$49 / month O.A.C Including Install
$49 / month O.A.C Including Install

HVAC Thermostat Not Working After Trying to Replace

24 / 7 Emergency Service Available. Call Us Now: 1.844.894.6832


[BACK]
HVAC Thermostat Not Working After Trying to Replace

Posted On: August 15, 2023

HVAC Thermostat Not Working After Trying to Replace

Today I tried to replace my existing thermostat with a Nest Learning Thermostat.


My old thermostat is a Bryant thermostat and Bryant HVAC unit.


The thermostat has Y G C W and Rh with a jumper to Rc.


Connected the Nest as suggested and got this error message.


Google tech support wasn't able to help and now after trying to reconnect my old thermostat to have AC running, that won't work now either.


The thermostat won't turn on at all (without batteries) but it turns on with batteries but won't turn on the compressor.


Any suggestions? I have two units (upstairs and downstairs) - it is the downstairs unit that is affected.


We have a crawl space and I can't tell anything obviously wrong (like drain pan etc).


Question from user me4help at hvacadvice at reddit.


Answer:


It sounds like you're experiencing some technical issues with the installation of your Nest Learning Thermostat and the functionality of your HVAC system. Here are a few troubleshooting steps you can take to try to resolve the issues:


  1. Check Wiring Connections: Double-check the wiring connections on both the Nest thermostat and the HVAC unit. Make sure that each wire is properly connected to the corresponding terminal on both ends. Ensure that there are no loose connections or exposed wires.


  2. Check Compatibility: While Nest thermostats are compatible with many HVAC systems, there can be exceptions. Verify that your Bryant HVAC system is compatible with the Nest Learning Thermostat. You can refer to the Nest website or consult the Nest compatibility guide to confirm compatibility.


  3. Check Fuse and Circuit Breaker: If the old thermostat is not working with the HVAC system after attempting to reconnect it, there might be an issue with the power supply. Check the fuse and circuit breaker associated with your HVAC system to make sure they haven't tripped.


  4. Check Battery Contacts: Since you mentioned that the old thermostat is turning on with batteries but won't control the compressor, it's possible that the battery contacts are not making proper contact. Make sure the battery contacts are clean and secure.


  5. Check Compatibility with Dual Systems: If you have two HVAC units for upstairs and downstairs, ensure that the Nest thermostat is compatible with dual-zone systems. Some thermostats require additional wiring or configurations for multi-zone systems.


  6. Nest Wiring Configuration: Verify that you have configured the Nest thermostat correctly based on your HVAC system's wiring. The Nest app or manual should provide guidance on how to set up the thermostat for your specific wiring configuration.


  7. Consult HVAC Professional: If you've tried these troubleshooting steps and are still experiencing issues, it might be a good idea to consult a professional HVAC technician. They can diagnose the issue more accurately and help you resolve any compatibility or wiring problems.


  8. Factory Reset Nest Thermostat: If you want to return to the original configuration, you can perform a factory reset on the Nest thermostat. Refer to the Nest's official documentation on how to perform a reset.


Remember that working with HVAC systems involves electrical components, and if you're not comfortable or experienced with these systems, it's best to seek professional help to prevent any further complications or safety hazards.


Answer from user Downtown-Fix6177 at hvacadvice at reddit.



[BACK]

See What Our Customers Are Saying:

by Anna Chin, Ajax on Twintech Heating and Cooling

On one of the coldest days of winter, our furnace stopped working. Our regular furnace company came and told us we had a CO2 leak and shut us off. Their quote for a new furnace was way too high and they couldn't even install it on the same day. TwinTech was recommended to us by a friend. We called and spoke to Dave who was very nice and knowledgeable. Grant showed up a short time later and a new furnace was installed the same day with no troubles at all. Best of all, we received a higher-end furnace than what was offered by our previous company and at a cheaper price. I would recommend TwinTech with no hesitation at all.

by Hiba, Pickering on Twintech Heating and Cooling

I installed a new furnace and Air conditioner with them. The installation is of high quality and according to standards. The guys are professional and reasonably priced.. I highly recommend them.

by Robert, Pickering on Twintech Heating and Cooling

Had new furnace installed and ran into some difficulties but the contractor responded in a timely and efficient manner - after further service calls were made, a reasonable resolution was found.

by Brian Burns, Whitby on Twintech Heating and Cooling

The work was done quickly efficiently neatly and professionally. Pleased with the service, information, product, and the company.

by Geoff, Port Perry on Twintech Heating and Cooling

Great sales member named Dave came in told us some amazing items and how they would be priced installed an all. We couldn’t believe it! The next day the ac was installed, that day one employee named Greg told us that our furnace was working way to hard and was causing us to use way too much gas. So two days later they came in an installed a new furnace!

