like everyone before me, I need to know how to reset the service mode on the honeywell st6400. I am the house owner and the electrician who instaledl it didn't tell me about the service mode. Now I can;t find him or anyone to reset it. PLLEEEEASEEEE help e- email [email protected]. Thanks
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honeywell st6400 - Urgent
- Thread starter wyantan
- Start date
See page 6 of http://www.honeywelluk.com/documents/Full-Specification/pdf/788.pdf
(Edit: Oops, apologies - that was for the 9100/9400. I'll keep the post here though in case the 6400 is in any way similar)
Mathew
(Edit: Oops, apologies - that was for the 9100/9400. I'll keep the post here though in case the 6400 is in any way similar)
Mathew
DIYnot Local
Staff member
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