HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

I have a heat pump unit where the entire unit is one

Customer Question
complete piece outside. I am...
I have a heat pump unit where the entire unit is one complete piece outside. I am getting 24v to my R and O from the thermostat which should be telling it to kick on the heat. When I trace back to the contactor I am not getting a 24v signal on the sides of it. I have a brand new thermostat and a new wire from the tstat to the unit
Submitted: 2 years ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 2 minutes by:
2/20/2016
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 2 years ago
BillyHvac
BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 23,040
Experience: Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
Verified

hello,

did you program the thermostat for heat pump?

R is 24v and O is reverse valve...but we still need the compressor to kick on which is Y.

Ask Your Own HVAC Question
Customer reply replied 2 years ago
Ok. So I just checked and I am not getting 24v at Y on my unit. Would this be an issue on the tstat wiring?
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 2 years ago

depends...did you program the thermostat for heat pump operation?

Ask Your Own HVAC Question
Customer reply replied 2 years ago
The tstat is wired as:
R from unit to R on tstat with jumper to Rc
Y1 from unit to Y on tstat
G from unit to G on tstat
W2 and W3 from unit to aux/e on tstat
O from unit to O/B on tstat
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 2 years ago

I understand....but...in the thermostat menu....did you set the thermostat for heat pump? It comes shipped for gas furnace and must be changed..what is thermostat make/model

Ask Your Own HVAC Question
Customer reply replied 2 years ago
Honeywell RTH6350D
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 2 years ago

start at page 13 HERE

function 1 must be set for your heat pump system

Ask Your Own HVAC Question
Customer reply replied 2 years ago
Ok. I had to step away from my house for a little bit. I will try that when I get back. Would my unit be a 5 or a 7 under the function 1 since I have W2 and W3 put together at the unit
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 2 years ago

that will be 5.

also if the outdoor unit is a rheem the changeover valve is B.

If NOT a Rheem or Ruud it is set for O

Ask Your Own HVAC Question
Customer reply replied 2 years ago
Ok. Once I get back to my house and try it I will let you know
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 2 years ago

just respond or rate when ready

Billy

Ask Your Own HVAC Question
Was this answer helpful?
Ask BillyHvac Your Own Question
BillyHvac
BillyHvac
BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 23,040
23,040 Satisfied Customers
Experience: Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics

BillyHvac is online now

A new question is answered every 9 seconds

How JustAnswer works:

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

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.

JimmyBagley, 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!!!!

AlexLos 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.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, 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.

EstherWoodstock, 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.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

Phil

Phil

Mechanical Engineer

6,938 satisfied customers

Retired HVAC/ Electrical & Boiler contractor. Industrial

Rick Mather

Rick Mather

HVAC Technician

3,133 satisfied customers

35 years experience, HVAC

Matthew

Matthew

HVAC Technician

2,014 satisfied customers

14 years experience in the HVAC field of service, installation, Manual J & D calculations

Kenton Guidry

Kenton Guidry

HVAC Technician

963 satisfied customers

12 years install/service experience.

Brian HVAC Guy

Brian HVAC Guy

HVAC Technician

953 satisfied customers

I have been an HVAC/R mechanic/technician for 30+ years.

