Recent content by Quagga2006

  1. Q

    Honeywell ST699B programmer

    Hello everyone, hope someone can help. My Honeywell ST699B seems to have failed - the display is blank and, even though teh boiler is working fine, the heating won't come on. Do I need a new unit? (By the way, I think it's an older version as it doesn't have a reset button). If I replace...
Back
Top