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thanks Kev, i'll look into the 3 way valve tomurrow and let you know what i find. ,, talk with u soon

potterton profile

Ahhh,, now you can see my problem. The orange wire is switched to the pump and the boiler. Earth & neutral both meet from pump & boiler, yet the pump runs, indicating the 3 way valve has operated, but the boiler wont fire up? Why can't it ever be easy?

ok, so the orange wire is switched from the hot water cylinder stat. Which wires then become live for the pump & boiler?

the three way valve,, getting a drink now, this is getting interesting.

would it make sense to check the wiring from the valve? I have five wires. I would imagine that i should get a live to the pump, one to the boiler. Would the others be an earth and then one more to operate the valve motor, that leaves one more??? Gosh this aint easy is it!!

ohh hang on, it would need the pump for central heating so,,, answered my own question..... Sorry

Thanks Kev, its cooling down here again tonight so when the heating kicks in i'll get hot water. But i will post my findings after ive removed the cover. Still cant get my head around why the pump runs but boiler wont fire? Are they using seperate switches in the valve? Sorry for all the...

thank you for your fast response. Will i be able to operate/adjust the switch, or would it be another replacement valve assembly. Thanks again.

so, possibly a faulty valve? Could i take the cover off the valve and see the micro switch?

Hi all, hope you can help. My central heating is working fine, but i have no hot water unless the radiators are being used. I have operated the hot water cylinder stat, turned to max and the pump starts to run but the boiler wont fire? Im not sure how to check the wiring. The 3 way valve...