HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Connect one-on-one with {0} who will answer your question

Related HVAC Questions
Can the backlight be replaced? It topped working a couple
I checked the settings and it is on Auto which means it should be on from 6 PM to 6 AM.… read more
David Bowden
David Bowden
Owner
1,833 satisfied customers
I have the Totaline FlatStat P374-1100FM and one of the
I have the Totaline FlatStat P374-1100FM and one of the three thermostats in the house has gone totally blank and stopped working. I don't see a battery. Is there a way to reset or check the cause of … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
7,791 satisfied customers
I have a totaline P274. THe 5amp fuse blew in the air
I have a totaline P274. THe 5amp fuse blew in the air handler. I replaced the fuse. When I turn the breaker back on, all of the segments on the display light, then it displays HP (it is a heat pump) t… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
13,970 satisfied customers
I have two Totaline p374-2300LA programmable thermostats in
I have two Totaline p374-2300LA programmable thermostats in our home. One of the displays is out completely, there is nothing on the screen. It is dark. Is there a reboot method to get that display ba… read more
Appliance Guru
Appliance Guru
19,012 satisfied customers
How do I connect a Totaline P374-1800 with humidifier board
How do I connect a Totaline P374-1800 with humidifier board to a Honeywell TrueSteam humidifier?… read more
Douglas
Douglas
Vocational, Technical or Trade Scho
3,087 satisfied customers
I have the Signature P374-1800 model thermostat. Last
hello, i have the Signature P374-1800 model thermostat. Last night the AC was not cooling down the unit, so I went to the electric power box and shut the power off for a minute and turned it back on. … read more
airheatman
airheatman
HVAC Technician
10,173 satisfied customers
re Totaline P374-1800 - No backlight. Used to be there but
re Totaline P374-1800 - No backlight. Used to be there but died after a few months. Is that a UV light? Is it changeable?… read more
airheatman
airheatman
HVAC Technician
10,173 satisfied customers
Have a Totaline FlatStat P374-1100FM Thermostat for the house.
Have a Totaline FlatStat P374-1100FM Thermostat for the house. Actually have 2 of them for two different regions. One has no power to it as nothing appears on the screen. Is there a battery that needs… read more
Theplumber717
Theplumber717
Plumber
Vocational, Technical or Trade Scho
1,264 satisfied customers
Installed a new venstar t1800. display does not work. checked
Installed a new venstar t1800. display does not work. checked power 24v to r and c terminals power is good. any ideas? I did not turn off power when replacing unit.… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
13,970 satisfied customers
I have totaline thermostat P374-1500 programmable and it has
I have totaline thermostat P374-1500 programmable and it has a reversing polarity valve, and every winter and summer I have to change settings on it and it drives me crazy trying to figure it out. I a… read more
warmneighbor
warmneighbor
owner
Vocational, Technical or Trade Scho
162 satisfied customers
My totaline theromstat will not allow me to change when the
My totaline theromstat will not allow me to change when the programmable Fan comes on/off. Every hour, 24 hrs. a day the fan comes on and blows air into our faces while trying to sleep, this lasts abo… read more
Tim H.
Tim H.
Lead building engineer
Vocational, Technical or Trade Scho
3,962 satisfied customers
I have 2 seperate Carrier 8000TS furnaces with their
I have 2 seperate Carrier 8000TS furnaces with their Totaline P374-1800 thermostat. I had a power outage last night and now neither furnace turns on. Yet A/C works on both units. Both furnaces were pr… read more
Tim H.
Tim H.
Lead building engineer
Vocational, Technical or Trade Scho
3,962 satisfied customers
I recently purchased 3focus pro th5000s to replace my old 3
I recently purchased 3focus pro th5000s to replace my old 3 existing auto mag thermostats.... i have 3 wires white, red, and a greenish blue wire, the 1 remaing auto mag is hooked up red wire to R sym… read more
Matthew
Matthew
HVAC Technician
Bachelor's Degree
2,014 satisfied customers
I have 10 Totaline thermostats (P374-1100FM) in my house (for
I have 10 Totaline thermostats (P374-1100FM) in my house (for heat control only). Thermostats have been installed 3 years ago. One of the thermostats outputs W1 high with +2 deg (C) shift (even though… read more
Richard
Richard
District Technical Manager
Vocational, Technical or Trade Scho
1,514 satisfied customers
Hi. Ive got a two-stage burner carrier natural gas furnace.
Hi. I've got a two-stage burner carrier natural gas furnace. It originally was wired with just three wires (red to r, white to w/w1, and green to g). I'm in the market for a new thermostat and am tryi… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
13,970 satisfied customers
I own a Totaline residential programmable thermostat #P374-1800.
I own a Totaline residential programmable thermostat #P374-1800. The unit is less than 3 yrs old. My problem is that the backlit LCD display light does not come on any more; this just started happenin… read more
Matthew
Matthew
HVAC Technician
Bachelor's Degree
2,014 satisfied customers
I have a Lennox HVAC X21 series straight cool (2 stage) a/c
I have a Lennox HVAC X21 series straight cool (2 stage) a/c unit with a cbx32mv air handler. The original Signature Stat thermostat display went out and the service guy replaced it with a Comfortsense… read more
Mark Henley
Mark Henley
HVAC Controls DDC
3,216 satisfied customers
Currently I have a Trane condenser unit with the older Honeywell
Currently I have a Trane condenser unit with the older Honeywell Heat Pump Thermostat, LR69071. The 8 terminals and existing wiring to the thermostat is as follows. * X Off White * L Brown * W2 White … read more
coolman1973
coolman1973
AC/Heat Tech
Vocational, Technical or Trade Scho
162 satisfied customers
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.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future.

JimmyBagley, IA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

Phil

Phil

Mechanical Engineer

7,791 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

2,014 satisfied customers

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

Brian HVAC Guy

Brian HVAC Guy

HVAC Technician

1,024 satisfied customers

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

Kenton Guidry

Kenton Guidry

HVAC Technician

963 satisfied customers

12 years install/service experience.

Rick Ridley

Rick Ridley

UK Heating Engineer

871 satisfied customers

Retired But have had 30 years on the tools, Ex CORGI

Tom

Tom

HVAC Technician

770 satisfied customers

16+yrs HVAC/R service. Residential Commerical Industrial

< Previous | Next >

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.

Show MoreShow Less

Ask Your Question

x