Question about Honeywell Focus 6300B 5-2 Days Programmable Thermostat Heater

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Thermostat wiring I'm replacing an old thermostat, which had the following wiring: red (to r); white (to w) green (to g) and blue to (y). My new unit is a Honeywell RTH2310, which has the following connections: r, w, g, y. I connected the red to the 2-wire jumpered connection; the white to the (w), the green to (g) and the blue to (y). No workee. Any suggestions?

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L is for a common wire if t-stat does not use batteries then this wire will have to be connected

Posted on Jan 13, 2009

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I wont to replace my old robert shaw 9400 thermostat with a new honeywell rth111b thermostat but dont known the color wireing diagram


Hello, if this is a standard straghtcool/heat unit then Red- R terminal or Rh white- W terminal Yellow - Y terminal Green- G terminal Blue- Common terminal ( not always used) but ifyou do have a blue wire it will connect to this terminal.

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there is it all depends on how many strands of wire are in there, they start at 2 wire and go to i think 8 wire and maybe more.
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What are you trying to wire up?
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R = Red One Side of 24 volt Transformer
G = Green Blower
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with one transformer for both units
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With 2 transformers one for indoor unit
And one for outdoor unit
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R = Red One Side of 24 volt Transformer
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