st9420c

  1. N

    Honeywell ST9420c -do I have a re binding issue?

    Since turning heating on again, I've had problems with the heating not coming on, or going off before the set temp is reached. Honeywell answered my enquiry and suggested I might need to rebind the st9420c and DT92E. After many tries I finally completed this process for the heating. I've...
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