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 Comfort Specialist Your Own Question

Comfort Specialist
Comfort Specialist, Designer, Estimator & Technician
Category: HVAC
Satisfied Customers: 1253
Experience:  Master HVAC & Gas, Air Balance, LG Master Commissioner, University of North Carolina Certificate holder for Industrial Ventilation Design.
Type Your HVAC Question Here...
Comfort Specialist is online now
A new question is answered every 9 seconds

I have a 3amp in line fuse on the in side of my air heat pump

Resolved Question:

I have a 3amp in line fuse on the in side of my air heat pump Mod. GQ3RC-030K that blows when I turn on the heat. It goes from the field terminal to the transformer.
I put a new honeywell RTHL2510/RTHL2410 series. I hoked the wires the same way the old one was wired.
What would cause that?
Submitted: 9 months ago.
Category: HVAC
Expert:  Comfort Specialist replied 9 months ago.

Wvfan79 :

Hello there! I'm Norman but you can call me Norm. Let's see what I can do to get you some answers today. I'm ready to get started whenever you are.

Wvfan79 :

Hope you are doing well today.

Wvfan79 :

Was your old thermostat a RTHL2510/RTHL2410 as well or a different model?

Customer:

No but was a honeywell

Wvfan79 :

Ok, what color wires went to what terminals on the old thermostat? Do you stil lhav ethat?

Customer:

R red

Customer:

Y yeiiow

Customer:

G green W white

Wvfan79 :

And you didn't have a C wire before?

Customer:

B blue I think that is it

Wvfan79 :

I think that's what the problem. Pull the B loose and cap it. Then replace the fuse.

Customer:

I don't think so

Wvfan79 :

I'm sorry?

Customer:

Ok I'll try it

Wvfan79 :

Your old thermostat required a B (common). It's probably an older Trane unit. On this thermostat B is not for the common wire. It's for energizing a reversing valve in heating which you don't have. Therefore when your thermostat calls for heat it's directly shorting the common to the hot on the W terminal and blowing the fuse.

Customer:

So far it didn't blow the fuse but it takes a few min. for the thurmstat to kick in

Wvfan79 :

I'll be right here to help. Let me know how it's going.

Customer:

It seems to work and I can smell the heat coils heating up

Wvfan79 :

Nice.

Wvfan79 :

This is a common mistake when changing thermostats.

Customer:

I guess that is it thanks

Wvfan79 :

Can't blame you. You see B and think, okay needs to go to B on the new one.

Wvfan79 :

I'll hold tight here for another minute if you'd like?

Customer:

OK Color codes I think I'm old school on them BK black BRN brown B blue

Wvfan79 :

LOL, it happens.

Wvfan79 :

Please do not hesitate to reply if you have questions or comments. Should and when you find the information you require, and are satisfied with my assistance please remember to rate your experience so that I am credited with providing you outstanding customer service. Ratings lower than 3 are negative. I'm very glad I could help you! If you ever need help in the future please bookmark my personal link and visit me again. I'd be glad to help.http://www.justanswer.com/home-improvement/expert-its-norm/.

Customer:

I put a thermometer on the reg. and it it at 80 so it works

Wvfan79 :

Very good!

Customer:

Thank you

Wvfan79 :

You are very welcome!

Customer:

I guess rate you and go

Wvfan79 :

Unless you have other questions about this request. If not, a positive ratting would be appreciated before closing the window.

Customer:

Excellent Rate

Wvfan79 :

There should be a button below that you can use for the rating. Thanks so much.

Customer:

By

Wvfan79 :

Goodbye

Comfort Specialist, Designer, Estimator & Technician
Category: HVAC
Satisfied Customers: 1253
Experience: Master HVAC & Gas, Air Balance, LG Master Commissioner, University of North Carolina Certificate holder for Industrial Ventilation Design.
Comfort Specialist and 3 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:

    4657
    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:

    4657
    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:

    3888
    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:

    3132
    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:

    1994
    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:

    962
    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