My dog chewed up wiring on outside unit and i dont know where they hook up it is a 4 wire set up with red white blue and green large ac unit dog chewed thru little brown wire leading to house and now ac wont come on

We are talking about a 115 Volt AC motor, I believe. The black wire will be connected to the small blade of a polarized plug, also known as a cap. The white wire will attach to the large or wide blade of that same plug. The green wire will attach to the U shaped prong.

I trust this answers your question?

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R-Red is power
Y-Yellow is cool
B-Blue is cool as well
G-Green is fan leg
W-White is usually heat Leg


If you have no indoor unit and this is a ac/gas or
electric outdoor unit try this.

R to R/Red to Red
G-G/Green to Green
Y-Y/Yellow to Yellow
W-W/White to White
-Dont Hook up Blue.

Turn power back on turn the fan to on,fan should run
Turn to Heating, heating should come on
Turn on Cooling,if cooling does not come on switch yellow with blue.

HI there well i think what you dog chewed on was the thermostat wires. if you tell me the colors maybe i can help you out.
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Those are the low voltage wires from the thermostat and transformer. Yes he can just match up the colors and splice with wire nuts or something else to hold the tight. If the transformer got shorted out during any of this it may need to be replaced. Hook them up and if the unit runs, then no problem with the transformer.

If you have a central air conditioner, or a split system, where the indoor unit is attached to the furnace and a outdoor unit is located outside of the home. 2 copper lines will be connected to it, a larger and a smaller one. If it is a air conditioner and not a heat pump, the A/C usually uses 2 wires, that are connected. Allot of times a installer will use a 3 wire thermostat wire, to run to the outdoor unit, if this is the case, the third wire will be folded back out of the way.
The color of the wire is usually picked by the installer, I myself usually use white and red and fold the green out of the way. If you only had 2 wires hooked to it to start with, it really would not make a differace which one you hook up to either one of the yellow wires.
All you are doing it having one wire coming in and one wire leaving,,,, just creating a complete circuit, just don't connect the two yellow wires together.
Example: If you have 2 yellow wires on the A/C unit and 2 wires coming from the house "example a red and a white" hook the white to "One yellow wire" and the red wire to "the other yellow wire".
You are just creating a complete circuit, when the thermostat calls for cooling, it creates a magnetic pull and closes the contact points, in the air conditioner, outside, this allows the 220 volt to flow to the compressor,,, and ahhhh cooling!
I hope I have not confused you, I am just starting to help on this site and still trying to make things understandable.
Wish you the best,
Paul Gibson

outside unit L1 and L2 are load (input 240vac)
then you have control voltage, usually yellow and blue (24vac) this connects to some 18/2 thermostat wire which goes inside as white and red.

note: this unit may only need 24v control which is 2 wires from the inside unit and also 3 wires 2 hot 1 ground for line voltage.

STANDARD WIRING
on the inside unit you have green, white, blue and red control wires.

on your thermostat you have white, red, yellow and green

you run the wire from the outside unit to the inside unit. then run a 18/4 wire to the thermostat if wired and join the following wires.

inside unit thermostat outside unit
green------------------------green
white-------------------------white
red----------------------------red
blue-------------------------------------------------------blue
yellow--------------------yellow

Paul, you will need to look at the indoor unit and determine which wires from outside are connected inside. let me know. more then likley they color coded it but better to be safe. also does the fan inside still run if you switch thermostat to fan ON. if not the transformer may have blown, if yes you need to make sure you shut the breaker controlling the inoor unit off while your messing with the wires, or you will blow the transformer in the furnace

Mac

. your blue is probably common and if you hooked it to Y you shorted the transformer or blew the low voltage fuse. Green is fan, yellow is AC, Red is 24volt. Is it a heatpump or just ac? I think its probably a heat pump and your brown is your Reversing valve it needs to be hooked to O on the new stat. If its a heatpump your tstat must be a 2heat 1 cool stat w/ aux heat. Without knowing what terminals the wire were hooked to on the old stat you may have to look at whats hooked up at airhandler( furnace) and on A/C (heatpump) tobe able to determine what goes where on the new one.

It sounds like a 120 volt line coming in from the pole. Red is the hot wire, white the common or neutral wire, and the green ground. Hook the red and white to the two main wire lugs in the unit and the green goes to the frame or ground lug that will tie to the frame.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c

what is the make of your air condition and is it portable or is it central air.