honeywell st6400 - Urgent

Joined
7 Oct 2010
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Location
London
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United Kingdom
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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