On Sat, 15 Feb 2014 22:15:48 -0500, wrote:

On Sat, 15 Feb 2014 21:05:48 -0500, micky
wrote:

On Tue, 11 Feb 2014 19:03:04 -0500, wrote:


A relay coil can fail in such a way as to be able to hold a contact
closed, but not be able to PULL it closed. Check the relay coil. Also
check the control transformer voltage. If it is supposed to be 24 and
it is only 16, the reays are not going to function properly. Also
check the wires for high resistance.

Will do.

BTW, in the original thermostat, a round Honeywell that was so popular
for so long in the 60's and 70's (not the one I'm using now,) there
were some square sine waves circuit traces on the little round circuit
board, and I see something on the heating cooling wiring schematic that
seems to correspond.

On the schematic they are labeled HTG ANT and CLG ANT.

Do you all know anythihng about these?
Heating anticipator and cooling anticipator

Ah. I thought they were heating antenna and cooling antenna. Your
answer makes a lot more sense.

P&M because it's been two days and the group is busy.