Need wiring schematic for central air conditioning. Mod#TA930H1H has three wires back to furnace from condensor. How do they get wired on furnace control board?

You have a bad transformer. It may be the capacitor, but i,m thinking the transformer.

The condensor and evaporator must be matched. You are going to have to design your own wiring diagram to integrate all of these together. This is a tough job , unless you really understand electricity and air condition control circuitry.

This is if you have gas furnace and central air conditioning.
Normally this is the way.
Red wire to R (or if your stat has Rc and Rh, wire to both of these
White wire to W
Green wire to G
Yellow wire to Y
Blue wire to C
If you want to check, before you connect to stat. Connect red and white (heat should come on)
the connect red and green (blower should come on) Normally yellow is for air conditioning and Blue is common DO NOT CONNECT ANY WIRE DIRECTLY TO BLUE, if blue is common it would short out fuse

MOST UNITS NOT HEAT PUMPS  WIRE UP WITH 2 WIRES TO CONDENSER RED WIRE AND WHITE . WHITE GOES TO COMMON C ON FURNACE AND RED TO Y TERMINAL OF FURNACE Y ALSO GOES TO Y ON TSTAT. BOTH YELLOW WIRES MUST MEET AT Y OF FURNACE.  WHITE FROM STAT TO W   GREEN FROM TSTAT TO G AT FURNACE IF YOU HAVE C ON TSTAT HOOK UP BROWN WIRE OR BLUE FROM COMMON TERMINAL WHERE YOU HOOKED UP CONDENSER WHITE WIRE AT FURNACE TO TSTAT , MOST THERMOSTATS DONT NEED C RUN FROM FURNACE. THE TWO WIRES GOING TO CONDENSER IS -  AND + TO ACTAVATE CONTACTOR IN OUTSIDE UNIT

HI; A heat pump requires an 8 conductor wire for control low voltage wiring...Thats from the condensor to the air handler and from the t stat to the air handler...

For heat pumps........


R = Red wire (hot24v)
G = Green wire (blower motor)
Y = Yellow wire (AC condensor)
C = blue wire (common)
O = Orange wire (reversing valve)
W1 or W2 = White wire (emergency heat)


For gas furnace


W1 = white (gas furnace)
R = red
G = green
Y = yellow
C = blue

check capacitors, make sure the condensor coil is clean. sounds like the compressor is overheating. is the condensor fan motor still turning when it stops cooling. if not check low voltage wires to condensor, furnace and t-stat

If new motor is 4 wire verses 3 wire use seperate capacitor between brown wires and don't use terminal on 3 pole cap. If this motor has a white strip on one brown wire you can wire it the old way using only 1 brown wire and tape off the other. Can't remeber this morning which brow wire to use . I need to leave. Goole replacemotor with 2 brown wires for more info or call where you bought it. Sorry got to run.

r and rc @stat to r on furnace
w @stat to w on furnace
g @ stat to g on furnace
y @ stat to y on furnace
from furnace 2wires going to out side unit typical red & white wire. red goes to y @ furnace and white goes to the neutral of the trans former . BE SAFE turn off power.

r = Red wire Hot
w= White wire heating
g = Green Fan
y= yellow cooling

if their is a B or C @ the furnace terminal board that the neutral . Tom

you have the motor connected on more than one speed in heat mode. make sure inly one mode is connected