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a couple of hours labour and mats... £80 as long as there is not another leak on the pipework!!! ;-)

yeah, diaphram or a dicky servo valve

had intermittant faults with the APS also..... they are the worst when its working when your there and the minute you get to the van it packs in!!

the primary thermistors are bad and the PCB's for going on these. was there continuity across the flow switch?? If so was the H/W pump running??

Sounds like the diverter valve is shot! BG or Heateam will do a fixed price repair for you I am sure as Diverter Valves can be costly.

PCB is faulty, very common on these

To replace the PCB you will need to remove the firefront, replace said PCB, carry out saftey inspections and test on the flue, gas pressures and refit fire before carrying out further flue tests and refitting the case, this one is more than I would recommend for a DIY man, British Gas will do...

DHW diaphram or flow sensor is faulty.

Whats wrong that they need to do the work?? You only need one pump on the HW/CH circuit, these come in various sizes and a Grundfos 15/60 should be enough. The expansion vessles can be for 2 different reasons but the megaflow should have an airbubble inside for expansion so it will prob...

you have an air lock, bleed pump and reduce speed if it is up high. are there any bleed points at the hot water cylinder pipework?? Has the system filled properly?? did the rads blead ok??

A zone valve end switch might be sticking on, two little valves with boxes on the top next to the pump.

Also look to see if there is a balancing valve on the hot water cylinder return as this could be pinching all the flow. Further to this a bypass might be fully open allowing flow to shoot round there?

Fully blead of air, rad valves fully open and not restricted??

its the 41 311 56 there must be multiple versions of this boiler with different controls.... This version does not have the pump direct from the boiler, and cannot, it shows it from an external wiring center. Hence as some will not believe does NOT have a facility of pump over run Was...

you must have a wrong set of instructions (perhaps there was an amendum) I phoned worcester tech help to check there was no modification kit available for a pump overrun but there is defo no way to connect a pump to this boiler. So a bypass it will be.

As said NO connection for a pump from the boiler Nicknox! I read the MI's and it said something different to that quote, i'll look again and perhaps quote the cust for a bypass.

This is a conventional boiler on an S-plan sealed system. Its the older style greenstar (not the new cylinder HE style) The boiler works a treat when under normal operation, however, if it is firing when the demand finishes e.g. the DHW is satisfied, the valves shut pump stops and temp (if...

Hold against yourself on the fitting and use some brute force to make sure the fitting is tight. If this fails.... bung the system rather than a full drain down and get some PTFE on the olives!

those things change colour with heat so if its stuck on the boiler then...., get a proper CO detector with an audiable alarm. The chances of CO inside the home from this boiler is remote but so is getting poisoned and it does happen so get it checked ASAP!

When was the last time it was properly serviced?? It sounds like it needs a strip and clean out. Pilot when slightly overgased make a hissing noise but its no big issue, If I were you I would be using NEITHER boiler or fire and get it looked at pronto!!! Also I would be buying a proper...