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    Home » Honeywell MO08CESWS6 Portable Air Conditioner User Manual
    Honeywell

    Honeywell MO08CESWS6 Portable Air Conditioner User Manual

    Gabriel SmithBy Gabriel SmithSeptember 10, 2025Updated:October 2, 2025No Comments12 Mins Read
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    Honeywell MO08CESWS6 Portable Air ConditionerHoneywell-MO08CESWS6-Portable-Air-Conditioner-product

    READ AND SAVE THESE INSTRUCTIONS

    WARNING:

    • DO NOT operate the unit with a damaged plug or loose wall outlet. If the supply cord is damaged, it must be replaced by the manufacturer, its service agent, or similarly qualified persons in order to avoid a hazard.
    • DO NOT cover the air intake and exhaust when in use.
    • DO NOT place objects on or sit on the unit.
    • Always turn off and unplug the unit when cleaning or servicing.
    • DO NOT use the appliance if it is damaged.
    • If service is needed, contact an authorized service agent.
    • Unplug the unit when stored or not in use.
    • DO NOT pull or carry the appliance by the power cord.
    • DO NOT pinch the power cord in the door, and DO NOT pull it along edges or sharp corners.
    • DO NOT run the power cord under carpeting and rugs.
    • Use caution to prevent tripping on the ord.
    • DO NOT use the device in the following cases:
      • Near a fire source
      • In areas where gasoline, paint, or other flammable goods are stored
      • In an area where the water can be projected
    • DO NOT touch the plug or the device with wet hands. Basic safety precautions should always be followed when using electrical appliances.
    • This appliance has been manufactured for use in domestic environments and should not be used for other purposes.
    • Only use the installation kit provided to install this unit.
    • DO NOT attempt to extend the Hose or install this unit using methods other than those shown in this manual. Improper installation will void any existing warranties.
    • DO NOT use an extension cord with this unit.
    • This appliance can be used by children aged 8 years and above, and persons with reduced physical, sensory, or mental capabilities, or a lack of experience and knowledge, if they have been given supervision or instruction concerning the use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance.
    • Cleaning and user maintenance shall not be made by children without supervision.
    • Never insert your fingers or rods into the air outlet. Take special care to warn children of these dangers.
    • The manufacturer is not liable for injury caused to persons or property damage due to non-compliance with maintenance instructions and improper use of the appliance.

    PARTS DESCRIPTIONHoneywell-MO08CESWS6-Portable-Air-Conditioner-figure-1

    1. Control Panel\ (Incl. Signal Receptor)
    2. Air Outlet
    3. Handle
    4. Casters
    5.  Dust Filter 11) Upper Rubber Drain Plug (Dehumidifier Mode)
    6. Back Grill
    7. Hose Connector
    8. Power Supply Cord
    9. Remote Control
    10. Lower Rubber Drain Plug (Air Conditioning Mode)
    11. Upper Rubber Drain Plug (Dehumidifier Mode)

    INSTALLATION

    It is important that the installation instructions below are followed for the successful installation of this Portable Air Conditioner. Please call Customer Support if you have any difficulties or queries regarding these installation procedures.

    Installation KitHoneywell-MO08CESWS6-Portable-Air-Conditioner-figure-2

    1. Window Bracket Kit (1 Set)
    2. Window Bracket Panel Adapter (1 Piece)
    3. Exhaust Hose Connector (1 Piece)
    4. Hole Cover (1 Piece)
    5. Exhaust Hose (1 Piece)

    Installation Steps

    1. Exhaust Hose Connector, Exhaust Hose, and window bracket panel adapter are pre-assembled
      inside the package.Honeywell-MO08CESWS6-Portable-Air-Conditioner-figure-3
    2. The Window Brackets are approximately 19.7″ (50 cm) each, allowing you to install them on windows and balcony doors of different heights or widths.Honeywell-MO08CESWS6-Portable-Air-Conditioner-figure-4
      To install the window bracket to the window frame, you need to adjust the height or width of the window bracket by extending the length according to the height or width of the window. When the length is set, tighten the Adjustable Knobs (preinstalled on the window bracket) to ensure the window bracket is secured in the desired position. Use both pieces of the window bracket as needed.
      Note: After setting the window bracket to the size of your window, please remove it from the window
      and follow the instructions below.
    3. Connect the Exhaust Hose to the Exhaust Hose Connector on the back of the unit. Slide in the Exhaust Hose Connector. Press the button to lock the Exhaust Hose Connector in place.Honeywell-MO08CESWS6-Portable-Air-Conditioner-figure-5
    4. Connect the window bracket to the window bracket panel adapter. Slide the window bracket panel adapter, then rotate clockwise until it is locked in place.Honeywell-MO08CESWS6-Portable-Air-Conditioner-figure-6
    5. Connect the window bracket to the window.Honeywell-MO08CESWS6-Portable-Air-Conditioner-figure-7
    6. The Portable Air Conditioner is now ready to use.
      IMPORTANT: Do not replace or lengthen the Exhaust Hose, as this could cause the unit to malfunction.Honeywell-MO08CESWS6-Portable-Air-Conditioner-figure-8

