Honeywell TB3 Series - User Manual

Questions and Answers

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Sarah JacksonAug 7, 2025
How to unlock the keypad on my Honeywell TB3?
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  gatesbrianAug 7, 2025
  If the keypad on your Honeywell Thermostat is not responding, it might be because the key lock is activated. To remove the key lock, press and hold the specified keys together for a few seconds.
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Kristi GarciaAug 14, 2025
What to do if my Honeywell Thermostat is not cooling?
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  lindahayesAug 14, 2025
  If your Honeywell Thermostat isn't cooling, even with the correct set point, the cooling mode might not be active. Use the key to set the mode to Cooling. Ensure the set point is lower than the room temperature and that the Cooling Valve icon is displayed. After making these adjustments, wait to see if the system starts cooling.
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clayrebeccaAug 22, 2025
Why is my Honeywell TB3 Thermostat not heating properly?
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  Mary SmithAug 22, 2025
  If your Honeywell Thermostat is not heating despite the correct set point, the heating mode may not be activated. Use the key to set the mode to Heating. Check that the set point is higher than the room temperature and that the Heating Valve icon is displayed. Give the system some time to start heating after these adjustments.
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Sarah TaylorAug 30, 2025
What to do if I forgot my Honeywell TB3 Thermostat password?
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  Jose JohnsonAug 30, 2025
  To recover a forgotten password on your Honeywell Thermostat: Contact your system administrator to get the Parameter Menu Password from the communication line. Alternatively, press the specified keys, then press and hold other specified keys together to perform a factory reset.