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I need to know what the brown wire marked "c" means in my simple comfort 2200

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My window air conditioner is making alot of noise and it is blowing alot of water out through the front vents. It doesn't matter what mode I am in. Can this be fixed or do I have to get another one?

Posted on Jul 31, 2010

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Hi, this C stands for your common wire or terminal. On a transformer, you will have a primary side which is high voltage in and a secondary side which is lower voltage out. On this in order to complete a circuit, you have 2-wires on the secondary side, one is the hot wire and the other is the C or common wire. With out it you would only have 1/2 of the circuit and nothing would work. On some thermostats, they will have a C connection, but may not need to use it as most new thermostats use batteries, so its not used a lot. On the transformer, it must be used to complete a circuit. I hope I have answered your question for you and explained a little in detail. Please rate me on this and be kind as I am sure you will. If you need my help on your heater or a/c, please contact me by my user name below.
A/C, Heating, & Refrigeration Contractor

Posted on Jul 30, 2010


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My simple comfort 2200 thermostat has a brown wire hooked to the e terminal. what is the e terminal for?

Likely for emergency heat. When the heat pump is in defrost mode, due to extremely low ambient temps, e is your indoor heat strips.

If you need further help, reach me via phone at

Jul 02, 2017 | Heating & Cooling


Trailer Wiring Standards (Color Codes/Plug Marks)

Hello all,

For those of you that have or occasionally borrow trailers and look at the wiring plugs with disdain (I mean face it they don't make sense, grd is white, +12vdc is black, etc), this is for you.

Plug Types/Application
7 Way - RV Trailers, Horse and Utility Trailers
6 Way - Horse, Stock and Utility
4 Way - Utility Trailers

Columns are Color, Function, Mark on the plug.

Seven wire Trailer plugs

Horse, stock or utility trailers:
White = Ground - 1
Blue = Electric Brakes - 2
Brown = Tail and clearance lights - 3
Black = Battery, aux power - 4
Yellow = Left turn/Brake - 5
Green = Right turn Brake - 6
Orange or Purple (not both) = Auxilliary or Reverse - 7

Recreational Vehicle:
White = Ground - 1
Blue = Electric Brakes - 2
Green = Tail and clearance lights - 3
Black = Battery, aux power - 4
Red = Left turn/Brake - 5
Brown = Right turn Brake - 6
Yellow = Auxilliary or Reverse - 7

Six wire trailer plugs:

Horse, stock or utility trailers:
White = Ground - GD
Yellow = Left turn/Brake -LT
Green = Right turn Brake -RT
Brown = Tail and clearance lights - TM
Red or Black (not both) = Battery, aux power - A
Blue = Electric Brakes - S

Recreational Vehicle: (color, use, plug mark)
White = Ground - GD
Yellow = Not used -
Brown = Right turn Brake - RT
Green = Tail and clearance lights -TM
Black = Battery, aux power - A
Red = Left turn/Brake - LT
Blue = Electric Brakes - S

Four wire plugs:
White = Ground
Yellow = Left turn/Brake
Green = Right turn Brake
Brown = Tail and clearance lights

Ground should be 10ga.
Others 14 ga

Best regards

on Sep 09, 2009 | 1981 Ford F 150

1 Answer

Simple comfort 2200 ~ what is the E terminal for? the brown wire is hooked to E terminal

E is for emergency heat which locks out the outdoor heat pump and brings on auxiliary heat when the t'stat is switched to "emergency" . This circuit will also be energized when the outdoor unit goes into defrost.

Jul 02, 2017 | Heating & Cooling

1 Answer

Simple comfort 2200 thermostat not working properly

We have a Simple Comfort 2200 Electronic Thermostat and last night it quit blowing cool air and the # sign beside the air temp (the set to temp) starting blinking

Aug 11, 2012 | Heating & Cooling

1 Answer

Have a four flat utility trailer wiring. Need to know which wire to splice into for left turn signal, brake & running lights in the back of van. Also need to know for right as well.

the yellow wire is the left signal the brown is the taillight wire the green wire is the right signal wire and the white wire is the ground wire.the brake lights work through the signal wires.think of it this way yellow markings on the roadway is left of the car,green grass is right of the car brown is the darkness of the road behind you and the only thing i have for white wire is clouds(even if its opposite of ground)

Mar 16, 2011 | Dodge Grand Caravan Cars & Trucks

1 Answer

I need to know what wires go to each marking

com=common= [ L ](live)same, the one that kills you. =red/brown N - neutral=black/blue Earth=green or green&yellow striped old colours= red, black, & green. new colours= brown, blue & green/yellow. L,N E.......... If you are uncertain of your abilities to wire up ,ask a competent electrician .........your life is worth more than £50.00.

Mar 08, 2010 | Water Heaters

1 Answer

Switching thermostats

The two wires are the control circuit from the heater your running. They go to the thermostat and close when it get below the thermo. setting and start the heater.

If you need further help, I’m available over the phone at

Jun 28, 2009 | Honeywell Electronic Programmable...

1 Answer

Clarion marine stereo M2455

Don't worry about the brown wires. They are for telephone mute.

The yellow is Memory (constant 12 volt, so battery is fine), but the red should go to a 12 volt source that turns on and off with the key.

Aug 05, 2008 | Clarion DB245 CD Player

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