American Standard ACONT402AN32DA User Manual (English)

Questions and Answers:

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Heather LaneAug 20, 2025
Why is my American Standard Thermostat heating not working?
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  Katie BlackburnAug 21, 2025
  If the heating on your American Standard Thermostat will not come on, here's what to check: * Ensure the System Mode is set to Heat and that the setpoint is higher than the current room temperature. * Consider that the minimum off time delay may be in effect. If heating doesn't start within 5 minutes, proceed to check the heating system. * Inspect for loose connections to the control or system, and repair if needed. * It's possible the heating system requires professional service, or the control itself needs replacement.
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Paul RichardsAug 22, 2025
How to calibrate indoor temperature display on American Standard ACONT402AN32DA Thermostat?
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  Erin SmithAug 22, 2025
  If the indoor temperature display on your American Standard Thermostat is incorrect, it likely needs calibration. Calibrate the sensor using User Setup Step 59.
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Kara AndersonAug 25, 2025
How to set American Standard ACONT402AN32DA Thermostat heating above 80 degrees?
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  William GoodwinAug 25, 2025
  If you cannot set the heating setpoint above 80 degrees on your American Standard Thermostat, the deadband between the heating and cooling settings might be set too high. Decrease the Deadband setting using User Setup Step 52.
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Karen BurtonAug 26, 2025
How to fix American Standard ACONT402AN32DA if the display will not come on?
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  emilymillsAug 26, 2025
  If the display on your American Standard Thermostat won't turn on, there are several potential causes: * A blown fuse or tripped circuit breaker. In this case, replace the fuse or reset the breaker. * The furnace power switch is OFF. Turn the switch to ON. * The furnace blower compartment door or panel is loose or not properly installed. Replace the door panel in the proper position to engage the safety interlock or door switch.
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Nichole DuncanAug 28, 2025
What to do if American Standard ACONT402AN32DA temperature setting will not change?
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  Wanda BauerAug 28, 2025
  If your American Standard Thermostat temperature setting will not change, it could be due to a couple of reasons: 1. You might have reached the upper or lower temperature limits. The heating limits are between 40 - 85F, and the cooling limits are between 65 - 90F. Check your temperature setpoints. 2. The keypad might be locked. If "Keypad locked" is displayed on the LCD, unlock the keypad by pressing the Up and Down arrow buttons together until the icon disappears.
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Michael SmithAug 29, 2025
What to do if American Standard Thermostat does not respond to keypad presses?
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  Lauren MartinezAug 29, 2025
  If your American Standard Thermostat is not responding to keypad presses, it could be due to the following reasons: * The keypad is locked. Unlock it by pressing the Up and Down arrow buttons together until the "Keypad locked" message disappears. * There is a keypad failure. In this case, replace the control.
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Steven PughAug 31, 2025
Why does the fan run all the time on my American Standard Thermostat?
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  James CainAug 31, 2025
  If the fan on your American Standard Thermostat runs all the time, here's what might be happening: * The fan mode is set to ON. Change the fan mode to AUTO. * There is a short in the control wiring. Check and repair the wiring.
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Cameron GutierrezSep 2, 2025
Why is my American Standard Thermostat cooling not working?
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  lowewhitneySep 2, 2025
  If the cooling on your American Standard Thermostat will not come on, here's what to check: * Ensure the System Mode is set to Cool and that the setpoint is lower than the current room temperature. * Consider that the minimum off time delay may be in effect. If cooling doesn't start within 15 minutes, contact servicer. * Inspect for loose connections to the control or system, and repair if needed. * It's possible the cooling system requires professional service, or the control itself needs replacement.
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Eric BurchSep 4, 2025
How to fix incorrect outdoor temperature display on American Standard ACONT402AN32DA?
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  Whitney MoralesSep 4, 2025
  If the outdoor temperature display on your American Standard Thermostat is incorrect, you should: 1. Calibrate the sensor using User Setup Step 60. 2. Disconnect the outdoor sensor from the controls terminal block and check the sensor and field wiring resistance value using Table 2.
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Justin CortezSep 5, 2025
What to do if American Standard ACONT402AN32DA Thermostat says 'Cool ON' or 'Heat ON' but there is no air?
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  sabrina43Sep 6, 2025
  If your American Standard Thermostat displays "Cool ON" or "Heat ON" but no warm or cool air is coming from the registers: * The heating equipment might turn on the fan only after the furnace has warmed up to a setpoint. Wait one minute after "Heat ON" is displayed, then check the registers. * The heating or cooling equipment may not be operating. Check the heating and cooling system.