by MB, Ajax on Twintech Heating and Cooling

Installation was done quickly and professionally. The new furnace is quiet and provides even heat.

by Richard from Oshawa on Twintech Heating and Cooling

They removed and discarded old furnace. Installed new furnace. Installed air intake pipe, that had never been installed by builder, no charge. Replaced loose hose on floor with hard pipe and rerouted it to drain, no charge. Almost 33% cheaper then quote from Enercare, which was the company we dealt with and had insurance with for 8 years. No yearly fee for cleaning/insurance, saves 300 a year. Courteous, professional, fast, and friendly. My wife and I have been recommending them to everyone we know and meet, and will continue to do so. Thanks for everything, Twintech!!!

by Darcy from Pickering on Twintech Heating and Cooling

This company was great to deal with. Our furnace went down and they installed a new furnace the next day with a lot of professionalism!

by gillian hooton from Uxbridge on Twintech Heating and Cooling

Finally! An honest company with highly knowledgeable and informative staff. Had a furnace service and found multiply errors in our system from an amateur installer. Very fair price to correct problems and will definitely use again.

by dflynn in Ajax on Twintech Heating and Cooling

Had to replace the heating & a/c unit in a condo apartment dwelling. this company recommended by the property manager and president of the condo building. found their workmanship and attention to details very good and very thorough. were able to resolve small problems and situations and happy to feel the heat in my unit. it's pricey, but happy was done by a very professional service. thank you.

Related Links:
oshawa gas furnace problems, ac service call, pickering hvac prices, local ac services, ajax furnace inspection, ac repair services, whitby furnace replacement, furnace repairs pickering, oshawa hvac furnaces, central ac service, ac unit maintenance, pickering gas furnace problems, ac installation near me, ajax hvac repair, hvac repairs, ac contractors, ac repair and service, whitby furnaces, residential furnace, residential ac repair, pickering hvac furnace, pickering furnace service, pickering furnaces, oshawa furnace inspection, oshawa furnaces, nearby ac repair,


See What Our Customers Are Saying:

by Aaron on Twintech Heating and Cooling

We are very happy to recommend this company to everyone. Our furnace broke down on Sunday morning. We phoned them and before noon Grant the owner showed up. He worked on the furnace for about a hour not wanting to give up to fix the problem. The furnace was 17 years old. I was the one talking about replacing it. End result was the next day it was all done. On the Sunday Bob came over with heaters to warm up the house. We decided to replace the water heater at the same time. Thanks Grant for the excellent work. Thumbs up.

by Linda on Twintech Heating and Cooling

Right on time. Explained how to work the HRV in a different way so the house would not be so dry. Changed my whole house water filter for me as well. Friendly, helpful, caring service!

by Robert Rogers on Twintech Heating and Cooling

Very pleased with the professional service that TwinTech Heating and Cooling provided in replacing my furnace. I got several quotes from different service providers. Their price was excellent and they explained the features very well. We are very glad we went with TwinTech and highly recommend their services.

by Robert Mizuno on Twintech Heating and Cooling

We were new homeowners in need of a second opinion. TwinTech Heating & Cooling were Amazing and professional. Very knowledgeable and great service all around. Recommend to anyone looking for honest and reliable services. Treated with respect and care. Thank you Greg, Mitch and Bob!

by Ruth on Twintech Heating and Cooling

TwinTech is an excellent and honest company! I called them for a second opinion after being told by another company that I needed to replace my furnace. Turns out this was not the case at all! I did not need a new furnace. TwinTech did not push to make an unnecessary sale and saved me from a huge expense. Bob and Mitch were extremely professional and above all honest! I definitely recommend TwinTech!

Keeping Your Furnace Unit in Top Condition

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - November 6, 2024

Maintaining your furnace is essential to ensure it works efficiently, prolong its lifespan, and keep your home safe and warm throughout the colder months. Here are some key tips for keeping your furnace in top condition: 1. Regular Filter Replacem

Read More

The Dangers of a Leaking Furnace

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - January 28, 2025

A leaking furnace can pose significant risks to your home and family. Here's a detailed look at the dangers, causes, and solutions to protect your household: 1. Dangers of a Leaking Furnace a. Carbon Monoxide Poisoning A leaking furnac

Read More

Why Choose an Amana Heat Pump for Quiet Comfort?

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - July 8, 2025

When it comes to heating and cooling your home, comfort is key — and that means more than just temperature control. Noise levels can significantly affect your indoor environment, making a quiet heat pump an essential choice for many homeowne

Read More

When Should I Shut Off my AC?

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - March 16, 2024

There are several circumstances under which you might consider shutting off your air conditioning (AC) system: Energy conservation: If you're concerned about energy consumption or want to reduce your utility bills, shutting off the AC wh

Read More