HVAC

Have HVAC Questions? Ask an HVAC Expert for Answers

Ask an Expert,
Get an Answer ASAP!

HVAC
This answer was rated:

Have a carrier rtu. Runs fine for 5 minutes then shuts down

Have a carrier rtu....
Have a carrier rtu. Runs fine for 5 minutes then shuts down cooling. Heat pump with no strip heat. Thermostat is calling for cool. Indoor fan is running.
JA: Did you double-check the thermostat's settings? And what about the filters?
Customer: Filters fine, tstat is calling forcool. Has honeyweii 7220 economizer c ontrol
JA: Do you plan on doing the work yourself?
Customer: Ye s
JA: Anything else we should know to help you best?
Customer: All lps hps sensors jumpered , no chang e. Defrst board loses 24 volts on pin 10.
Show More
Show Less
Ask Your Own HVAC Question
Answered in 3 hours by:
7/21/2017
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 8,826
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial
Verified

Hello. the defrost board has gone bad. If you rate that answer positively I will spend an unlimited amount of time coaching to a complete diagnosis and repair (could also be a bad sensor attached to the defrost board)

Ask Your Own HVAC Question
Customer reply replied 4 months ago
New defrost board, new Honeywell 7220. New vfd fan control.
Daniel Plourde
Daniel Plourde, HVAC Technician
Category: HVAC
Satisfied Customers: 349
Experience: hvac technichian at performance plumbing and heating
Verified

hi i am dan i can help you with this. have you tried bypassing the economizer controls?

Ask Your Own HVAC Question
Customer reply replied 4 months ago
How do I bypass the Honeywell 7220

you can either go into the settings under test run and you can set it to connect Y in to Y out. it will stay like that for 10 minutes or you can just disconnect the Y in and Y out and twist them together

Daniel Plourde
Daniel Plourde, HVAC Technician
Category: HVAC
Satisfied Customers: 349
Experience: hvac technichian at performance plumbing and heating
Verified
Daniel Plourde and 87 other HVAC Specialists are ready to help you
Ask your own question now
Customer reply replied 4 months ago
Y in and out are staying up. On the defrost board P2 pin 5 blue is up. P3 pin 10 drops.
Phone call session started

found the wiring diagram. what you want to look for is a freeze thermostat that will be attached to the indoor coil that is what is tripping the unit off. it may be the switch is faulty or the coil is actually freezing could be the coil is dirty or some other restriction. you said the fire stat tripped, there may also be fire dampers in the duct that have closed and need to be reset. let me know if you have any more questions

Ask Your Own HVAC Question
Customer reply replied 4 months ago
Jumpered out freeze sensors, no difference

ok then i would recommend calling carrier factory tech support 1-***-***-****

Ask Your Own HVAC Question
Customer reply replied 4 months ago
Carrier factory support is sigler down here in southern California

that is a supplier for parts but you can call the tech support line and talk to them and they can walk you through exactly what to check

Ask Your Own HVAC Question
Customer reply replied 4 months ago
They sent me to sigler

ok did you try calling them?

Ask Your Own HVAC Question
Customer reply replied 4 months ago
not very helpful

ok have you checked that it is not the compressor overheating when it shuts off?

Ask Your Own HVAC Question
Customer reply replied 4 months ago
not overheating

ok does the second circuit work or do the same thing?

Ask Your Own HVAC Question
Customer reply replied 4 months ago
How do I pay you for your help.
Monday tech support is going to visit site. I hope it is something really dumb that I have overlooked.

there is nothing else you need to do. good luck with the unit

Ask Your Own HVAC Question
Customer reply replied 4 months ago
Thank you.

.

