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Absolutely nothing to do with 04 code. This unit activates the boiler when hot tap is run.

Sure is Vokera part no 6872 Part 6867 is the bearer plate that diaphragm sits on and spindle is part no 6888

Immersion heater for UV is behind the plastic cube like cover on the cylinder On the vented cylinder immersion easily seen. Both will have a coil through which heated boiler water flows to heat the cylinder, much faster than the immersion can

Immersion heater is there for that very reason when the boiler plays up. Good idea to fire up the immersion heater every 3-4 months or so to ensure it is functioning. Often see these are waterlogged and split

How are you going to register the boiler and carry out FGA readings as required by the Benchmark logbook. Excuse me if this post seems to be a diy effort.

Circuit resistance is the other way round for HW and CH

Read my earlier post re flow manifold Have come across this issue many times What one needs to appreciate is, hot water heat exchanger is inside the boiler and radiators are connected to the boiler with long runs of pipe. Then visualise water flow though a virtual short circuit as opposed to...

Really! The pump is powered by a relay. The PCB operates the relay and 240 volts applied to the pump. No correct check circuit other than the fuse. First thing that happens on the lenea to a demand, be it ch or hw, the pump runs. Does not tell the PCB anything. That spindle has to do its thing...

The ONLY way to pick a trades person is by 1) recommendation, 2) work carried out has been correct and reliable timewise ( say a year later), 3) Internet commendation means nothing. Have learnt from experience, great Internet commendations, but builder turns out to be a vagabond and scam artist...

Get the user manual out and read it. Programmer does not fire anything, it just gets things moving to result in boiler operation

With that attitude, my expertise to carry out a repair is in the gutter. Post your details so I am not ripped by you since I am a sole trader. What I charge and you accept is way it works. Some will call my charge excessive, others not is the way the system works. Also what makes you think a...

Stormy D said he was a small man, I suppose smaller hands is more appropriate then

We have a kitchen where traditional extraction cannot be installed due to small size of kitchen and other reasons. I am looking for a hob where the extraction can be ducted to the outside via duct that goes behind the base unit, then it would go below the kitchen floor to the outside ( from...

Every cloud has a silver lining. I quite like this boiler.

What is this similar experience Knowing what is involved in replacing this PCB, I am surprised a Gas engineer would suggest you replace the PCB especially the nature of the lockout.

I as a Gas Safe engineer would never say to end user to do this, that or the other

I think north of the border it does. Left CI is rainwater, right,o soil pipe

I thought India too.

Was the gas pipe gas meter to boiler replaced or size of pipe checked that gas delivery is as it should be? If the gas pipe to boiler is undersized, often when the gas hob ( if you have one) is running, observe size of hob flame, then run a hot tap. Hob flame will diminish in size. It is not...

If both showers pipe run have same flow resistance to water flow then boiler hot water flow will be divided equally if both showers were run at same rate if that makes sense