suffering from a build up of sludge on the primary flow side, the boiler can't transfer the heat across to the cold water to heat it into hot water fast enough. So the boiler thermostat switches the boiler off and then...
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