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  1. M

    Honeywell ST699B Battery

    From what I have heard, sometimes they are replaceable, sometimes they are not. What do the replaceable ones look like ? I don't want to try to get one off that won't come off !
  2. M

    Honeywell

    A Honeywell ST499A/ST699B Time controller/Progammer. How do I get the front off/inside it ? I think it must have been installed during the construction of the airing cupboard and access is very resticted. It is driving me potty.
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