Honeywell T8775C1005 Support Question
Honeywell T8775C1005 Support Question
Find answers below for this question about Honeywell T8775C1005 - Digital Round 24V.Need a Honeywell T8775C1005 manual? We have 2 online manuals for this item!
Question posted by kevintjohnson79 on December 26th, 2021
2 Honeywell Thermostats Blanked Out
Last night both my thermostats went out. The screen went out; does show anything as if it's off. I checked my circuit breaker & I lost no power. I have baseboard heat. The furnace is working properly but I'm unsure what to do...
Current Answers
Answer #1: Posted by SonuKumar on December 27th, 2021 8:26 AM
SonuKumar
Member since:
May 9th, 2021 Points: 16,622,280
Member since:
May 9th, 2021 Points: 16,622,280
Why did my Honeywell thermostat go black?
If you own a Honeywell thermostat, the blank screen could be an indication of a furnace door that wasn't completely closed. These thermostats are programmed to shut off entirely if a furnace door is open. To rule this out, double-check to make sure your furnace door is fully closed.
https://homeguides.sfgate.com/reasons-blank-screen-honeywell-thermostat-87369.html
Please respond to my effort to provide you with the best possible solution by using the "Acceptable Solution" and/or the "Helpful" buttons when the answer has proven to be helpful.
Regards,
Sonu
Your search handyman for all e-support needs!!
Related Honeywell T8775C1005 Manual Pages
Owner's Manual - Page 1
Registered Trademark Patents Pending © 2004 Honeywell International Inc. All Rights Reserved
69-1679EF-1 T8775A,C The Digital Round™ Non-Programmable Thermostats
OWNER'S GUIDE
® U.S.
Owner's Manual - Page 2
T8775 Thermostat (features and operation).
69-1679EF-1
2 (T8775C ONLY) SELECTS COOL/OFF/HEAT
(T8775C ONLY) SELECTS ON/AUTO
ROOM
SHOWS THAT THE
SET
CURRENT ROOM
TEMPERATURE
IS DISPLAYED. DISPLAYS AND ADJUSTS
TEMPERATURE SETTING/TURNS
BACKLIGHT ON
M19470
Fig. 1. DISPLAYS ROOM OR SET TEMPERATURE
SHOWS THAT THE CURRENT TEMPERATURE SETTING IS DISPLAYED.
Owner's Manual - Page 3
....
Setting SYSTEM and FAN Switches (T8775C only)
❑ System and Fan settings are off. ❑ Cool: The thermostat controls your cooling system.
SET THE SYSTEM SWITCH: ❑ Heat: The thermostat controls your heating system. ❑ Off: Both heating and cooling systems are controlled by using SYSTEM and FAN switches located on the top of the...
Owner's Manual - Page 4
...
M19490
69-1679EF-1
4
Display Temperature Setting
NOTE: Your temperature setting can be set anywhere from
40°F to 90°F (4°C to 32°C) in heating and 45°F to 99°F
(7°C to 37°C) in Fig. 1. If a change to the temperature setting is not made within five seconds, the...
Owner's Manual - Page 5
...-1679EF-1 Do not operate cooling when outside temperature is set to remain off for five minutes before restarting.
Heating or cooling does not come on.
❑ Make sure that the SYSTEM switch on the thermostat is below 50°F (10°C). Can cause permanent damage to compressor or other equipment.
See equipment...
Owner's Manual - Page 6
... delay.
❑ Check the system fuse or circuit breaker and replace or reset if necessary.
❑ Check for five minutes, or if a power interruption occurs while the compressor is present in the display.
❑ In cooling, make sure the temperature setting is below the room temperature and a solid snowflake is running, the thermostat will flash during...
Owner's Manual - Page 8
Rev. 6-04 Printed in Mexico
www.honeywell.com/yourhome Automation and Control Solutions
Honeywell International Inc.
Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North
35 Dynamic Drive
Golden Valley, MN 55422
Scarborough, Ontario
M1V 4Z9
69-1679EF-1 J.S.
Installation Instructions - Page 1
...
corners. - Registered Trademark • Patents Pending © 2004 Honeywell International Inc. T8775A,C
The Digital Round™ Non-Programmable Thermostats
The T8775A,C Thermostats provide single-stage temperature control for 24V systems. The T8775A,C models include a thermostat, wallplate (for instructions regarding recycling and the proper disposal of an old control containing mercury in...
Installation Instructions - Page 2
... THE DIGITAL ROUND™ NON-PROGRAMMABLE THERMOSTATS
Wiring
IMPORTANT Use 18-gauge wire to Fig. 2 through 6 for typical wiring hookups. Refer to wire the T8775A,C Thermostats. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2 REMOVE FACTORY INSTALLED JUMPER BETWEEN R AND RC.
Typical hookup of T8775C in single-stage heat pump system.
Disconnect the power supply...
Installation Instructions - Page 3
... 2.
PRESS UPPER EDGE OF CASE TO LATCH
ON 123
DIP SWITCH
M19567
Fig. 8. T8775A,C THE DIGITAL ROUND™ NON-PROGRAMMABLE THERMOSTATS
CUSTOMIZE THERMOSTAT
Setting Fuel Switch (T8775C only)
The fuel switch is preset at the top of the thermostat. The E setting allows the fan to set the heat cycle rate.
See Fig. 8. Temperature Indication.
See Table 1.
Installation Instructions - Page 4
...Automation and Control Solutions
Honeywell International Inc. Honeywell Limited-Honeywell Limitée
1985 Douglas...Heat:
Off: Cool:
The thermostat controls the heating system. Lower the temperature setpoint below the room temperature.
5. The fan should turn off for improved air circulation. T8775A,C THE DIGITAL ROUND™ NON-PROGRAMMABLE THERMOSTATS
(T8775C ONLY) SELECTS COOL/OFF/HEAT...
Similar Questions
Screen Is Blank. What Do I Do?
(Posted by hrbrown80 2 years ago)
When On Cool The Screen Turns Dark
When I put the thermostat on "cool" the screen turns dark. On "heat" it lights up..
When I put the thermostat on "cool" the screen turns dark. On "heat" it lights up..
(Posted by ladycop7y7 5 years ago)
My Programmable Thermostat Is Flashing 'no Signal'. Have Checked The Breakers A
'no signal' - no heat. Checked the breakers = all is well there. New batteries. What is it? Only 2 y...
'no signal' - no heat. Checked the breakers = all is well there. New batteries. What is it? Only 2 y...
(Posted by sissyrotondi 8 years ago)
I Have A Honeywell T8775c1005 Digital Round Non-programmable Thermostat 1h/1c.
The green light with the temp is blinking on and off. It will not let me set a different temp.
The green light with the temp is blinking on and off. It will not let me set a different temp.
(Posted by bettyjomay24 9 years ago)
The Screen Is Blank, Then Flashes In And Out, But The Heat Is Working.
The screen is usually blank but then will flash the temp every once in a while. The heat is working....
The screen is usually blank but then will flash the temp every once in a while. The heat is working....
(Posted by michelleredfearn 11 years ago)