Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater
I have a commercial Honeywell TB7220U Thermostat and would like to know how to Lock/Unlock the keyboard. Thanks.
With directions go to system. Then hold down 2 blanks on either side of middle for 30seconds this shows you Advanced settings . Read through and find the proper settings
Posted on Jul 04, 2009
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Posted on Jan 02, 2017
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