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Where does the blue wire go on the Hunter thermostat 42995B

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  • itsmechristi Jan 02, 2009

    The house was built in 1985/1987 and I believe the furnace is original with the house.

    The old Thermostat did not have batteries, however, the new one (Hunter Thermostat) does.

    The wiring in the wall is Green, White, Blue & Red

    The Thermostat Terminals are Green, White & Yellow and have a Red jumper wire connected to the RH & RC Terminal.

  • ami35miller1 Mar 22, 2009

    im changing my honeywell thermostat ( mercury) for hunter 42995bdont know how to wire .old wiring is white/w2,orang/o,blue/b,yellow/y1,green/g,red/r,the new one is marked g,w,y,rh/b,rc/o pleas help

  • Stephen Evans May 11, 2010

    How old is your furnace and does the thermostat have batteries? Steve

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Since the new thermostat has batteries you no longer need to use the blue wire if it goes to common.

Posted on Jan 02, 2009

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Without further info, the blue wire is normally the common wire, and connects to the terminal marked "c". It's best to check the terminal board at the unit and match up the colors and letters that way.

Posted on Jan 02, 2009

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1 Answer

Changed honeywell T8400C 1024 to Hunter 44760, I have five wires white, red, yelliow, green, blue. Hunter Thermostat reads "NO A/C Power.


Hi,
On the t-stat and the furnace make sure the wires are hooked like this...

Red to R
White to W
Green to G
Yellow to Y
Blue to C

then it should work..

Thermostat Wiring and Terminal Designations

heatman101

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I am replacing a White-Rodgers thermostat with a Hunter 44155C and dont know where to connect the wires. I have white, red, green, blue, and yellow wires and none are labeled as to what they are.


The Yellow wire is for cooling, the white is for heating, the red is for power, the green is for blower fan, the blue is your common wire, all you should have to do is color code the wires to the thermostat. The thermostat should have the colors labeled R,W1,G,Y,B or C for common if it's wired correctly at the Air Handler or evaporator. The blue wire should go to B, or C.

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I HAVE A HONEYWELL THERMOSTAT THAT HAS BROKEN. IT HAS 7 WIRES. G-GREEN C-BLUE R-RED Y-YELLOW L-BLACK W2/E-WHITE O-ORANGE ITS ELECTRIC WITH NO BATTERY. I BROUGHT A HUNTER THERMOSTAT WITH BATTERY. ALL IT HAS...


Shut power off to Air Handler first before hooking up the thermostat..... Looks like the Hunter Thermostat does not have a Common Terminal...... Is it a Heat Pump thermostat???? I am not a big Fan of Hunter Thermostats they do not have the features that Honeywell thermostats have.
Back to your Question:
G to G ; R to Rc&Rh : O to Y/O; White Wire to W/B; Y to Y1;
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C-Blue will not be used it was the common wire

With the Hunter Stat you will not have an emergercy heat option

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Let me know what you have in the thermostat. The wire colors are not always the same.

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There is no real color code for wiring but the standard is red wire to r, yellow wire to y,white wire to w, green wire to g, blue wire to c. since there's no c on your t- stat its probably battery operated, but in your case im betting white wire to w, and blue wire to g.

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