Ask Your Own HVAC Question
Ask Daniel Plourde Your Own Question
Daniel Plourde
Daniel Plourde
Daniel Plourde, HVAC Technician
Category: HVAC
Satisfied Customers: 349
349 Satisfied Customers
Experience: hvac technichian at performance plumbing and heating

Daniel Plourde 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

8,826 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
I have a Carrier Furnance that is making intermittent
I have a Carrier Furnance that is making intermittent squeaking noises at startup, while running but always just prior to shutting off. I feel the furnace works fine except to this. … read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,090 satisfied customers
I have a Carrier furnace from the 80s. In which the blower
in which the blower won't turn off. but the heat does turn on/off depending on the thermostat control … read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
My Carrier Furnace goes on but will not stay on,the red
My Carrier Furnace goes on but will not stay on,the red blinking code is 3blinks and pause,3 … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I have a Carrier Programmable Thermostat and the AC keeps
I have a Carrier Programmable Thermostat and the AC keeps running. Can I reset it somehow or could there be another problem? … read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
We just had a new carrier package unit installed on the roof
We just had a new carrier package unit installed on the roof of our townhome. Model 50VLC3630TP. The unit remove was a carrier 50GX036301. The new unit works great but there is a very noticeable low f… read more
hvacdave84
hvacdave84
53 satisfied customers
Question for you regarding wiring a carrier infinity with a
Question for you regarding wiring a carrier infinity with a Honeywell lyric. I have a gas furnace and an AC condenser. Today the terminal with the abcd wires connected in the furnace has 2 sets of wir… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I have a Carrier 58MCA080 gas furnace with continuing
I have a Carrier 58MCA080 gas furnace with continuing issues. Need some help diagnosing current problem.… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Trying to identify thermostat wires from an old Carrier
Trying to identify thermostat wires from an old Carrier Comfort Zone to review options for upgrading the thermostat. … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I live in a rental home with a Carrier system Model
I live in a rental home with a Carrier system Model CD5BXA030000AAA, serial #1896X41060. I have A LOT of questions; however, right now, I'd like to know why I am seeing a steady RED light through the … read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
I have carrier c48175d. changed thermostat to honeywell.
i have carrier c48175d. changed thermostat to honeywell. carrier shows green to A yellow to B white to C and red to D. … read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
I just moved into a house and it has the infinity carrier
I just moved into a house and it has the infinity carrier thermostat but no matter how many times I tape on it-it doesn't power up for me to set the temperature … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
We have a Carrier A/C with Carrier TP-PRH01 thermostat. Set
We have a Carrier A/C with Carrier TP-PRH01 thermostat. Set on hold, auto, cooling.75 dgr. A/C will run for a while and go dark.Cooling stops. eventually it will light up and cooling will begin and wi… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
Just bought a Nest, but it's incompatible with my Carrier
Hi Hi. Just bought a Nest, but it's incompatible with my Carrier Infinity system. what to do? Rewire? Or find a different thermostat? If so, which one? … read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
I HAVE A CARRIER HVAC WITH A SYSTXCCUIDO1B THERMOSTAT THATH
I HAVE A CARRIER HVAC WITH A SYSTXCCUIDO1B THERMOSTAT THATH NEEDS TO BE REPLACED. DO YOU RECOMMEMD A ONLINE PART. … read more
Regan Land
Regan Land
General Manager
Vocational, Technical or Trade Scho
508 satisfied customers
Is there a battery on my carrier infinity thermostat? The
Is there a battery on my carrier infinity thermostat? … read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
I have a Carrier TP-PRH01-A programmable thermostat but it
I have a Carrier TP-PRH01-A programmable thermostat but it is not WiFi capable. I would like to replace it with a Honeywell WiFi programmable thermostat. Can you tell me which model(s) you would recom… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
Transformer (90-T40F3) replacement on a Carrier HVAC. 120VAC
Transformer (90-T40F3) replacement on a Carrier HVAC. 120VAC input White to common Black to power (208-240 capped) Secondary 24V blue/yellow. From the units circuit board connection "C" is brown and c… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Trying to see what my options are to replace a carrier
Trying to see what my options are to replace a carrier infinity stat that is out of warranty and not functioning properly. … read more
Phil
Phil
Mechanical Engineer
8,826 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