    WARNING: Any warranties included with this product will be voided if an extra extension Hose is added to the originally provided installation kit or if the installation is performed differently than the manufacturer’s instructions, without proper consultation. Please contact Customer Support for help with installation procedures if needed.

    • The supplied Hose has a diameter of 5.5″ (14 cm) and can be extended from 12″ to 47″ (30 cm to 120 cm).
    • Do not bend (to the extent shown below) the Hose. A bent Hose will block exhaust air and cause the unit to malfunction or shut off.
    • Make sure the back of the unit is at least 20″ (50 cm) away from the wall. Do not place the unit in front of curtains or drapes, as this could obstruct the airflow.

    USE & OPERATION

    CONTROL PANEL Honeywell-MO08CESWS6-Portable-Air-Conditioner-figure-9

    1. Power Control / Standby Mode
    2. Timer Control
    3. Warning Light (when flashing)
    4. Timer Light
    5. Mode Control
    6. Fan Speed Control
    7. Timer / Temperature Set Controls
    8. Filter Alert

    FUNCTION BUTTONS 

    POWER CONTROL

    The Power Control turns the unit on and off. When the unit is plugged in, this button lights u, indicating it is in a Standby Mode, ready to be switched on anytime.

    TIMER CONTROL

    While the unit is turned on, press the timer button, then press the + or – to select the number of hours you would like the unit to continue to run. The unit will turn off automatically.

    AUTO TURN OFF

    While the unit is running, press the button and the display will flash. While the display is flashing, press the + or – button to select the number of hours you want the unit to turn OFF automatically.

    AUTO TURN ON

    When the unit is in a standby mode (plugged in with the power light on), then press the + or – button to select the number of hours until you want the unit to automatically start running.

    TEMPERATURE / TIMER SET CONTROLS

    • Used for adjusting the timer and thermostat.
    • The default display is the set temperature.
    • In cooling mode, when the + or – button is pressed, the set temperature is displayed and may be adjusted. After 10 seconds, the display will revert to room temperature. Temperature is only adjustable in cool mode. The time is adjustable between 1 – 24 hours.

    Note: By pressing both + and – buttons at the same time, the display will toggle between Celsius(°C) and Fahrenheit(°F).

    WARNING LIGHT

    Condensation may accumulate in the unit. If the internal tank becomes full, the Power Control light will flash and the unit will not operate until the unit has been drained (refer to Water Condensation Drainage).

    MODE CONTROL

    • Settings: Air Conditioning, Dehumidifying, Fan. The corresponding indicator light will illuminate to indicate the current mode setting.
    • Air Conditioning Mode
      Adjust fan speed and air temperature to suit your desired comfort level. The temperature setting range is 16°C – 32°C (61°F – 89°F).
    • Dehumidifying Mode
      Air is dehumidified as it passes through the unit, without being in full cooling mode. If the room temperature is higher than 25°C (77°F), fan speed can be adjusted; otherwise, fan speed is preset to LOW.
    • Note: If the unit will be used mainly as a dehumidifier, do not connect the Hose. Continuous drainage is then necessary (refer to Continuous Draining for Dehumidifier Mode).
    • Fan Mode
      For air circulation without air conditioner cooling.

    FAN SPEED CONTROL
    Applicable for model MO08 Series: High and Low. Applicable for model MO10 Series: High, Medium, and Low.

    FILTER ALERT
    When the Filter Alert Light is ON, it is time to clean the filter. Switch the air conditioner OFF and carefully remove the filter from the unit, and clean it. Replace the filter and switch ON the air
    conditioner. The Filter Alert Light should not be illuminated until the filter requires cleaning again. The frequency of filter cleaning depends on the room environment conditions. Some rooms may require changing more frequently than others.

    REMOTE CONTROL Honeywell-MO08CESWS6-Portable-Air-Conditioner-figure-10

    The functions work the same as the Portable Air Conditioner’s Control Panel. All key functions can be accessed from the remote control.

