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Nest E thermostat issues

Discussion in 'Home Automation' started by Daniel Gould, 26 May 2021.

  1. Daniel Gould

    Daniel Gould

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    Hi guys, New here.
    I have a nest E thermostat which I've put in replace of a honeywell t6360. I've wired this is before at a previous address with no issues. However this time round no matter what wires I put in what place the heating stays permanently on. The nest thermostat is on the off setting yet the boiler does not cut out.
    Does anyone have any ideas before I melt in the heat? :LOL:
     

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  3. CBW

    CBW

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    Have you tried refitting the Honeywell? Could be another fault. What system do you have? Y plan, s plan, c plan, w plan, combi boiler?
     
  4. Daniel Gould

    Daniel Gould

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    I have a combi boiler. I've tried refitting the honeywell and that works and turns the boiler off perfectly fine. No issues. Just checking I am putting the wires in the correct place

    Cheers
     
  5. CBW

    CBW

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    So it should just be live and switched live to Com and NO. That’s it.
     
  6. Daniel Gould

    Daniel Gould

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    That's what I thought. But still the boiler just stays on even when the nest is set to off .. I'm confused haha
     
  7. ericmark

    ericmark

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    I would remove one wire and put it safe in a choc block as a test, boiler should then stop working, it does seem a fault with Nest e, but taking the N/O wire out will prove it.

    As to melt in the heat, there must be a secondary problem as the TRV's should turn radiators off, so all that should happen is boiler fire up, by-pass valve open, and boiler turn off again.
     
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