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Questions tagged [nest]

The Nest is a programmable, internet-enabled thermostat

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1 vote
2 answers
107 views

Nest thermostat and no C wire at my boiler

so I bought a nest thermostat and it keeps running through the AAA batteries, recommending that I use a C wire, though there's just 2 coming out of the wall (red and white). I got C wire/power adapter ...
-1 votes
1 answer
894 views

Using Nest to control water cooled A/C with reverse cycle heat

I would like to use nest to control a "Marine Air Systems Vector" with Mechanical controls. I have an idea using Honeywell relay(s). Please review the wiring diagram attached and provide any ...
0 votes
0 answers
8 views

Wiring for Nest Thermostat No "Auto" fan Hydro-Air

Currently, my thermostat has G, W, Y and R wires. I have central AC Unit outside, Propane Furnace and an Air Handler in the attic. (Hydro-air) is what I was told. I tried to install a Nest Thermostat ...
3 votes
5 answers
6k views

Nest Protect Expiration Date

I just bought a set of Nest Protects and after opening the first one I noticed that its manufacture date was almost a year ago and that the expiration date was 10 years from the manufacture date, not ...
0 votes
1 answer
67 views

Connecting Nest thermostat to this power adapter

My question is probably simple for those in the know. I've looked at the manual, and researched and Googled, however I'm still not confident. I tested this and got 24v on the red wire in bottom left ...
1 vote
1 answer
4k views

Adding C-Wire for Nest to Triple Aquastat Relay L8148J

Need some extra eyes and advice on how to add a common wire to our current boiler setup. We have a Triple Aquastat L8148E that has 2 wire that connect to our thermostat. Like many before me, I'm ...
0 votes
1 answer
1k views

How do I add a second Google Nest Thermostat to control a single furnace?

I currently have a Google Nest Thermostat downstairs, and it works fine. I want to add a second thermostat upstairs and then have it 'learn' that I sleep upstairs so it should adjust the temperature ...
2 votes
1 answer
106 views

DUAL Nest Power Connector wiring - separate heat/cool thermostats

My house has separate thermostats for heat and cool, each located in a different part of the house. It's a single-zone forced air system handling both heat and cool. The existing thermostat wiring ...
2 votes
1 answer
3k views

Connecting Common Wire from thermostat to Air Handler

My apartment has a central heating/cooling HVAC system consisting of a gas-fired hot water heater which feeds hot water to a First Co air handler for heating, and a rooftop compressor which feeds ...
-1 votes
1 answer
75 views

Can’t find C Terminal Burnham Series ES2

Try to install Nest thermostat 3rd gen. I have 3 wires coming from the furnace: R, W, and G. I connected them to Nest pretty simple there, but low battery, Wi-Fi not working on a daily basis. There is ...
1 vote
1 answer
46 views

Oil Hydro Air & Heat Pump Efficiency

We recently moved into a 5 bedroom home in central Massachusetts with the following system that was installed in 2006: 3 zone hydro-air heat with Veissman Vitorond 100 boiler and Riello 40-F5 burner. ...
0 votes
0 answers
126 views

Nest Doorbell 2nd generation Interior chime buzzing not ringing

Today I got a nest doorbell 2nd generation and installed it. Doorbell chime is working fine but interior chime ringing is not working it’s buzzing when you press the door bell. Here is the screenshot ...
0 votes
1 answer
1k views

How does a Google Nest power connector work?

I am looking at the installation instructions and they all show that the power connector goes back to the furnace/AC control panelIf this is installed just to make sure the thermostat gets enough ...
0 votes
0 answers
189 views

Adding smart thermostat (nest) to burnham series 2 boiler

I’m trying to add a nest thermostat to my burnham series 2 boiler with two zones. My original thermostat has a red and white wire going to W and R with a jumper from R to RC. See first photo. Where ...
0 votes
0 answers
24 views

Wiring Question When attempting to Replace Honeywell with a Nest Thermostat

I am trying to determine which Nest will work to replace honeywell device. I am a bit confused with the current wires. At the moment I have; G=Green Wire, R=Red Wire, O= Blue Wire, Y=Yellow Wire. It ...
1 vote
1 answer
68 views

Trane XR95 No power (2 volts) to Thermostat

Trane XR95 ~2.2V at Thermostat Woke up this morning to a cold house and a thermostat message saying “no power to the Red wire.” Measured R and C using a multimeter and it reads ~2.2 Volts. Took the ...
-1 votes
1 answer
72 views

