The boiler is a Vaillant Ecotec plus 824. 3 years old and recently serviced. It’s in an S-plan system. Controlled by a controller for the HW and a nest 2nd gen for the heat. Kitchen tap and downstairs loo tap runs from the Combi and the rest of the house pumped from the tap.
I’ve noticed over the last few weeks that the boiler only recognizes call for heat from the nest sometimes. Hot water is fine. Toggling the nest up and down sometimes solves it (radiator symbol on boiler then flame) sometimes not.
Thought it may be the nest so have changed it for a hive. I’m a beekeeper so it fits I took the opportunity to rewire the wiring center as it was done a bit shoddily by whoever installed it. All fine for a few hours then same problem.
I’m guessing now that the valve to the heating is knackered. Is this likely? Unfortunately I haven’t got a clue where it is. The cable to it just disappears into the wall. Can’t find where it is. I’m presuming it is the cable from the valve as it has 5 wires (L,N and E) and was wired in as a valve.
I know I can’t open the boiler front because I can’t check the seal when closing and I know you can’t advise me on the internal wiring and connections because of this.
Is there anything else I can check? Is there anywhere that the lost valve is likely to be so I can check it?
With thanks and happy Xmas.
I’ve noticed over the last few weeks that the boiler only recognizes call for heat from the nest sometimes. Hot water is fine. Toggling the nest up and down sometimes solves it (radiator symbol on boiler then flame) sometimes not.
Thought it may be the nest so have changed it for a hive. I’m a beekeeper so it fits I took the opportunity to rewire the wiring center as it was done a bit shoddily by whoever installed it. All fine for a few hours then same problem.
I’m guessing now that the valve to the heating is knackered. Is this likely? Unfortunately I haven’t got a clue where it is. The cable to it just disappears into the wall. Can’t find where it is. I’m presuming it is the cable from the valve as it has 5 wires (L,N and E) and was wired in as a valve.
I know I can’t open the boiler front because I can’t check the seal when closing and I know you can’t advise me on the internal wiring and connections because of this.
Is there anything else I can check? Is there anywhere that the lost valve is likely to be so I can check it?
With thanks and happy Xmas.