alpha cd28c hot water problem

[chrischris]

I am working on a alpha cd28c combi, i recently changed the diverter valve as the tennant had very little hot water and when the hot water tap was running the boiler would stay on telling me its not a blockage in plate heat exchanger and not overheating. it was send the hot water down the heating pipe. I had a look at the diverter valve head and its working fine. Any sloutions? Cheers

Im thinking now if the dv is not pushing the pin all the way home it will send down heating. Has this happenes before?

 

[Alpha man]

Take the dhw heat ex out and check before you change anything else!

 

[Dotty]

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Job 38.11