HVAC wont turn on heat

I recently installed NEST thermostat and the cooling aspect was Ok, however now when i turn on the heat, the thermostat says its heating however there is still cold air coming thru the vents. After ...
0 votes
0 answers
911 views

Installing Nest Thermostat 3rd Gen with Power Adapter to Honeywell HZ311 Zone Controller

I’m attempting to hook up my Nest 3rd Gen thermostat to my zone controller and everything appeared to be working correctly. However, after turning the system back on and cycling through heat and cold, ...
1 vote
1 answer
2k views

Which terminal should I connect it to for a “C” wire on an american standard AM4A0A30

I'm trying to connect a 3rd gen Nest thermostat. I have a 2 zoned heat and 1 zone AC. The zone with this thermostat has a boiler wired Rw, W1 and HVAC wired Rc, G, Y1. It's summer so I'm only using ...
1 vote
1 answer
4k views

Connect separate Heat / AC systems to a Nest E

I have oil/hydro zoned heat, and a separate AC system. I have Honeywell ProSeries thermostats that have some 16 wire connectors (apparently designed to handle a nuclear power plant or something). I ...
2 votes
2 answers
4k views

Installing Nest From HoneyWell T8575D Condo 8-Wire thermostats

My condo apartment current has the HoneyWell T8575D installed and I want to switch to Nest. But I couldn't find which Nest port should the "Fan Common" line go into. The wiring from the wall ...
5 votes
3 answers
1k views

Heating and Cooling controlled via one thermostat

I currently have two thermostats. 1 for heating and 1 for cooling. The heating one stopped working recently and now that winter is coming, I am interested to combine them into one. Here is what I have ...
3 votes
1 answer
266 views

Google Nest Causes Furnace to Need Reset

After installing a Google Nest, my furnace heats until it reaches the correct temperature, but if it sits, the controller light turns off and I need to turn the breaker off and then back on in order ...
0 votes
1 answer
115 views

Existing doorbell has only A1 and A2 wires -- want to replace with different smart doorbell

I'm replacing the doorbell in the house I just moved into. Currently, there is some Aiphone setup (never heard of this). What I do know is that the current doorbell camera has two wires (A1 and A2) ...
1 vote
1 answer
5k views

How do I wire a/c if furnace wiring compartment has no y terminal? [closed]

I have been trying to figure this out for more than a year. All was running until HVAC company came to replace 2 thermostats with nest and rewired 2 HVAC units (a front of house and a back of house ...
4 votes
1 answer
29k views

Furnace blower motor runs briefly then turns off

I have an Amana AMH80804BN with a Nest thermostat (wires Y,C,Rh,W,G) and a 3 ton AC. I have been having issues with the AC portion the furnace (heat) seems to work fine. The AC will start out the day ...
2 votes
2 answers
14k views

Why is Thermostat Y wire connected to C terminal on furnace?

I have a Nest E thermostat, and like many others have lost wifi and getting low battery because I have no common wire connected. After looking at my old Lennnox 78ugf3-75-1 furnace, I noticed that my ...
1 vote
1 answer
727 views

Nest thermostat tripping breaker

I have had the nest for about 3 years, it's been working fine. Over the past month the breaker that feeds the nest and the furnace has been tripping although the heat hasn't been used for about 4 ...
2 votes
1 answer
532 views

Mechanical doorbells (connected to NEST doorbell) won't stop moving

I have two Nest doorbells that I view through Google Home. Both are connected to mechanical doorbell ringers and both of those ringers are constantly in motion. See the pictures attached. The small ...
0 votes
1 answer
148 views

Re-wire Aprilaire to non-communication/legacy for Nest

I currently have an Aprilaire unit 8840. I know the system is proprietary, but I also believe I can rewire the control box and re-wire it as non-communicating thermostat and use a Nest instead. I've ...
0 votes
1 answer
691 views

Where is the control board in my furnace?

I want to install a Nest thermostat into my home and realized I didn't have a C wire and it was recommended to install a Google Nest power connector. The installation seemed simple so I got one. When ...
2 votes
0 answers
68 views

Thermostat connection and NEST compatibility question

We have this thermostat. It's no longer allowing the temperature to be adjusted. It will control the furnace on/off, it just won't allow the temperature to be adjusted. Date & time are still able ...
3 votes
3 answers
4k views

Nest thermostat causing condenser unit contactor to chatter when NOT calling for cooling

I have dual transformers, separate heating and AC. I've recently installed a nest learning thermostat (3rd gen). This is my wiring. The c wire comes from the the transformer on the AC side (pairs ...
1 vote
1 answer
610 views

Is it possible to wire an electric radiant floor as a heat pump in my Nest thermostat?

