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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
BillyHvac
BillyHvac
Journeyman Service Technician
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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
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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
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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
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Degree, Mech Engr Technology
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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
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6 years college
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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
Appliance Guru
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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
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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
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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
BillyHvac
BillyHvac
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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
Comfort Specialist
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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
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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
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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
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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
Rick
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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
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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
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
13,870 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
BillyHvac
BillyHvac
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13,870 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
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Meet the Experts:

Phil

Phil

Mechanical Engineer

9,951 satisfied customers

Retired HVAC/ Electrical & Boiler contractor. Industrial

Rick Mather

Rick Mather

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Matthew

Matthew

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Brian HVAC Guy

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Kenton Guidry

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Rick Ridley

Rick Ridley

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

Tom

Tom

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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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