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Old 06-29-2011, 12:23 AM   #1
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Thermostat/Furnace/ and A/C unit


just attempted to install honeywell 6300 thermostat. connected the G W Y R wires and left the blue alone. But now a 24 code is flashing on the furnace. And the thermostat isn't working. Any suggestions?
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Old 06-29-2011, 05:17 AM   #2
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Thermostat/Furnace/ and A/C unit


check the error code legends on the back of one of the doors. code 24 on a carrier may mean blown fuse on the circuit board and improper or shorted wiring. did you have a problem B4 changing the tstat?
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Last edited by yuri; 06-29-2011 at 05:24 AM.
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Old 06-29-2011, 06:45 AM   #3
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Thermostat/Furnace/ and A/C unit


verify on the install info if you need the C connection off the furnace transformer at the subbase...if the stat is lit with no action calling stuff in it needs the C
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