On Sat, 02 Aug 2003 15:12:42 -0400, meirman wrote:

What to do next?

Use the relay you are controlling remotely to disconnect the Green
lead of the thermostat from the Green lead of the furnace.

In other words, take the Green lead from the furnace-AC and connect it
to the common connector of a double throw relay switch. In the normal
position, have it connected to the Green lead from the thermostat, as
it is now.****

In the activated position, have it connected to the Red lead from the
thermostat/furnace-AC. Of course you don't have to and can't cut the
Red wire.

Thank you for the answer! It does make sense to me now that I've learned
all that I've learned from this thread. And, I do like the "fail safe"
nature of your design.

The only fly in my ointment now is the relay I have (for my home
automation system) is single-pole, single-throw. There is no connector on
the "normally-open" side so I will have to find another relay that has
contacts on both sides that will work with my home-auto system.

Peter
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