Question about Honeywell Programmable Thermostat Heater
You are on the right track, however, the biggest problem I see is that the new Honeywell thermostat that you have is for a heat pump system and judging off your old thermostat, you don't have a heat pump. A heat pump system requires more wires and different terminals for the extra components it has like the reversing valve and such and since you don't have any of those, your thermostat is trying to tell the old unit to do things it simply cannot do. Your wire colors are correct as you described and on a standard thermostat you will have the same terminals as you do now. C/B(Blue)= is common by the way. One way to look at the RC/RH terminals is to think of it as both 24v, one being for heat(H), and one for cool(C). When they are jumped together, it allows the thermostat to use one wire for power instead of two (Red). Hope this helps and good luck!
Posted on Jul 14, 2010
RC - power for cooling
RH - power for heat
since you have only one transformer you need to put a jumper with this two terminals.
RC/RH - R ( power )
G - G ( fan relay)
W - Aux ( heat relay)
Y - Y ( cool relay )
this is so simple if the Honeywell thermostat is doing erratic operation maybe you need to reset the thermostat.
Posted on Sep 15, 2009
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Posted on Jan 02, 2017
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