Heat Controller Comfort-Aire BHD-301-C

Questions and Answers

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Mrs. Stephanie WilsonAug 15, 2025
What causes noisy operation in Heat Controller Dehumidifier?
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  vangrussellAug 15, 2025
  Noisy operation in your Heat Controller Dehumidifier can stem from several sources: * If the fan is cracked, out of balance, or partially missing, replace it. * Remove any loose foreign material inside the housing. * Carefully adjust the tubing if it's hitting the frame. * Check the motor mount and tighten it if the fan blade is hitting the frame. * If there is internal compressor noise, replace the compressor. * Tighten any loose set screws. * If knocking sounds continue when running or the motor assembly is loose, replace the motor. If the motor hums or the noise appears to be internal while running, replace the motor assembly.
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Sergio HillAug 19, 2025
What to do if Heat Controller Comfort-Aire BHD-301-C has insufficient dehumidification?
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  Margaret WillisAug 20, 2025
  If your Heat Controller Dehumidifier isn't dehumidifying sufficiently, here's what you can do. If the relative humidity is low, turn the dehumidifier off. Ensure free and unobstructed air circulation by moving the dehumidifier. Clean the evaporator and/or condenser assembly if they are clogged with dust and dirt. Clean the air filter if it's dirty. Check the motor and repair or replace it if it's not operating.
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Margaret StuartAug 25, 2025
Why Heat Controller Comfort-Aire BHD-301-C Dehumidifier water drips?
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  Jordan ColeAug 26, 2025
  If your Heat Controller Dehumidifier is dripping water, ensure the bucket is properly positioned on the hangers of the drain pan. Check the connection and repair it if it's loose. If there's a leak in the bucket, replace it. Before removing the bucket for emptying, turn the unit off. Check the micro switch and float if the bucket overflows.
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Ricky DiazOct 30, 2025
Why Heat Controller Comfort-Aire BHD-301-C does not start?
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  Victoria WalshOct 30, 2025
  Your Heat Controller Dehumidifier might not be starting due to several reasons. First, check the power supply at the outlet and correct it if there's no power. Poor plug contact at the outlet can also be a reason; ensure the plug is properly installed or replace it. If the bucket is full and the Auto Shut Off light is on, empty the bucket and replace it correctly. Also, make sure the humidity control is not at the Off position; turn it towards Max. A disconnected or loose wire could be the issue; connect the wire, referring to the wiring diagram for terminal identification, and repair or replace any loose terminals. Lastly, test the capacitor and replace it if it's not within ±10% of the manufacturer's rating or if it's shorted, open, or damaged. Remember to discharge the capacitor before ...
J
Jeffrey RiosNov 4, 2025
What to do if Heat Controller Comfort-Aire BHD-301-C Dehumidifier motor runs but compressor doesn't?
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  sara17Nov 4, 2025
  If the motor runs but the compressor doesn't on your Heat Controller Dehumidifier, there are several things to inspect. First, ensure the voltage is within the range of 103.5V and 126.5V. If it's not, call an electrician. Check the wire connections; if loose, repair or replace the terminal and if the wires are disconnected, refer to wiring diagram for identification, and replace the wires. Also, if wire connections are not according to the wiring diagram, correct the connections. Check the rotary switch for continuity, referring to the wiring diagram for terminal identification, and replace the switch if the circuit is open. The Defrost Control may have shut off the compressor due to frost build-up on the evaporator coil; allow time for defrosting. Check the capacitor and replace it if it'...
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Megan RamosNov 8, 2025
Why Heat Controller Comfort-Aire BHD-301-C Dehumidifier compressor cycles on overload protector?
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  Brian DavisNov 9, 2025
  The compressor in your Heat Controller dehumidifier might be cycling on the overload protector due to several reasons. Check the line voltage to ensure it's between 103.5V and 126.5V; if it's intermittent, provide a new supply. Ensure free and unobstructed air flow around the dehumidifier. Clean any dust or dirt on the Heat Exchange. If the motor is not running, determine the cause and replace if required. Check the electrical circuit for a short circuit or ground and repair it. Allow 2 or 3 minutes for pressure to equalize before starting the compressor. Test the capacitor. Check the terminals and repair or replace if loose. Check the refrigeration system for a restriction. Check the compressor and replace it if stuck. Check the OLP, if externally mounted, and replace if open. If the comp...

Summary

Preface

Safety Precautions

Essential safety guidelines to follow before servicing the dehumidifier.

Features and Dimensions

Lists key features and provides physical dimensions of the unit.

Specifications

Control Types

Mechanical Control Type

Explanation of the mechanical control system for the dehumidifier.

Electronic Control Type

Explanation of the electronic control system for the dehumidifier.

How to Operate Dehumidifier

Dehumidifier Working Principle

Explains the internal working mechanism of the dehumidifier.

Optimal Placement and Basic Operation

Guidance on placement, micro switch, and auto defrost functions.

Humidity Control Settings

Instructions for adjusting humidity using mechanical and electronic controls.

Circuit Diagram

Wiring Diagram

Disassembly Instructions

Mechanical Parts Disassembly

Steps for removing bucket, air filter, front case, rear grille, and cabinet.

Control Parts Disassembly

Steps for removing power cord, sensors, PWB, capacitor, and micro switch.

Solenoid Coil and Control Panel

Steps for removing the solenoid coil and control panel assemblies.

Fan, Motor, Shroud, and Drain Pan

Steps to remove the fan, motor, shroud, and drain pan assembly.

Refrigeration System Components

Steps for removing condenser, evaporator, capillary tube, and compressor.

Replacing Refrigeration System

Procedures for safely replacing components within the refrigeration system.

Troubleshooting Guide

Exploded Views

BHD-301-C Model Exploded View

Visual breakdown of the BHD-301-C model components.

BHD-501-B Model Exploded View

Visual breakdown of the BHD-501-B model components.

BHD-651-C Model Exploded View

Visual breakdown of the BHD-651-C model components.

Replacement Parts List

Parts List - BHD-301-C Model

List of replacement parts and their corresponding part numbers for BHD-301-C.

Parts List - BHD-501-B Model

List of replacement parts and their corresponding part numbers for BHD-501-B.

Parts List - BHD-651-C Model

List of replacement parts and their corresponding part numbers for BHD-651-C.

Heat Controller Comfort-Aire BHD-301-C Specifications

General

Model	BHD-301-C
Type	Dehumidifier
Moisture Removal Capacity	30 pints per day
Energy Star Rated	Yes
Voltage	115V
Operating Conditions	41°F to 95°F
Refrigerant	R410A