    Note:

    • Battery Installation: Remove the cover on the back of the remote control and insert two AAA batteries with + and – pointing in the proper direction according to the polarity markings.

    Caution

    • Use only two AAA or IEC R03 1.5V batteries.
    • Remove the batteries if the remote control is not in use for a month or longer.
    • All batteries should be replaced at the same time; do not mix with old batteries.
    • Do not mix alkaline, standard (carbon-zinc), or rechargeable (nickel-cadmium) batteries.
    • Properly dispose of used batteries.

    This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.

    These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and usedbyh the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

    • Reorient or relocate the receiving antenna.
    • Increase the separation between the equipment and the receiver.
    • Connect the equipment info to an outlet on a circuit different from that to which the receiver is connected.
    • Consult the dealer or an experienced radio/ TV technician for help.

    Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

    CLEANING & MAINTENANCE

    Appliance Maintenance

    • Turn off the appliance before disconnecting the power supply.
    • Only clean the appliance with a soft dry cloth.

    Dust Filter Maintenance

    The dust filter is to be cleaned every two weeks to maintain air cooling efficiency. Please follow the instructions below for cleaning the dust filters:

    • Turn off the appliance and remove the upper and lower dust filters.
    • Rinse it in lukewarm water. After cleaning, dry in a shaded Honeywell MO08CESWS6 Portable Air Conditioner and cool place, then reinstall.

    End of Season Storage & Maintenance

    1. If the appliance will not be used for a long time, follow these steps:
    2. Be sure to drain the leftover water condensation. Remove Honeywell MO08CESWS6 Portable Air Conditioner the lower drain plug and use a shallow pan to collect the water (make sure to replace the drain plug when finished). To dry excess moisture, run the unit in Fan only mode for 30 minutes before storing.
    3. Turn off and unplug the air conditioner from the power supply.
    4. Remove the dust filter and clean it with water. Dry the dust filter and then reinstall it.
    5. Disconnecting the Window Installation Kit:
      • Remove the Hose from the unit by rotating anti-clockwise to unlock the The
        mechanism then slides out.
      • Remove the window bracket panel adapter from the window bracket by rotating counterclockwise, pulling away.
      • It is recommended to store the Window Kit parts in a bag together with the Remote Control and place them together with the air conditioner unit.
      • If needed, you can clean the Window Kit with a damp cloth and water before storing. Make sure all parts of the Window Kit are dry before storage.
    6. Cover the air conditioner with a cloth/plastic bag before storage, to protect from dust and scratches collecting on the surface of the unit.
    7. It is recommended to coil the power cord before storing it to ensure the cord is protected from bends and creases.
    8. Store the air conditioner in a cool, dry place, away from direct sunlight.

    WATER CONDENSATION DRAINAGE 

    When there is excess water condensation inside the unit, the air conditioner stops running and shows a warning light (the Power Control button flashes with a red light). This warning light indicates that the water condensation needs to be drained using the following procedures:

    Manual Draining for AC & Dehumidifier Mode

    Water may need to be drained in high-humidity areas.

    1. Unplug the unit from the power source.
    2. Place a shallow pan under the lower rubber Honeywell MO08CESWS6 Portable Air Conditioner drain plug. See diagram.
    3. Remove the lower rubber drain plug.
    4. Water will drain out and collect in the shallow pan.
    5. After the water is drained, replace the lower Honeywell MO08CESWS6 Portable Air Conditioner rubber drain plug firmly.
    6. You can now turn on the unit.

    Continuous Draining for Dehumidifier Mode

    While using the unit in dehumidifier mode, continuous drainage is recommended.

    1. Unplug the unit from the power source.
    2. Remove the upper/lower rubber drain plug. Some residual water may spill, so please have a pan to collect the water. See diagram.
    3. Connect the drain connector to a ¾” Hose or standard garden Hose (not included).
    4. The water can be continuously drained through the drain tube into a floor drain or bucket.
    5. Replace the drain plug.
    6. You can now turn on the unit.

    TROUBLESHOOTING GUIDE

    The following troubleshooting guide addresses the most common problems. If problems persist, call customer support. Unplug and disconnect the appliance from the power source before attempting to troubleshoot.

    ERROR CODE GUIDE

    Best Honeywell Portable AC 2025 Honeywell MO08CESWS6 Honeywell MO08CESWS6 Features Honeywell MO08CESWS6 Review Honeywell Portable Air Conditioner MO08CESWS6 Honeywell AC
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    Gabriel Smith

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