HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

I have a p374-1800 Totaline thermostat that went blank and…

Customer Question
I have a p374-1800...

I have a p374-1800 Totaline thermostat that went blank and we cannot turn on the heat to ur home

Contractor's Assistant: Did you double-check the thermostat's settings? And what about the filters?

It is blank on the screen, nothing works

Contractor's Assistant: Do you plan on doing the work yourself?

There is no power to the thermostat, so I cannot check settings

Submitted: 8 months ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 6 minutes by:
12/10/2017
HVAC Technician: Phil, Mechanical Engineer replied 8 months ago
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 9,822
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial
Verified

Hello, there is a lot we can do,

First look for a blown automotive type 3 amp fuse on the printed circuit board mounted on the blower of the furnace/air handler... tell me if its blown or not.

.

Take a close up, exceedingly well focused photo of the wiring diagram glued inside the furnace/air handler door, and a photo that shows the entire printed circuit and I will mark it up with trouble shooting instructions. **and a way to get the heat going manually if possible. Use the 'add files' link next to your send button to get the photo(s) to me.

We can go from there with training, coaching and diagnosis.... without a time limit, In depth with as much detail as needed.

My goal is to give you the best experience possible! I hope I have earned a 5 star rating! Please remember to rate my service by selecting the 5 stars at the top of the screen before you leave today. If you need more assistance, please use the reply box and let me know.

.

Ask Your Own HVAC Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a hvac technicianLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Phil Your Own Question
Phil
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 9,822
9,822 Satisfied Customers
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial

Phil is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

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

9,822 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 >

Related HVAC Questions
Had a power outage and the Totaline P374-1800 thermostat
Had a power outage and the Totaline P374-1800 thermostat blank. Have checked A/C breaker. Was in on position, threw it off and back on - still blank thermostat. Removed face of thermostat - no batteri… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Question about my totaling signature P374 1800. The screen
Question about my totaling signature P374 1800. The screen is completely blank. No combination of pushing buttons or trying to make it come to life works. It's about 10 or 11 years old. Thoughts? … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I have a totaline signature P374-1800 ac/heat control device
I have a totaline signature P374-1800 ac/heat control device (actually have three total devices) and the backlit is out. The a/c control is fine but the device is in a dark hallway spot and I need a f… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 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
9,822 satisfied customers
I came home from being away week to find my thermostat
I came home from being away for two week to find my thermostat dead. I have a Totaline P … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
My thermostat has blank screen while the AC is running. Then
my thermostat has blank screen while the AC is running. Then the AC won't stop running. It's a totaline p374-1000… read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 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
Heating & Air Conditioning Contractor
6 years college
1,836 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
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I have a Totaline P374-1700 thermostat that loses power intermitently
I have a Totaline P374-1700 thermostat that loses power intermitently (display is blank and clock looses time). The furnace/AC works fine. The only problem seems to be the clock losing time, i.e. prog… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
How to get an owners manual for totaline P 0441 thermostat
How to get an owners manual for totaline P 0441 thermostat. I have been on line looking at every totaline site and manual site and nothing is adequate.… read more
Wvfan79
Wvfan79
Mecanical Designer & Estimator
High School or GED
775 satisfied customers
My Totaline P374 - 0300 thermostat has a blank screen. I took
My Totaline P374 - 0300 thermostat has a blank screen. I took the front off and went upstairs to the other P374 and switched the fronts. It works fine on the upstairs unit. I switched the downstairs w… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
my totaline p374-1000 thermostat has a blank screen. I did
my totaline p374-1000 thermostat has a blank screen. I did the reset by holding the mode and fan for 7 seconds and then just the fan for 2 seconds and then mode and mode. However it did not work. I ch… read more
Matthew
Matthew
HVAC Technician
Bachelor's Degree
2,014 satisfied customers
I have a waterfurnace premier 2 gshp hvac system and am replacing
I have a waterfurnace premier 2 gshp hvac system and am replacing the thermostats with carrier totaline p374-1500 units. I wired according to diagram but now the unit will only run full cold. Even whe… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
Where Can I get installation instructions for a TOTALINE programmable
Where Can I get installation instructions for a TOTALINE programmable thermostat P374-1100 EZ? Is there a battery inside? The display screen is blank.… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I purchased a TH5000 series recently and am annoyed by the
I purchased a TH5000 series recently and am annoyed by the clicking during on/off. Do you have any similar models that I could replace it with which do not click???… read more
Regan Land
Regan Land
General Manager
Vocational, Technical or Trade Scho
508 satisfied customers
I have two independant A/C Heating systems controlled by Totaline
I have two independant A/C Heating systems controlled by Totaline P374-1000FM thermostats. The down stairs thermostat display went blank and was non-operational. I swapped the units and the discrepanc… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
I have 2 totaline PV110 (PN P374-1100)stats in my home.Our
I have 2 totaline PV110 (PN P374-1100)stats in my home.Our power went off last night for 8 hours (AZ it was not too bad) and when it was restored one of the stats display was blank and fan was running… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 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.

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