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HVAC Thermostat Not Working After Trying to Replace
Posted On: August 15, 2023
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:
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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See What Our Customers Are Saying:
Aug 26, 2022
This is the second time we have had Twintech to our house. A couple of summers ago they were in for an issue with our air conditioning. This time it was our furnace having an issue. It was shutting off randomly and not coming back on. Greg came right away and took the time to investigate thoroughly and explain what was going with the furnace. Both times I have been thoroughly impressed with their speed, customer service, and quality of work. I HIGHLY recommend Twintech.
Aug 24, 2022
Extremely happy.
So we were in no rush to replace our old units and took the time to do some research and get a number of quotes.
Twintech came in at around the middle of the pack for price but what convinced us to go with them was Bob, the representative that came to our house. Bob was by far the most professional of all the reps that we met with. He took the time to explain everything, what would work best for us and why. He really did seem very knowledgeable and enthusiastic about his stuff.
As promised on the day of install the crew showed up on time and got to work with minimal impact on us
..they were professional, clean, tidy and got the system up and running ahead of schedule...they made a couple of adjustments to the system to optimize it for our house.
The crew left the house clean and tidy.
Bob the rep showed up to check in and give us a few tips ..
It's been a week since install and all is good.
Our overall experience with Twintech has been excellent from start to finish and I wouldn't hesitate to recommend them.
Thank u.
Aug 23, 2022
It was a refreshing experience interacting with the Twintech team. From Bob, the sales consultant, who articulated in layman's terms all the options available and reasons for making any selection. This was done without the prevailing pressure tactics so commonplace today.
Before proceeding Mitch, the technician, at our request conducted a service check on our 30 yr old furnace. His report was positive indicating no urgency to replace it. Again no pressure tactics.
Three days after first meeting with Bob, the installation team of Greg and
Spencer completed the installation within the planned time frame.
A very professional, courteous and transparent team which delivered on their promise. I highly recommend Twintech.
Aug 22, 2022
Initial contact with sales resulted in an immediate response, which led to a timely installation. Both sales and installers were all very professional. I have no hesitation in recommending TWINTECH.
Aug 21, 2022
I had a great experience with TwinTech. The company offered a reasonable quote, and performed a quick and clean installation. The installer Greg was experienced, professional and courteous. He explained the services he performed and gave recommendations on maintain the new furnace.
The salesman Bob was honest
and professional and educated me on how to achieve optimal performance.
All communication from them was quick and they came the following day. I was pleased with the service and would recommend them.
Aug 20, 2022
From quote, to installation, to follow up, Twintech provided excellent service. I would highly recommended their services.
Aug 19, 2022
I had a really great experience with these guys. The salesman Bob was clearly very knowledgeable about everything to do with heating and cooling a home, spent a lot of time with us going over the details of the job, never rushed us and came back after the install to make sure we were happy. The installation crew was excellent, they covered the floors all the way from outside down to the basement furnace room, kept the place clean, got the work done on time and were very friendly. Ive got 15 years in the contracting/ construction industry and these guys are one of the most professional companys Ive dealt with. Great company!
Aug 18, 2022
Had great service and clean-up was good. Was happy with my salesman. They were very friendly and helpful. I needed a new furnace as our was over 20 years old. The furnace and air-conditioner work great and they are very quiet. I am very pleased with the service and product I received.
Aug 17, 2022
Met with Dave for the sales process and he was great about explaining and going over everything to us. The install happened very quickly and the team were super professional and friendly. We are very happy with this company and their services and we definitely recommend them to others. Thankful my sister recommended them to me!
Aug 16, 2022
Reviews for Twintech were good, and they did not disappoint. After an initial visit to discuss the suitable AC unit for replacement, an installation date was available in just a couple of days, and everything was installed without a hitch. Highly recommended
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