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Old Thermostat works fine, Replacing to NEST thermostat,
Old Thermostat works fine, Replacing to NEST thermostat, there's wiring O/B slot while the old thermostat has their own O and B seperate wire. I installed NEST and tried run, but the test show it runn… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
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I'm getting the E105 error on my nest. I was trying to
I was trying to switch the systems from "Cool" to "Heat" … read more
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My air condition stopped working last nite. the thermosate
my air condition stopped working last nite. the thermosate says: WIRING REPORT NO POWER TO RC WIRE DETECTED. PLEASE ADVISE. SHOULD I CALL A REPAIR MAN TO COME FIX THE AIR OR ITS IT THE NEST THERMOSTAT… read more
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Getting a E105 O/B wire error code when attempting to switch from heat to cool mode. The system is electric AC and gas furnace heat. The orange wire from the house is connected to the O/B terminal, so… read more
Appliance Guru
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I have cromotherm 111 older main zone thermostat & also a
I have cromotherm 111 older main zone thermostat & also a HOneywell slave thermost for theopposite side of the house. the main thermostat ha O white wire W/4 White G green R/5 red B blue Y/6 yellow. I… read more
Gaztech
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I"m trying to install a Nest thermostat 3rd generation on my
Hello. I"m trying to install a Nest thermostat 3rd generation on my Trane heat pump/gas furnace system. My thermostat is a Trane BAYSTAT239A. There is a heat pump kit mounted next to my furnace model … read more
Regan Land
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I recently got a NEST and was looking to install it and
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BillyHvac
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I think I may have a bad nest out of the box. They are
I think I may have a bad nest out of the box. They are sending me a new one after going through hours of support. But maybe you guys will know something more. … read more
gotoman for ac
gotoman for ac
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I installed a Honeywell model th62200D. I have a heat pump.
I installed a Honeywell model th62200D. I have a heat pump. I wired the unit as follows: Red wire to R/RC Yellow wire to Y Blue wire to C Orange wire to 0/B Green wire to G White wire to AUX/E The bro… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
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I am trying to install nest. My current thermostat has 2
Hello, I am trying to install nest. My current thermostat has 2 sets of wires. Set one has a White and Red and the second wire has Blue,Red,Yellow,brown and Green. Currently from set one the white goe… read more
Brian HVAC Guy
Brian HVAC Guy
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Wiring : I have a trane xl80 2 stage furnace - I am
I have a trane xl80 2 stage furnace - I am replacing a nest with a honeywell rth2300b … read more
Phil
Phil
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Degree, Mech Engr Technology
8,427 satisfied customers
Phil. My HVAC guy told me that switching to a Nest thermostat was as easy as plugging
Hi Phil. My HVAC guy told me that switching to a Nest thermostat was as easy as plugging in 4 wires. Well it's not so easy. I'm stuck at the dual vs single fuel section. It's thinking I have a heat pu… read more
Tim H.
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I am currently working with a Carrier thermostat model tstatccpdf01-.
I am currently working with a Carrier thermostat model tstatccpdf01-B. I want to switch to a NEST thermostat but I need to know where the S1 and S2 wires go. S1 is Brown and S2 is Black. I have a heat… read more
airheatman
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I have a bryant 912sa with error 24. I installed nest a few
I have a bryant 912sa with error 24. I installed nest a few weeks ago. I think yesterday the ac tried to kick on (first time since nest installed) and I got an e24 nest error. Now nest is dead. So I n… read more
Phil
Phil
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Degree, Mech Engr Technology
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I have a Honeywell Mastertrol Minizone MM-2 control board for
I have a Honeywell Mastertrol Minizone MM-2 control board for my hydro air system. I am trying to figure out the proper wiring setup for my Nest thermostat. It does not have separate orange and blue c… read more
oilburn62
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I am looking to replace my old thermostat with Nest
Hello. I am looking to replace my old thermostat with my new generation 2 Nest. I have 6 wires: R, O, Y, G, B, W1, and X2. My system is a dual stage heating/cooling with auxiliary heat. I'm unsure how… read more
joeydelia
joeydelia
HVAC-R Tech supermarket refrigeration
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NEST Thermostat Battery is not charging. What can I do?
I have exactly the same problem as people on this forum in that the Nest battery is not being charged by the AC. I tried to follow your instructions, but the problem is that I don't have a C or Com la… read more
SWFLHVAC
SWFLHVAC
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Meet the Experts:

Phil

Phil

Mechanical Engineer

8,427 satisfied customers

Retired HVAC/ Electrical & Boiler contractor. Industrial

Rick Mather

Rick Mather

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35 years experience, HVAC

Matthew

Matthew

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Brian HVAC Guy

Brian HVAC Guy

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Kenton Guidry

Kenton Guidry

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Tom

Tom

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A-1 Tech

A-1 Tech

Service Manager

526 satisfied customers

I have been in the HVAC business for over 40 years.

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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.

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