I have a standard gas furnace, but recently installed an electric radiant floor in one room. I have a transformer at the electric floor and a regular low voltage thermostat wire to my Nest thermostat. ...
1 vote
1 answer
105 views

How to turn a Nest or Nest-E thermostat to completely off (no power, no battery)?

Is it possible to remove the battery, or otherwise turn a Nest thermostat completely off, for times when there is no power to the furnace? This is to avoid draining the battery in the Nest completely,...
1 vote
0 answers
107 views

How do I go about wiring 3 Nests to a boiler with no C wire

I’ve seen a version of this question in a few places but nothing really fits. I have a boiler and hot water baseboards. It’s a three zone system and I installed 3 Nests but there is not C wire and no ...
0 votes
0 answers
291 views

How do I install a Nest Hello doorbell with no existing wires?

I bought a Nest Hello doorbell and then just realized my existing doorbell is wireless. Also, inside the house, in addition to those wireless chimes plugged on outlet, there is also one relative "...
2 votes
3 answers
2k views

How to add Thermostat C Wire to Furnace TH/TR and Transformer

I am trying to figure out the proper wiring for a C wire for my thermostat. My 24v transformer and the current thermostat wiring at the furnace are shown in the pictures below. Can I wire a thermostat ...
0 votes
2 answers
453 views

What is correct Nest setting when adding my own C-wire? (i.e. without using Nest Power Adapter)

I am adding a Nest (not Nest Thermostat E or Nest Learning Thermostat) to a 2-wire boiler system. Fortunately, the existing thermostat wire has free conductors. So I connected a 3rd wire from the C ...
0 votes
2 answers
462 views

Furnace not working after installing nest thermostat [closed]

I installed nest thermostat without turning off power to furnace. Blower kicks on but not furnace. Is there anything I can do?
0 votes
2 answers
12k views

Nest thermostat installation to furnace and heat pump

We have T874G1196 thermostat by york (can only find honeywell documentation) MB7BM-1200K-B air handler H8HK015H-21 electric heater Thermopump (heating and cooling) We want to connect it to a nest ...
1 vote
1 answer
3k views

How to wire a smart thermostat with dual Transformer system? R , Rc, W , Y , G. No C wire. No Jumper

Is this system considered a Dual Transformer system? According to Nest since there is a R and RC cable it must be a dual transformer. But they were unsure and I don't know what that means! I don't ...
2 votes
0 answers
166 views

Thermostat two-wire: heat-only with R+Rh and O/B

Updated Dec 1, 2022 (Previously I wrongly believed that the boiler is connected to a heat pump, whereas it is actually connected to a temperature sensor installed under the heat pump) I want to ...
2 votes
1 answer
526 views

Help Replacing White Rodgers 1F866-344 Thermostat with Nest

I have a dual zoned Heat Pump system in my house. Each zone is controlled by a White Rodgers 1F866-344 Thermostat. I took a picture of the connections (there are 8 wires in use) and would like to ...
-1 votes
2 answers
1k views

Nest E thermostat on ancient 2-wire Bryant boiler system with 2 zonesq

I have a 2-zone hydronic system running off an ancient Bryant boiler. Power is supplied by a 24V transformer, and each red wire passes through a Taco zone valve before heading off to the appropriate ...
1 vote
2 answers
215 views

Help identify common wire on furnace

I need to install a nest power connector for my furnace (only equipment present) and am trying to identify the c or common wire. Pic of board and transformer (?) below. Thank you Edit: better pics ...
0 votes
0 answers
1k views

Adding New External 24v Transformer to Nest with separate Rh and Rc wires

I have separate heat and cooling systems with wiring to Y, W, G, Rh and Rc (see below). For the external transformer, where do I attach the two wires. C and ?
0 votes
0 answers
64 views

How is this working? There is no W,Y,G wires?

Single stage gas furnace and ac w Honeywell thermostat w no W,Y, nor G. How would this work? I’m trying to convert to nest.
1 vote
0 answers
295 views

Anyone connect the MasterStat Model 110423-2 three lines to Google Nest thermostat?

I have read the poster here: Controlling 110v swamp cooler using Nest thermostat about how to control the swamp cooler using the nest. However, I don't have reputation to post comments to that post ...
1 vote
2 answers
2k views

Replacing doorbell transformer attached to electrical panel

I've been pulling my hair out trying to find my current doorbell transformer in order to upgrade it for a nest doorbell. I believe to have found it attached to my electrical panel after taking the ...

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