Honeywell Home DR90A3000 User Manual (English)

Questions and Answers:

C
Charles WhiteJul 28, 2025
Why is my Honeywell Home DR90A3000 not removing enough water?
- T
  Timothy HowardJul 28, 2025
  If your Honeywell Home Dehumidifier isn't removing as much water as you expect, it could be due to several reasons. The air temperature and/or humidity may have dropped, or the humidity meter may be out of calibration. The unit might be in a defrost cycle, or the air filter could be dirty. Other potential causes include a defective defrost thermostat, low refrigerant charge, air leaks in the cover or ducting, a defective compressor, restrictive ducting, or an open optional Condensate Pump Safety Switch.
M
Michelle DunnAug 3, 2025
Why does the compressor on my Honeywell Home DR90A3000 Dehumidifier cycle on and off too frequently?
- M
  Michael MyersAug 3, 2025
  If the fan runs but the compressor cycles on and off too frequently on your Honeywell Home Dehumidifier, it could be due to several factors. The ambient temperature or humidity might be low, causing the unit to cycle through defrost mode. Other potential causes include a defective compressor overload, a defective compressor, a defective defrost thermostat, dirty air filters restricting airflow, low refrigerant charge causing the defrost control to cycle, or a bad connection in the compressor circuit.
N
natalie70Aug 9, 2025
How to fix Honeywell Home Dehumidifier when it's not providing ventilation?
- D
  donnarileyAug 9, 2025
  If your Honeywell Home Dehumidifier is not providing ventilation, check the control wire connections, including those at the fresh air damper. It could also be due to a defective fresh air damper, or a dirty air intake. Try cleaning the outside intake hood.
A
Andrea WilcoxAug 15, 2025
Why is the evaporator coil frosted on my Honeywell Home Dehumidifier?
- K
  kevin31Aug 15, 2025
  If your Honeywell Home Dehumidifier's evaporator coil is continuously frosted and has low de-humidifying capacity, the defrost thermostat might be loose or defective. It could also be due to a low refrigerant charge, or dirty air filters restricting airflow.
D
Duane DavidsonAug 21, 2025
Why does the fan not run on my Honeywell Home Dehumidifier when ventilation is on?
- J
  jonathangreeneAug 21, 2025
  If the fan on your Honeywell Home Dehumidifier does not run when ventilation is activated, but the compressor runs briefly and cycles on and off with the humidity control turned on, it could be due to a loose connection in the fan circuit. An obstruction might be preventing fan rotation, or the fan itself could be defective. Other potential causes include a defective fan relay or a defective fan capacitor.

Honeywell Home DR90A3000 Specifications

General

Model	DR90A3000
Dehumidification Capacity	90 pints per day
Coverage Area	Up to 4, 500 sq. ft.
Energy Star Rated	Yes
Power Supply	115V, 60 Hz
Continuous Drain Option	Yes
Operating Temperature Range	41°F to 95°F
Humidity Control	Adjustable humidistat
Filter Type	Washable filter

Summary

About the Dehumidifier

Benefits of the Dehumidifier

Key advantages of the DR90A3000/DR120A3000 dehumidifier, including water removal and efficiency.

Maintaining Ideal Humidity Levels

Explains the impact of dew points and relative humidity on comfort and cooling efficiency.

Control Options

T10 Pro Smart Thermostat

Controls heating, cooling, and ventilation with programming and optional lockouts.

Prestige IAQ Thermostat Kit

Manages HVAC functions with a wireless sensor and advanced programming features.

VisionPRO Smart or VisionPRO RedLINK Thermostat

Offers Wi-Fi or RedLINK connectivity for HVAC control and outdoor environment monitoring.

HumidiPRO Digital Control

Provides manual dehumidification control with compressor protection and adjustable range stops.

DG115 IAQ Digital Control

Automates fresh air adjustments and offers advanced ventilation programming.

Manual Dehumidistat and Automatic Ventilation Controls

Features manual humidity control and automatic ventilation for ASHRAE standards.

