Knowing who the building contractors are, I would tend to agree.
Radiators not heating
- Thread starter iShaun
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- heating no heating zone valves
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Deleted member 267285
Possibly Tower. One thing I would check is inside, I’ve had some Drayton valves recently on new builds “fail” after 12 months, turns out it’s just 2 loose screws holding the innards together.
putting both valves into the manual setting will not bring the boiler on, that lever is for filling the system when first installed
But it did to start with?
no it didnt one of the va;ves was working the other wasnt, the way these valves work is the motor when powered opens the valve to the man position then a tiny bit further and makes a micro switch , this switch brings the boiler on, when you manually move the lever to man the mechanism doesnt move far enough to bring the boiler on.
If you set one valve to man the valve will open, then when the working valve comes on the switch from the working valve will bring the boiler on and both zones will heat, but with both set to man no signal is sent to the boiler to fire
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Deleted member 267285
Some valves briefly make the microswitch inside if you do lever it far enough, Drayton valves do this, but as a @ianmcd has said it’s not manually firing the boiler up.
That makes sense. Thanks