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 Matthew Your Own Question

Matthew
Matthew, HVAC Technician
Category: HVAC
Satisfied Customers: 2014
Experience:  14 years experience in the HVAC field of service, installation, Manual J & D calculations
6927568
Type Your HVAC Question Here...
Matthew is online now
A new question is answered every 9 seconds

How can I turn on my Honeywell Air Conditioner?

Resolved Question:

My air conditioner is not turning on, I have an Honeywell LR69071 thermostat and I want to make sure it is not a thermostat problem, as I moved it from one location to another; before I call an A/C service. Which terminals on the thermostat control the A/C, and how would I be able to tell if a signal is being sent to the unit in order for it to turn on? Is there a voltage reading I can take?

Submitted: 4 years ago.
Category: HVAC
Expert:  Matthew replied 4 years ago.

When the thermostat is set to cool the Y terminal should become live with 24v. To bypass the thermostat and see if the system works take the wire under Y out and put it under the R terminal with the wire already there. When these two wires touch the system should come on.

Customer: I am not getting any voltage at Y1, I am reading that between the G terminal and Y1. When I touch the yellow to the red wire the system does not come on. Is the G terminal ground?

Matthew: G is the fan. R is always hot 24v, Y is hot when there is a cool call, G is hot when there is a fan "on" call, W is hot when there is a heat call. See if you get 24v at the R terminal.

Customer: What do I use for ground to read the voltage?

Matthew: If you switch the thermostat to fan "on" does the fan come on? If there is not a C terminal hooked up on the thermostat then you are not able to.

Customer: No, the fan does not come on. However, it does come on in Auto with a heat call.

Matthew: Is this an electrical furnace, with a heat pump outside?

Customer: Yes, it is an electric furnace with a heat pump.

Matthew: Okay, the blower call in heat is controlled through the furnace, and has nothing to do with the thermostat. Does the outdoor unit come on like it should in heat mode?

Customer: Yes it does.

Matthew: This thermostat requires that there is a jumper wire from the W1 terminal to the Y1 terminal. It seems you only have power to the W1 terminal so it energizes the outdoor unit like it should for heat, but not for cool when the Y1 is energized.

Customer: I do not have voltage on Y or R, I am reading to a switch ground on a wall switch adjacent to the thermostat. I do not have a jumper between Y1 and W1, but I will give it a try. There are no wires on W1, is that right? I have wires on W2, X, R, E, O and Y1.

Matthew: The jumper may be internal behind the plate connecting the two terminals, the schematic just shows the two jumped. X is your common test voltage with this terminal. X to R should have 24v all the time. If heat comes on, then R has to have voltage, otherwise the heat wouldn't come on.

Customer: I have 26 volts X to R and X to Y1 with a cool call.

Matthew: Okay, then the thermostat is doing its job, so you need to figure out what is wrong with the outdoor unit.

Customer: I also have 26 volts X to G but the fan is not running. The fan does come on though in Auto with heat. I have 240V at the unit, any thoughts?

Matthew: An electric furnace powers the blower using a sequencer that energizes the blower when there is a heat call. It energizes the blower in a cooling call through a different relay. So, it may be that this cooling relay is bad and not closing to bring on the blower. There is something in the furnace or a safety device, like a condensate pump, or a float switch that isn't relaying the voltage in a cooling call. It's not the thermostat.

Customer: Thank you for your help, I think we have moved beyond my ability. You have been very helpful.

Matthew, HVAC Technician
Category: HVAC
Satisfied Customers: 2014
Experience: 14 years experience in the HVAC field of service, installation, Manual J & D calculations
Matthew 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
< Previous | 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:

 
 
 
  • Phil

    Mechanical Engineer

    Satisfied Customers:

    4916
    Retired HVAC/ Electrical & Boiler contractor. Industrial
< Last | Next >
  • http://ww2.justanswer.com/uploads/AL/alumalite/2012-5-10_234018_shutterstock506249951forJA500.64x64.jpg Phil's Avatar

    Phil

    Mechanical Engineer

    Satisfied Customers:

    4916
    Retired HVAC/ Electrical & Boiler contractor. Industrial
  • 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:

    4916
    51 years of experience install design and repair of all makes and models of AC
  • 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:

    2014
    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