32651
26
Zoom out
Zoom in
Previous page
1/30
Next page
TROUBLESHOOTING GUIDE
IF… THEN…
Display will not come on. Check that heat or cool system power is on. You need 24V from R to C
terminals.
Make sure thermostat is correctly mounted on subbase.
Display flashes during programming. You have reached the temperature setting limit. The setting range is
45° F to 88° F.
Display flashes during operation. Programming has been lost because of a power outage. You must
reprogram.
Program is lost due to power Check that backup batteries are installed correctly. Replace if necessary.
outage. Reprogram the thermostat.
Colon in display does not flash. Check for 24V from R to C terminals on the subbase.
Make sure thermostat is mounted correctly on the subbase.
Temperature change occurs Check for on display screen. If is present, check your external
at the wrong times. system for the command that is bypassing the thermostat program.
Check the program times for the period in question. Be sure that AM and
PM indications are correct. Make sure the current day and time are
correct. Reprogram if necessary.
Remember that with Adaptive Intelligent Recovery the heating or
cooling system comes on
before
the WAKE and RETURN start times
so the house will be at the desired temperature when the period starts.
Check if T8631A is set for Conventional Recovery ( visible on display)
or Adaptive Intelligent Recovery.
Heating will not come on. Check the fuse or circuit breaker and replace or reset if necessary.
Check that switch on thermostat is set to HEAT.
T8631R has a built-in time delay which can add to time delays in the
heating equipment. Allow up to 10 minutes after changing the setting
before the compressor starts.
If temperature setting is higher than current temperature, and display
says HEAT ON or SYSTEM light is on, contact your heating and air
conditioning contractor.
Cooling will not come on. Check the fuse or circuit breaker and replace or reset if necessary.
Check that switch on thermostat is set to COOL.
The thermostat has a built-in time delay, which can add to time delays in
the cooling equipment. Allow up to 10 minutes after changing the setting
before the compressor starts.
If temperature setting is lower than current temperature, and display says
COOL ON or SYSTEM light is on, contact your heating and air
conditioning contractor.
The building is too warm or too cool. Press PRESENT SETTING to check the current temperature setting.
If desired, change the time or temperature setting. See page 21.
Check for on display screen. If is present, check your external
system for the command that is bypassing the thermostat program.
Display says HEAT ON or system Allow time for the heating equipment to heat up before
light is on, but no heat is coming checking for heat at the register.
from the registers.
Display flashes REPL BAT or Install fresh AAA alkaline batteries. See page 23.
goes blank when power is turned off.
45
46
26


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Honeywell T8631A at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Honeywell T8631A in the language / languages: English as an attachment in your email.

The manual is 0,65 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info