Question about Goodman CKL49AR49 Air Conditioner

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I have an HVAC with 8 wires, and a new thermostat with 4. How do I identify which wire is what? the blower in the attic states it's a GMC. The only model number I can see says A49-20. It has an external A/C compressor.

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Red is 24v from transformer to R onT-stat
Green is from indoor fan at air handler to G on T-stat
Yellow is to compressor for call to cool mode and is Y on T-stat
White is call for heat and is W on T-stat
Orange is to the reversing valve on a heat pump
Blue and or Black are used as common in most cases

Posted on Oct 13, 2010

Testimonial: "Thank you greatly for the help. I will try those and post back soon; the cold is a great motivator to fix this thing =)"

  • chrisrob1469 Oct 13, 2010

    Inside the thermostat some don't match up.
    w2= ? (white?-has a jumper over to E)
    E= ?
    O/B= ? (orange

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2006 GMC 1 ton heater fan not working


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Check the blower motor wiring connector for voltage and ground with hvac on.
Can you check for hvac trouble codes? Some of the national brand auto stores will check some codes for free.

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What could be causing my HVAC secondary circuit to keep blowing a fuse after the AC Compressor ran for 10 hours?


Yes its a short. I've seen a weakening component cause that but 99% of the time its a short. Look where your control enter your o.d. unit. The wires can rub on the metal where the small hole is for the wires to go through. If your o.d. unit has any low voltage wires inside where the piping to the compressor are, look there. A low or high pressure switch may be installed and the low voltage wires inside can rub on a copper line causing an intermittent short. Look anywhere a low voltage wire can touch anything , other than intended points. If its a component then you may end up with new parts all over and still have a short. The control wires can get damaged by varmits in the attic, crawl space, and where the wires go through the wall or sophet. To isolate it may take a pile of fuses or a transformer with a micro-breaker can be installed. Basically has a 3-5amp micro breaker that trips and can be reset. If you were to remove all control wires leading to the o.d. unit, start the cooling, and it shorts then your short is not at o.d. unit. With o.d. control wires wired in at the ahu, disconnect the low voltage wires from the o.d unit. Cycle cool and if it shorts, the wire between is the cause. If it don't short, then you know its at the o.d. unit. At the o.d. unit, if it has any low voltage safeties(low pressure, high pressure, delay timer, ect...) you can maybe bypass all to allow the contactor to be the only component wired in the low voltage circuit at the o.d. unit. And if it shorts keep chasing it. Bugs and geckos can get behind circuit boards causing a short. Ants in any components can cause a short. Hard to help more from here. Above all, work safe!

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1 Answer

2000 jeep grand Cherokee limited only blows cold air despite c.c setting position. Also what I'm Guessing to be the blower control module hot lead burned through end of wire/ wiring harness/ and circuit...


lead burned through
that's easy
using the wrong fuse size
and the feed is shorted,
the correct fuse prevents the burned wires.

here are the HVAC pages
http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service

lots of things can short. in cars. (topic Hvac)
  • the wires.
  • the connectors
  • the HVAC motors (actuators)
  • the blower.

if you had stated the exact wire color and what it connect to exacty
we can state who shorted.

Fuse 1 , 40amp runs the blower. dark green.
Fuse 20 , 10amps runs others.
Fuse 7 runs zone control,,,10A and all 4 damper motors actuators.
see 8w-42-6 pages.

ok you have your FSM and now can find who connects to what.

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Diagram for the placement of the fan blower motor in a 2003 Dodge ram 1500 truck


From autozone.com
2003-04 Vehicles

CAUTION On vehicles equipped with airbags, disable the airbag system before attempting any steering wheel, steering column, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the airbag system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to take the proper precautions could result in an accidental airbag deployment, possible personal injury or death.

NOTE The blower motor is located on the passenger side of the vehicle under the instrument panel. The blower motor can be removed from the vehicle without having to remove the HVAC housing.
  1. Disconnect and isolate the battery negative cable.
  2. Disconnect the wire harness connector from the blower motor.
  3. Remove the three screws that secure the blower motor to the HVAC housing.
  4. Remove the blower motor from the HVAC housing by rotating and tilting the blower motor as needed for clearance.
  5. b8492c4.gif

Fig. View of the resistor block screws (1), blower motor resistor (2), resistor block wire connector (3), blower motor screw (4), blower motor (5), blower motor wire connector (6), blower motor screw (7), HVAC housing (8), wire harness retainer (9), blower motor screw (10)

    To install:
    1. Align and install the blower motor into the HVAC housing.
    2. Install the three screws that secure the blower motor to the HVAC housing. Tighten the screws to 20 inch lbs. (2.2 Nm).
    3. Connect the wire harness connector to the blower motor.
    4. Reconnect the battery negative cable.

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1995 GMC Yukon. How do you get to the heat resistor to replace it.


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I bought a Honeywell programmable thermostat RTH2310 to replace my 10 year old Honeywell thermostat. My old thermostat is a 4 wire system but also has a jumper from Y to 1. New system does not tell me what...


It depends on the type of thermostat you have.
Do you have a 4 wire or 5 wire T'stat?
The red jumper wire was for a 5 wire t'stat with 1 transformer, the red jumper actually should have been from R to 1.
So you need to trace the wires back to the furnace and make sure they go to the locations identified below.
if you have a 4 wire t'stat then you don't need that jumper, if you have a 5 wire t'stat then you do need that jumper but it should go from Rh to Rc.
4 Wire Termostat
R = Red One Side of 24 volt Transformer
G = Green Blower
Y = Yellow Cool
W = White Heat
5 Wire Thermostat
with one transformer for both units
Rc One Side of 24 volt Transformer
Rh Jumper Rc to Rh
G = Green Blower
Y = Yellow Cool
W = White Heat
t'stat?

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Blower in attic & AC unit outside continuously run


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