Bryant Dehumidification Control Ineffective

Thermostat indicates dehumidification is active, but indoor humidity does not decrease.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Dehumidification output from thermostat not wired correctly, Bryant indoor unit not configured for dehumidification mode, Whole-home dehumidifier not powered or failed, Oversized system short cycling and not removing moisture

How to Fix / Troubleshooting

Safety first: Turn off power to indoor unit and any dehumidifier at the breakers before inspecting wiring.

Steps to troubleshoot:

  • 1. Verify configuration: In the installer menu, confirm dehumidification is enabled and correctly set up for either AC-based dehumidification or a dedicated Bryant dehumidifier.
  • 2. Inspect DH wiring: Check the dehumidification (DH) or control terminals between thermostat, indoor unit, and dehumidifier. Tighten loose connections.
  • 3. Confirm dehumidifier operation: If a separate dehumidifier is installed, verify it powers on and drains properly when called.
  • 4. Professional evaluation: If wiring and configuration are correct but humidity remains high, a technician should evaluate system sizing, run times, and dehumidifier capacity.
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Repair Difficulty

Hard 4/5

Required Part

Bryant Whole-Home Dehumidifier
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