UFH Electrical Fault?

[Carl Tales]

Please can anyone offer advice on what may be causing my boiler and pump not to kick in when my UFH zone is switched on. I have 2 separate manifolds. One works snd the other doesn’t. The one that doesn’t has power snd the actuators switch on and electric valve opens but the pump and boiler light remain off and neither fire up. (Green lights show in the switch panel above manifold to show actuators are powered on)
Could it be my pump is faulty but shouldn’t I still see the boiler light switch on if I had just a faulty pump?

 

[picasso]

More likely the ufh controller is faulty, can you remove the cover and take a pic of the wiring.

 

[Carl Tales]

Here you go..... Thank you

 

[picasso]

If you have a multimeter check you have 240vac on the orange wire coming from the two port valve when the ufh is calling for heat, the valves are the usual weak spot .

 

[Carl Tales]

Thanks. I don’t have multimeter but have just ordered one from Amazon. I’ll check thanks

 

[Carl Tales]

Ah sorry yes the electronic valve is working fine. When I call for heat I hear it open. And closes when I turn thermostat down. I do get hot water through this valve to the manifold when my other manifold is on. It’s just the pump isn’t pumping it round and my flow meters remain up.

 

[picasso]

The valve maybe opening and closing but you need to make sure the end switch in the valve is connecting, its this switch that brings the boiler and pump on hence the need for a multimeter.

 

[Carl Tales]

Thank you. I’ll check the voltage

 

[Carl Tales]

Hi again. I tested the voltage on the orange and it does get 240v when calling for heat. No voltage on the pump terminals.

 

[picasso]

Is the fuse ok on the ufh controller ?

 

[Carl Tales]

The fuse underneath the orange is ok yep.

 

[Carl Tales]

I just tried my system and for the first time I noticed one or could have been both red lights turn on but immediately turned off. Green lights remained on.

 

[picasso]

Then the ufh controller is kaput, probably a relay gone but easier to replace the whole unit,

 

[Carl Tales]

Thank you

 

[Martyn Kyte]

Can I ask if this resolved the problem as I have exactly the same issue