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Are you thinking of the 3.5 and 4.5 highflow Doc? Definitely gone to boiler heaven.

Don't forget. If you're lucky there is a mesh filter in the top manifold, cleaning it can save the day. underneath the brass plug. (on the 400 there is temp Phial inserted in there)

Not sure if they take the 400 on a fixed price. The electronic version yes.

A bit quiet in here isn't it?

Hi all Above washing machine went into fault last week. Unable to open filter. Changed pump and filter housing (Old one was full of coins). Thought was ok but machine not going to full spin, even with no load. Any ideas? I'm ok using a multimeter etc I'm a boiler engineer for a major...

Worst boiler Worcester ever made. The heat exchangers all leak after a period of time. I used to be a WB engineer and replaced loads of them. Phone up WB and get it fixed by them on a fixed price. I always changed the PCB at the same time.

:oops: :oops: :oops:Hands up poor diagnosis! Your right...I should stay away from forums when I'm ****ed! More likely venturi...but hey what do I know.

I'm sorry, but the fan can carry on running if on some boilers the APS is stuck in the closed position.

Probably Air pressure switch.

My money is on a new heat exchanger. Changed loads when I worked for Worcester.

Had this phenomonon a few times. Have you checked the flue? No shrubs/trees covering it outside? Flue put together properly?

You mean 3 port? Probably the synchron motor gone. The early ones motored over for HW.

If it's the plastic type of diverter head. Twist and take off. (you will have to loosen off the control box to do this) You will see the top of the diverter cartridge. My bet is that it's stuck about half way. Pull it and it should pop in to the HW position (at rest). It's best to drain the...

Thanks Rob, I'll give that a look over on Monday

Got called to one of these on friday not working and blowing fuses. Found that AAV was leaking all over the board, also diaphram on last legs. Dried out board, changed AAV and diaphram. Tested and was Ok in CH mode but was not modulating high in HW therefore HW temp crap. Removed board and was...

I'm an ex WB engineer. Changed about 30 of these heat exchangers while I worked for them. They all were leaking from the side of the heat exchanger where the manifold plates are bolted on. My advise is call them out. The most you will be charged is about 250.00. I used to change the Heat ex...

It will be a blocked low pressure switch and it'll be a 350 I bet.

Where abouts in Glos are you?