How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Airheatman Your Own Question

Airheatman
Airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 5418
Experience:  Furnace, A/C and heat pump specialist.
16514686
Type Your HVAC Question Here...
Airheatman is online now
A new question is answered every 9 seconds

My Goodman heat pump is not working. Need troubleshooting

Resolved Question:

My Goodman heat pump is not working (The fan and the compressor. No cold and no heat). All the correct 24 volts are coming to the five wires coming from the air handler to the heat pump. There is 24 volts on the yellow wire connected to the fan capacitor. There is no 24 volts on the yellow wire on the defrost control board that leads to the contactor. There is also no 24 volts on the other yellow wire connected to the contactor. The yellow wire that is connected to the air handler goes inside the lower part of the casing (to the pressure switches?). This wire has 24 volts when there is a demand for cold from the thermostat. It seems that the low voltage coming from the thermostat is lost somewhere in the unopened parts of the casing. Do you have an idea about what might have gone wrong? Thank you very much for your trouble!

Make : Goodman 5 tons
Model : SSZ140601AD

Already Tried:
Replaced the White_Rogers programmable thermostat with a Honeywell programmable thermostat. Verified all the connections from the thermostat to the air handler, and from the air handler to the heat pump. Verified the 24 volts on all five wires coming from the air handler to the heat pump. All these low voltages are correct. But the low voltage on the yellow wire is lost somewhere in the system. It goes back to the fan capacitor but not to the lower part of the contactlor.

Submitted: 3 years ago.
Category: HVAC
Expert:  Airheatman replied 3 years ago.

To start with the yellow wire is a control wire and should not connect to the capacitor. Are you talking about the contactor.? Here is a picture of the capacitor and the contactor

capacitor on a <a href=Goodman heat pump" width="100" height="100"/>
Full Size Image
Above is the capacitor
Contactor on a Goodman heat pump
Full Size Image

Above is the contactor


Let me start by asking if you replaced the thermostat trying to fix your problem was the unit operating fine and you just decided to replace the thermostat and then the problem arose after installing the new thermostat?

Customer: replied 3 years ago.

There are three spots for connexion on the capacitor : FAN, C, and HERM. A brown wire and a purple wire are connected to FAN. A red wire is connected to C, and a yellow wire is connected to HERM. It was like that when the heat pump was received.

I had the same problem before I replaced the contactor. I wanted to make sure that the thermostal was good.

The replacement did not solve the problem at all.The 24 volts coming from the thermostat do not reach the defrost control board and the contactor. I am trying to find if some other electrical part is defective.

Customer: replied 3 years ago.

I am trying to find the reason why there is 24 volts coming from the thermostat and no low voltage at all at the contactor. This prevents the contactor from closing to activate the fan and the compressor.

Expert:  Airheatman replied 3 years ago.

Ok those wires going to the capacitor have nothing to do with the 24 volt circuit. Those are high voltage wires(not in your control circuit at all),So lets don't concentrate on the capacitor. Your control wires should go to the board in the outdoor unit. C,W2,O,Y and R . Lets start at the board with your meter.With thermostat calling for cool, Tell me if you have 24 volts between C and Y where they connect to the board

Airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 5418
Experience: Furnace, A/C and heat pump specialist.
Airheatman and 2 other HVAC Specialists are ready to help you
Customer: replied 3 years ago.

No. I have nothing at all. Why the heat pump is not working. There is no voltage between the y and the C on the Defrost control board. What would be the next step?

Expert:  Airheatman replied 3 years ago.

Ok, if you have no 24 volts between common "C" and cooling "Y" at the board, we are loosing it before we get to the outdoor unit. Those control wires come starlight from indoor to the board ,correct?

Have you checked to see if you might have a float switch in the drain inside that might be be breaking the circuit?

Goodman heat pump parts

Customer: replied 3 years ago.

The common C goes from inside to the board in the outdoor unit. The Y from inside goes to a blue and pink wire that goes into the lower part of the casing. I do not see where it goes. The Y on the board is connected to the contactor, but it does not carry any voltage at all.

I have not checked about a float. If you wish, I can do that later and contact you again tomorrow.

Expert:  Airheatman replied 3 years ago.

Ok, first, can you disconnect the "Y" yellow wire where it comes into the unit (probably a wire nut) and check between the yellow from indoor unit to he "C" at the board?. If you have 24 volts there, it is most likely a pressure switch in the outdoor unit.Can you do that tonight?

Customer: replied 3 years ago.
I will go out and do that now. I will get back to you soon.
Expert:  Airheatman replied 3 years ago.

I will be here

Customer: replied 3 years ago.

We have the 24 volts there. Then, as you say, the problem is probably with a pressure switch. Is this a part I can replace myself or should I call in a repair person?

Thank you for your help so far!

Expert:  Airheatman replied 3 years ago.

You will have to call in a tech because the pressure switch is welded into the refrigerant line. Also it is a possibility that the pressure switch is not bad.Your system may be out of freon. I realize it is not that old, but it is not entirely out of the question that you don't have a refrigerant leak somewhere..Equipment leaks are much more common today with the quality of copper and material .

Airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 5418
Experience: Furnace, A/C and heat pump specialist.
Airheatman and 2 other HVAC Specialists are ready to help you

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy Bagley, IA
< Last | Next >
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy Bagley, IA
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • gotoman for ac

    HVAC Technician

    Satisfied Customers:

    4831
    51 years of experience install design and repair of all makes and models of AC
< Last | Next >
  • http://ww2.justanswer.com/uploads/SE/ServiceTechRus/2012-6-7_2119_056.64x64.JPG gotoman for ac's Avatar

    gotoman for ac

    HVAC Technician

    Satisfied Customers:

    4831
    51 years of experience install design and repair of all makes and models of AC
  • http://ww2.justanswer.com/uploads/AL/alumalite/2012-5-10_234018_shutterstock506249951forJA500.64x64.jpg Phil's Avatar

    Phil

    Mechanical Engineer

    Satisfied Customers:

    4582
    Retired HVAC/ Electrical & Boiler contractor. Industrial
  • http://ww2.justanswer.com/uploads/skibum0101/2008-12-16_015819_just_answer.jpg Rick Mather's Avatar

    Rick Mather

    HVAC Technician

    Satisfied Customers:

    3133
    35 years experience, HVAC
  • http://ww2.justanswer.com/uploads/RY/Rygis20/2011-5-7_3143_DSC5324.64x64.JPG Matthew's Avatar

    Matthew

    HVAC Technician

    Satisfied Customers:

    2010
    14 years experience in the HVAC field of service, installation, Manual J & D calculations
  • http://ww2.justanswer.com/uploads/KE/kentguidry/2011-9-26_214316_0059.64x64.jpg Kenton Guidry's Avatar

    Kenton Guidry

    HVAC Technician

    Satisfied Customers:

    963
    12 years install/service experience.
  • http://ww2.justanswer.com/uploads/solarman1947/2009-12-13_223915_phpkKBcXq_c2PM.jpg Rick Ridley's Avatar

    Rick Ridley

    UK Heating Engineer

    Satisfied Customers:

    871
    Retired But have had 30 years on the tools, Ex CORGI
  • http://ww2.justanswer.com/uploads/Ironheadfan/2009-12-18_222416_pump_005.jpg Tom's Avatar

    Tom

    HVAC Technician

    Satisfied Customers:

    770
    16+yrs HVAC/R service. Residential Commerical Industrial
 
 
 
Chat Now With A HVAC Technician
Airheatman
Airheatman
Heating & Air Conditioning Contractor
3528 Satisfied Customers
Furnace, A/C and heat pump specialist.