Installation and Application

Duct Sizing and Flex Duct Use

Guidelines for selecting proper duct size and using flex duct for vibration reduction.

Isolated Areas for Dehumidification

Recommendations for ducting to isolated or stagnant air flow areas for effective dehumidification.

Electrical Requirements for Installation

Specifies the need for a 115 VAC outlet with GFI protection for safe operation.

Dedicated Return to Main Supply Configuration

Details a common installation method using a dedicated return air path.

Main Return to Main Supply Configuration

Describes an installation scenario where the unit connects to the main return air.

Main Return to Main Return Configuration

Illustrates an installation setup for running the dehumidifier with A/C operation.

Dedicated Return to Dedicated Supply Configuration

Explains an installation where the dehumidifier is not ducted to a forced air HVAC system.

Plumbing Installation

Drain Nozzle and Tube Connection

Instructions for attaching the drain nozzle and connecting the drain tube securely.

Drain Hose Routing and Water Trap

Guidance on routing the drain hose downhill and installing a water trap for proper function.

Terminal Description

Low Voltage Hazard Warning

Safety caution regarding low voltage hazards and the need to disconnect power before installation.

Dehumidifier Terminal Block Identification

Identifies the terminals on the dehumidifier's side panel for wiring connections.

Wiring

Wiring Diagram for Prestige Thermostat

Provides the wiring schematic for connecting the dehumidifier with a Prestige thermostat.

Wiring Diagram for HumidiPRO Control

Shows the wiring connections for using the HumidiPRO digital humidity controller.

Wiring Diagram for External Humidity Control

Illustrates wiring for ducted operation with an external humidity control.

Wiring Diagram for External Humidity and Ventilation Control

Details wiring for ducted operation with both external humidity and ventilation controls.

Wiring Diagram for DG115 IAQ Control

Shows wiring connections for the DG115 IAQ control with a powered dehumidistat.

Checkout and Maintenance

Initiating Dehumidifier Checkout

Steps to test the dehumidifier by setting humidity control and checking operation.

Filter Cleaning and Replacement

Procedure for cleaning the unit, removing the filter door, and replacing the filter.

Drain Line Inspection

Checking the drain line for blockages and ensuring secure connections for proper drainage.

Post-Service Actions

Steps to take after service completion, including initiating service calls and resetting reminders.

Technical Description and Troubleshooting

Refrigeration System Overview

Explains how the DR90A3000/DR120A3000 uses a refrigeration system to remove moisture.

Troubleshooting High Pressure Refrigerant Warning

Safety warning about servicing high-pressure systems and high voltage circuitry.

Troubleshooting: No Dehumidification

Common issues and recommended steps when the unit does not dehumidify.

Troubleshooting: Compressor Cycles Frequently

Addresses problems where the compressor cycles on and off too often.

Troubleshooting: Fan Not Running

Solutions for when the fan fails to operate during ventilation calls.

Troubleshooting: Evaporator Coil Frosting

Identifies causes and solutions for continuous evaporator coil frosting.

Troubleshooting: No Ventilation Provided

Steps to resolve issues where the unit is not providing ventilation.

Troubleshooting: Reduced Water Removal

Addresses scenarios where the unit removes less water than expected.

Unit Test to Determine Problem

Procedures for testing the main unit and control panel to diagnose issues.

Parts List

Dehumidifier Unit Parts

Lists the main dehumidifier unit part numbers for DR90A3000/U and DR120A3000.

Accessory Parts List

Details part numbers for motorized ventilation damper, bypass damper, and filter.

5-Year Limited Warranty

Warranty Coverage and Duration

Explains the five-year warranty period and what it covers.

Warranty Claim Process

Instructions on how to return a defective product or contact customer care.

Exclusions and Limitations

Details what the warranty does not cover, such as reinstallation costs and consequential damages.

Honeywell Home DR90A3000 User Manual

Table of Contents