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New thermostat - not smart

Discussion in 'Home Automation' started by QfanatiQ, 3 Oct 2020.

  1. QfanatiQ

    QfanatiQ

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    Our honeywell has stopped working boiler end
    We've been quoted a lot to have it replaced, small job clearly no interest.
    Thinking surely I can do this myself;
    - Wire in replacement
    - Conect to new wall thermostat
    I'm not interested in a smart router attached option.
    Cheers,,,,,Q
     

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  3. Alec_t

    Alec_t

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    ..... or just use a programmable thermostat?
     
  4. stem

    stem

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    It looks like you have a Honeywell R6660D Receiver, and Wireless Battery Operated Thermostat. The wires are connected to the Receiver and the Thermostat communicates with it wirelessly telling it to turn the heating 'on' or 'off' as required.

    If you want to leave the existing 'iflo' timeswitch (actually a rebadged Drayton) in place and just replace the thermostat and receiver you can do. If you go down that route you can buy a new wireless receiver and thermostat and simply replace the those you have. Or...

    ...Buy a simple wired thermostat which will replace the existing receiver and thermostat, but you may have to run a new cable from the receiver to the location of the thermostat. Or...

    ...do as @Alec_t suggests and replace the 'iflo' timeswitch and existing thermostat with a programmable thermostat that contains both functions in the one device.

    For DIY a new new wireless receiver and thermostat would probably the easiest option wiring wise. Although from your photo of the R6660D receiver it appears some wires have been removed from A & B, I assume this is to get the heating working without the thermostat, you will have to reinstate them.
     
    Last edited: 3 Oct 2020
  5. ericmark

    ericmark

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    Have you replaced battery? I know that thermostat and batteries last a long time.
     
  6. QfanatiQ

    QfanatiQ

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    Sorry, I've not been clear, when I said 'not wireless' I meant, smart, through router, like a hive etc
    I will need wirelessfrom boiler receiver to thermostate
    The wall part still works, it's that boiler end part that's gone belly up.
    Cheers,,,,,Q
     
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  8. QfanatiQ

    QfanatiQ

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    It's the boiler end that's stopped working
    Did check the battery and connections
    I'm simply hoping I can by a new thermostat for living room, and whatever that bottom piece is.
    The programmable bit above still works, would that need replacing too?
    Cheers,,,,,Q
     
  9. stem

    stem

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    You can buy a replacement R6660D receiver swap them over and then use the 'Teach in' facility to link it to the existing room thermostat.

    Are you 100% sure that it's the receiver that's at fault and the thermostat is OK? if not you would be best to replace both items. You can buy them as a kit.
     
  10. QfanatiQ

    QfanatiQ

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    Brilliant, a straight swap suits me.
    And buy together.
    The thermostat still lights up, but when I switch the other item off, then on, lights light up, then red, then off, nothing.
    Cheers,,,,,Q
     
  11. ericmark

    ericmark

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    I agree hard wired is better, my Nest is hard wired, however it does depend on why we have a thermostat?

    OK I know that can sound daft, but not really, the thermostat can be in the main room as set room temperature, but it can also be in a cool room and designed to stop the boiler cycling.

    We can turn a non modulating boiler off/on with a varying mark/space ratio to stop the hysteresis, and that is what your old thermostat did, but do the same with a modulating boiler and it causes the boiler to stop extracting the latent heat. So it runs less efficient.

    As to if the loss of efficiency is enough to worry about I don't know. And I don't think many people actually know either, there are so many variables.

    So with a modulating boiler either the thermostat is only used to switch off boiler in good weather to stop cycling or it is a modulating thermostat that turns boiler up/down not on/off.

    Having said that I had same thermostat in last house and I did nothing. It works even if not efficient. And in this house I don't have a modulating boiler, I use oil now.
     
  12. DIYnot Local

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