Question about Whirlpool Aquatic Millennium VII - A17MIL7257

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I have combi biler fix in my house, when I m taking shower there is hot water for first few minutes, but the boiler goes off and no more hot water, I have to wait for 5 minut to get hot water again.

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Your coil is plugged, needs to be replaced m,about a 750 dollar job

Posted on Aug 01, 2009

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Posted on Jan 02, 2017

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My central heating turns off when i turn the hot water tap on. when i turn it off the central heating doesn't come back back on until i turn the power off and on.


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My central heating works but I have no hot water - 24'7 ...

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Feb 09, 2016 | Water Water Heaters

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I have a Vaillant Combi boiler, recently serviced by British Gas, given all clear. Problem we are having is the downstairs hot water tap it is a mixer tap, the cold water is fine but the hot water is


Boilers are inherently dangerous for the average DIY for so many reasons, contact British Gas and have them come back and fix it, tell them it was fine before the "service". They may simply have a control valve shut off.

Sep 23, 2014 | Water Heaters

1 Answer

I have a vaillant eco pro 28 combi boiler. no constant hot water unless tap is on really low.


Oh some of these there was a small black heatexchanger just for hot water they some times block up . or it could be a blockage in the water section where it flows in .I know Valliant have a very good tech line and fitters who do house calls .

Mar 02, 2017 | Water Heaters

1 Answer

I have a Potterton Combi Puma 80e When I use the shower the pressure seems to drop and shower goes cold! except when the central heating is on shower works fine


Does the red status led in the centre of the control board come on when hot water is drawn? You need to remove ONLY the front decorative cover to see the control board, two fixing screws at the base of it. If not the boiler won't fire when the CH is off.
The trigger for this is a pressure switch, replacement of which is beyond DIY scope.
FYV

Feb 11, 2013 | Water Heaters

1 Answer

Vaillant ecoMAX 828/2boiler goes on & off when running hot water!


water must be set at 3lts a min ,check diaphragm valve move when hot tap is on, check microswitch ,best of luck

Aug 09, 2009 | Water Heaters

1 Answer

Radiator heats up when running a shower.


Your boiler is overdue for a service.

Combi boilers are unlike regular boilers in that they have quite a few moving parts, it's vital that these are serviced annually if you want the boiler to remain reliable and to avoid expensive failures.

In your case, the diverter valve has most likely failed. Normally, when the heating is on this senses when there's a demand for hot water and temporarily diverts the primary hot water circuit to feed the domestic hot water heat exchanger. When the demand for hot water ceases the primary hot water circuit is diverted back to the central heating heat exchanger. The valve has a number of moving parts including a rubber diaphragm which can wear out and split and moving shafts which can seize.

When the valve fails it can leak and also can divert hot water to the central heating heat exchanger when hot water is used. The reason that only the highest radiators in the system are affected is probably because the failed valve does not necessarily cause the central heating pump to activate and circulate the hot water throughout the system (it does on some boilers though). If hot water is introduced into a cold heating system it will rise via convection to the highest points in the system like an old fashioned gravity circulation system which was unpumped.

Call a heating engineer out as soon as possible; I'm not going to advise how to do the repair yourself as gas appliances MUST be serviced by qualified persons only for reasons of safety. If you're lucky then the valve simply needs cleaning up and a few new diaphragms plus other minor seals and rings. If it's gone too far then the valve and possibly the manifold it's attached to will need to be replaced.

In the UK the part alone typically costs between £100 to £200 depending on whether it's just the valve or the manifold as well. The diaphragm kit typically costs up to around £15 and is routinely fitted when the boiler is annually serviced, and a new valve will already have new diaphragms fitted. For a routine service expect to pay for up to two hours labour (many can be done in one hour), but if the valve/manifold have failed it will be longer as one failure often causes other parts to need further inspection/repair.

I hope that I've helped you today, if so please return the favour by rating my answer.

Jul 10, 2009 | Whirlpool Aquatic Millennium VII -...

1 Answer

Hot water


there are two main faults with combi boilers not giving hot water. one is a faulty flow sensor, the other is the most common which is a blocked heat exchanger caused by debris and scale in the system. this needs to be flushed out or may require a new heat exchanger depending on the age and condition of the boiler some plumbers may suggest a new boiler.

Mar 02, 2009 | Water Heaters

2 Answers

Combi Boiler - Hot water pressure low


the coil inside got clogged

Dec 22, 2008 | Water Heaters

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