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had exact same problem with one of these boilers last week. I tried the venturi first which didnt solve problem , then changed CH thermistor and that cured it. Venturi was quite tricky to remove because access to the boiler was restricted.

sounds very much like the divertor valve could be faulty/stuck

Did u remember to cut off the end of the nozzle? Seen it done many a time.

There is more chance of copper failing a speedfit joint than HEP.

I have to say ive never had any problem with putting Hep into Speedfit and vice versa.

Plumb Center any plumbers merchants. If i remember correctly , BandQ waste fittings are not compatible with the standard waste fittings. I think there is 2mm size difference. This may be where u are having trouble getting them to fit.

If i come across this scenario i use the flat end of my footprints. I put flat end into valve and then turn footprint body with a big spanner. If that doesnt work heat the air valve up with a blow torch first to help loosen it.

Asa rule of thumb that is correct. Its impossible to explain how tight u actually have to do it. Too tight is often as bad as not tight enough. It is one of these things that comes with experience but as u are not having any leaks i think u are doing fine :wink:

You would be better rewnewing the whole air valve assembly. You would either unscrew it with a spanner if it has an external hex , or for an older radiator you would use a radiator spanner (allen key) to spin it out.

If u turn off the cold main ur hot water will be off as well as combi is fed with mains cold water. :) Alternatively , on the cold supply pipe going into the boiler there will be an isolating tap of some sort.

Possible divertor valve problem

sent.....again :lol:

It depends what kind of pattern it had on it :wink: :lol: :lol: :lol:

sent :wink:

Plus the fact that i never told him to take it off.............. :? :roll: :roll:

i can email u Turbomax 282e instructions....i would think its almost the same.

If its cold at the top and hot at the bottom it will have air in it. Get an air key and bleed the radiator of air and u should be sorted.

is it aTurbomax?

You can fit a Y-Branch on to the pipe....this will give u the 2 connection su require :)

Is it possible it WAS fitted the weong way around? The Vokera diverter valve diaphragms fit into a groove an the divertor cap.