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Rank 2
December 8, 2024
Solved

Heating won’t go off after smart meter install

  • December 8, 2024
  • 13 replies
  • 684 views

we have gas central heating controlled by standard thermostats with heating timers. since our smart meters were installed on friday our heating will not go off, its ignoring the timers and thermostats, its costing a fortune. any help gratefully received.

Best answer by Rastup

Updated on 10/12/25 by Abby_OVO

 

Yes sorry I did, I asked our boiler engineer to come out and he knew what it was immediately, the control for the valve for the upstairs heating had got stuck open. It needed replaced, a common fault and purely coincidental it had failed exactly when the meters were installed. Thanks for all attempts to help.

13 replies

BPLightlog
Super User
Super User
December 8, 2024

Hi ​@Rastup - you mention thermostats and timers (plural)? Can you post photos of these and your meter wiring (no personal details as this is a public forum).

I guess you don’t have a before photo of your previous meter?

Bring me Sunshine ~ E&E {Solar PV, Battery Storage, Hybrid EV, ASHP and Home Assistant automation}
RastupAuthor
Rank 2
December 8, 2024

Hi ​@BPLightlog thank you, im just checking im not being really daft and will put new batteries in my thermostat, just in case its that. will let you know. thanks again

BPLightlog
Super User
Super User
December 8, 2024

Hi ​@BPLightlog thank you, im just checking im not being really daft and will put new batteries in my thermostat, just in case its that. will let you know. thanks again

Check your boiler as well, just in case that started back up in a different mode. 

Bring me Sunshine ~ E&E {Solar PV, Battery Storage, Hybrid EV, ASHP and Home Assistant automation}
Super User
December 8, 2024

Pictures of your thermostat and timer would be useful. Some digital timers have battery backup, to keep them running during short power interruptions. An extended loss of power (possible whilst the meter was changed) can cause the timer to lose the time and/or settings.

Annually: Petrol 1315l to 442l, Electricity 3779 kWh to 2465 kWh, Gas 17,853 kWh to 9128 kWh. 20 years of monitoring and tweaking.
RastupAuthor
Rank 2
December 8, 2024

we have upstairs and downstairs controls. downstairs seems ok, but upstairs radiators hot even when heating set ti off at control. weve tried swapping control fronts and changing batteries, weve tried moving the antifrost dial at the boiler as it looked maybe different to normal , if that though i dont understand why it only seems to affect upstairs. thanks ​@BPLightlog 

BPLightlog
Super User
Super User
December 8, 2024

Presuming that your controls are similar upstairs and down, there seems to be a manual override and off control. 

does that not do anything for the upstairs ?

I must admit that I’m confused how the upstairs/downstairs are separated in terms of delivery … are there controls on the radiators to achieve this ?

Bring me Sunshine ~ E&E {Solar PV, Battery Storage, Hybrid EV, ASHP and Home Assistant automation}
Super User
December 8, 2024

Is the Potterton thermostat on the first image the “frost” stat? If so this should be set around 5°C not 20°C. If this is the “frost” stat then it is over-riding the timer/thermostat forcing the boiler on. Why this effects just upstairs I have no idea!

Annually: Petrol 1315l to 442l, Electricity 3779 kWh to 2465 kWh, Gas 17,853 kWh to 9128 kWh. 20 years of monitoring and tweaking.
RastupAuthor
Rank 2
December 8, 2024

hi the manual over ride does not switch heating off, some radiators dont have controls upstairs and down, the rest do. thanks

RastupAuthor
Rank 2
December 8, 2024

@BeePee was at 5, have tried moving around to no avail thanks

Super User
December 8, 2024

I think it should be at 5°C!

Annually: Petrol 1315l to 442l, Electricity 3779 kWh to 2465 kWh, Gas 17,853 kWh to 9128 kWh. 20 years of monitoring and tweaking.