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We attempted to install nest thermostat 3rd generation and
We attempted to install nest thermostat 3rd generation and we have the Honeywell zh311 board. Lights on 311 are out, ac won't work, and nest has bad info on wiring details. Do I need to replace my Zh … read more
Gaztech
Gaztech
HVAC Technician
Vocational, Technical or Trade School
1,511 satisfied customers
I tried replacing my thermostat with a Nest. Once I got it
HI, I tried replacing my thermostat with a Nest. Once I got it hooked up, it showed an E74 error. The power (Rh) wire isn't working. Power isn't detected. I tried to put the old thermostat back, but i… read more
Twa252842
Twa252842
Handyman / Owner Operator
Vocational, Technical or Trade School
368 satisfied customers
I was installing a new Ecobee thermostat and it wont work,
I was installing a new Ecobee thermostat and it wont work, after talking with Echobee tech support they believe I have blown a fuse. I need to locate the fuse but I cant find it … read more
Cliff
Cliff
HVAC Manager
Associate of Applied Science
349 satisfied customers
I installed a a new thermostat and the furnace will not run.
I installed a a new thermostat and the furnace will not run. The thermostat help line thinks a fuse on my Lennox Elite furnace was burned out in the process of installing the thermostat. I cannot see … read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
14,148 satisfied customers
Installing a nest thermostat and didn't have both ac and
Installing a nest thermostat and didn't have both ac and furnace breakers off. Now no power to Rh according to the nest… read more
Cliff
Cliff
HVAC Manager
Associate of Applied Science
349 satisfied customers
I got a new Nest 3rd-generation learning thermostat. I wired
I got a new Nest 3rd-generation learning thermostat. I wired everything and it turns out R wire has no power. Can someone help me fix this? thanks.… read more
Twa252842
Twa252842
Handyman / Owner Operator
Vocational, Technical or Trade School
368 satisfied customers
Trying to install nest however wiring report e 24 now old
Trying to install nest however wiring report e 24 now old thermostat nor best work … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
8,427 satisfied customers
I have 2 - T8411R 1028 (2) thermostats. Yesterday my husband
I have 2 - T8411R 1028 (2) thermostats. Yesterday my husband tried to install a Nest in its place. When he did and it didnt work, he found out, on line, that the Nest I bought is not compatible with t… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
8,427 satisfied customers
I am having a problem with furnace Model # fb4anf 030000
Hello I am having a problem with bryant furnace Model # fb4anf 030000 abaa The other day the circuit breaker blew for my furnace I reset the breaker with a problem the house fan runs even if I turn it… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
14,148 satisfied customers
Billy, I just read your dissrtation about Payne Led Code 24
Hello Billy,I just read your dissrtation about Payne Led Code 24 resolutions. Greatly appreciated.I believe i was the numbskull that blew the purple fuse when trying to install a nest e thermostat.Whi… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
14,148 satisfied customers
Problem: No power to thermostat red Rc line. Background: •
Problem: No power to thermostat red Rc line.Background:• Bryant HVAC worked fine for years. • About 12 months ago, it stopped working. I found one of two 50amp 250VAC fuses had failed (using Radio Sha… read more
Bill
Bill
Service Mgr
121 satisfied customers
I just installed nest thermostat by first turning the power
hi I just installed nest thermostat by first turning the power off at the circuit breaker and turned back the power on after installing the circuit breaker, it is complaining that HVAC power is not de… read more
Appliance Guru
Appliance Guru
21,023 satisfied customers
I was installing a Nest thermostat yesterday, with the A/C
I was installing a Nest thermostat yesterday, with the A/C breaker turned off. When I turned the breaker back on, every thermostat in my house is now registering that I don't have power to the Rc wire… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
8,427 satisfied customers
I attempted to install a NEST learning thermostat, but I'm
I attempted to install a NEST learning thermostat, but I'm afraid I didn't turn off the power before install and now my R wire has no power. … read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
9,529 satisfied customers
I was installing a new Nest Learning thermostat. I received
I was installing a new Nest Learning thermostat. I received an error code that signified that I wasn't receiving any power to the unit. I then went upstairs and realized that my upstairs thermostat is… read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
9,529 satisfied customers
My breaker was tripped to my rooftop unit. Now it won't come
My breaker was tripped to my rooftop unit. Now it won't come back on. Can I temporarily shut off the main power switch to my building, then turn it back on? Would that reset the breaker so I can then … read more
Tim H.
Tim H.
Lead building engineer
Vocational, Technical or Trade Scho
3,962 satisfied customers
Hey Billy, I googled my Nest Problem and I saw that you were
Hey Billy, I googled my Nest Problem and I saw that you were able to fix a similar issue before. I have a Nest that I used in my previous apartment and worked just fine. My AC worked fine in my new pl… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
14,148 satisfied customers
Bryant 340MAV furnace + AC not working. See 2 red quick flashes,
Bryant 340MAV furnace + AC not working. See 2 red quick flashes, then pause, then 4 slow flashes on furnace led light (24 code?). What does this mean? Is this the reason our AC won't work? Thanks for … read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
14,148 satisfied customers
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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

HVAC Technician

3,133 satisfied customers

35 years experience, HVAC

Matthew

Matthew

HVAC Technician

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14 years experience in the HVAC field of service, installation, Manual J & D calculations

Brian HVAC Guy

Brian HVAC Guy

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I have been an HVAC/R mechanic/technician for 30+ years.

Kenton Guidry

Kenton Guidry

HVAC Technician

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Tom

Tom

HVAC Technician

770 satisfied customers

16+yrs HVAC/R service. Residential Commerical Industrial

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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