Rick Ridley

Rick Ridley

UK Heating Engineer

871 satisfied customers

Retired But have had 30 years on the tools, Ex CORGI

Tom

Tom

HVAC Technician

770 satisfied customers

16+yrs HVAC/R service. Residential Commerical Industrial

< Previous | Next >

Related HVAC Questions
Need wiring order for Honeywell thermostat for heat pump.
Need wiring order for Honeywell rth3100c thermostat for heat pump. Wires did not have labels. Thermostat wire has 8 wires.… read more
Mark Henley
Mark Henley
HVAC Controls DDC
3,209 satisfied customers
my Lennox Heater/ac unit model no CB19-41-2p and ECB19-12.5-1p
my Lennox Heater/ac unit model no CB19-41-2p and ECB19-12.5-1p continues to run even though the thermostat is set at 60 degrees. The room temp is over 77 F and yet it continues to run. I have replaced… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
just bought a honeywell rth6350/rth6450 thermostat and it says
just bought a honeywell rth6350/rth6450 thermostat and it says if you have a heat pump with Y1, W1, and W2 wires then stop now and contact a contractor... I do have all three and the problem looks to … read more
Matthew
Matthew
HVAC Technician
Bachelor's Degree
2,014 satisfied customers
Just installed a RTH6360 series programmable thermostat,
Just installed a RTH6360 series programmable thermostat, only getting heat despite setting on cool. … read more
BillyHvac
BillyHvac
Journeyman HVAC Tech
23,040 satisfied customers
I purchase a honeywell wifi thermostat, but I have a heat
I purchase a honeywell wifi thermostat, but I have a heat pump. trying to figure out the wiring. it seems that the W wire now goes to O/B, but not sure where the W2 wire goes. When the new thermostat … read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
Have a Honeywell 8320 thermostat on a heat pump that has
Have a Honeywell 8320 thermostat on a heat pump that has supplemental propane that kicks in below 30. When above 30 thermostat says “wait” and heat comes on periodically but not enough to heat house. … read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
Have Lennox comfort system, about 4 years old with error
Have Lennox comfort system, about 4 years old with error code 434 and also noticed it is continuously using auxiliary heat. … read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,804 satisfied customers
I have a Honeywell th6000 series thermostat and when temps
I have a Honeywell th6000 series thermostat and when temps below 20 degrees the aux pump comes on. The elect bill goes way up. how do I prevent this? … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Just installed RTH6500 WiFi thermostat on heat pump. Set to
Just installed RTH6500 WiFi thermostat on heat pump. Set to Cool with fan on Auto, the heat comes on. … read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,804 satisfied customers
I have a Honeywell TH8320U thermostat. The heat pump does
I have a Honeywell TH8320U thermostat. The heat pump does not respond when I change (raise) the temperature setting. … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I have a Totaline P374-0300 thermostat the wiring is
I have a Totaline P374-0300 thermostat the wiring is W,O,G,R,C,Y I need to know which wire color goes w/ which letter. I have a White, Green, two Reds, Orange and Black wires. … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Need diagram from thermostat to upper connections on gas
Need diagram from thermostat to upper connections on gas furnace , all working in color … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Can a Honewell rth7560e replace a robertshaw 9610 thermostat
can a Honewell rth7560e replace a robertshaw 9610 thermostat controlling a Trane GEVB heat / cool unit. I have tried to replace the thermostat but only the fan works in manual,… read more
Daniel Plourde
Daniel Plourde
plumbing, hvac technichian
Vocational, Technical or Trade School
452 satisfied customers
Carrier Programmable Thermostat to heat pump system has no
Carrier Programmable Thermostat to heat pump system has no display. Switched off and on both related breakers. Nothing. One website suggested jumping together the red and white wires which I did. Syst… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
Need thermostat to heat pump wire connections for honeywell
need thermostat to heat pump wire connections for honeywell rth3100c to a eubanks heat pump r410a series with electric emergency heat. Please. … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I have a Honeyweel Chronotherm III thermostat. The heat pump
I have a Honeyweel Chronotherm III thermostat. The heat pump nor the heat stri[ps come on. The thinking the thermostate maybe the source on my problem, Any suggestions? … read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,804 satisfied customers
Trying to replace an old thermostat controlling heat pump
Trying to replace an old thermostat controlling heat pump that has heat/cool function, with NEST. There are 4 wires, on the old one labeled thusly: … read more
D.E. Anderson
D.E. Anderson
Industrial Refrigeration Service Manager
200 satisfied customers
RTH7600 Thermostat with heat pump. All worked fine. Today AC
RTH7600 Thermostat with heat pump. All worked fine. Today AC inside and outside changed out to non heat pump. AC worked fine for several hours, now heat is coming on instead of AC I reprogramed thermo… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x