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japalk
Jan 22, 2008, 05:56 PM
Hello,
I'm switching a bunch of old thermostats :( in my church for programmable types:) , and have run into the problem that I don't know what the letters on the connections stand for:confused: . Can you help:rolleyes: . John

hvac1000
Jan 23, 2008, 12:03 AM
Hi John.

Look in the beginning of this board under sticky notes. Much information is there on thermostat wiring.