update
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I took out the old analog (mercury switch) thermostat and put a homedepo thermostat that we got with our giftcard from our realator. we've the standard 8 wires run to the furnace (which piggy backs to the ac, and would include the heat pump im we had one) - well, i took the old thermostat appart (4 wires were used) and the wires were wearing out and not making connectivity once installed in the new one. i got it up and running using the other 4 wires stacked with the existing wires., so effectively i've used 100% redundancy to get it going. odd. i pulled more of the wire out, stripped back both ends, reseat everything, tried the old thermostat (tried many things) and this was all i could get running. oh well, at least we have 7 day programmable and it's digital! cool. i doubt we'll ever get a head pump so my home jobber on the wire from the thermostat to the furnace should not ever need tampering with.
I took out the old analog (mercury switch) thermostat and put a homedepo thermostat that we got with our giftcard from our realator. we've the standard 8 wires run to the furnace (which piggy backs to the ac, and would include the heat pump im we had one) - well, i took the old thermostat appart (4 wires were used) and the wires were wearing out and not making connectivity once installed in the new one. i got it up and running using the other 4 wires stacked with the existing wires., so effectively i've used 100% redundancy to get it going. odd. i pulled more of the wire out, stripped back both ends, reseat everything, tried the old thermostat (tried many things) and this was all i could get running. oh well, at least we have 7 day programmable and it's digital! cool. i doubt we'll ever get a head pump so my home jobber on the wire from the thermostat to the furnace should not ever need tampering with.