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    Home » Honeywell HF08CESWK Portable Air Conditioner User Manual
    Honeywell

    Honeywell HF08CESWK Portable Air Conditioner User Manual

    Gabriel SmithBy Gabriel SmithSeptember 18, 2025Updated:September 22, 2025No Comments18 Mins Read
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    Honeywell HF08CESWK Portable Air Conditioner
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    Honeywell HF08CESWK Portable Air Conditioner

    Honeywell-HF08CESWK-Portable-Air-Conditioner-PRODUCT 1

    SAFETY

    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 cord.
    • DO NOT use the device in the following cases:
      – Near a fire source
      – In areas where gasoline, pain,t 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 lack of experience and knowledge, if they have been given supervision or instruction concerning the use of the appliance safely 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.
    • The appliance shall be installed by national wiring regulations. The appliance is not to be used by persons (including children) with reduced physical, sensory, or mental capabilities or lack of experience and knowledge, unless they have been given supervision or instruction.
    • Children should be supervised to ensure that they do not play with the appliance.

    THANK YOU

    Congratulations on your purchase of this Honeywell Portable Air Conditioner. Regarding the information about the installation, handling, servicing, cleaning, and disposal of the appliance, please refer to the paragraph below in the manual.

    USER TIPS

    Portable Air Conditioners are ideal for spot cooling. The compressor, condenser, and evaporator are housed in a compact unit. The air is dehumidified and cooled while a flexible hose sends heat outside. Models like the Honeywell HF08CESWK Portable Air Conditioner are designed for reliable cooling in small to medium rooms.

    The Portable Air Conditioner includes a window venting kit. No permanent installation is needed. The unit is easy to move from room to room and offers a truly flexible air conditioning solution. This Honeywell portable AC setup is quick and user-friendly.

    Auto Evaporation System – The unit automatically evaporates the condensate through the hose. There is no need to empty the drainage tank except in humid conditions. Read and follow the instructions carefully for Honeywell HF08CESWK troubleshooting and maintenance tips.

    To ensure optimal efficiency of the product, keep doors and windows closed when it is used as an air conditioner or dehumidifier. If the product is being used with the fan function only, an open window could improve air circulation.

    If you’re looking for other Honeywell air conditioner manuals, check out our Honeywell MN1CFS8 Portable AC Manual.

    Honeywell-HF08CESWK-Portable-Air-Conditioner-FIG-19

    Important:
    Before installing the unit, place it UPRIGHT for 1 hour before use to allow the refrigerant to stabilize.
    The air outlet automatically opens when the unit is turned on and automatically closes when the unit is
    turned off. Manually adjust the air vent located at the top of the unit to adjust the direction of air flow.

    • Follow the installation instructions to set up the unit.
    • Plug the unit into a properly grounded circuit. DO NOT plug into an extension cord.

    PARTS DESCRIPTION

    Honeywell-HF08CESWK-Portable-Air-Conditioner-PRODUCT

    1. Control Panel
    2. Air Outlet
    3. Handle
    4. Casters
    5. Remote Control
    6. Hose Connector
    7. Cord Winder
    8. Upper Dust Filter
    9. Upper Rubber Drain Plug (Dehumidifying Mode)
    10. Lower Dust Filter
    11. Drain Tube (For Continuous Drain)
    12. Drain Plug Cap
    13. Lower Rubber Drain Plug (Air Conditioning Mode)
    14. Drain Pan
    15. Power Supply Cord

    INSTALLATION

    The installation instructions below must be 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.

    Honeywell-HF08CESWK-Portable-Air-Conditioner-FIG-1

    Installation Kit:

    1. Window Bracket Kit (1 Set)
    2. Plastic Pin (2 Pieces)
    3. Window Bracket Panel Adapter (1 Piece)
    4. Hose (1 Piece)
    5. Hose Connector (1 Piece)
    6. Foam Seal (adhesive) (2 Pieces)
    7. Drain Pan (1 Piece)
    8. Foam Seal (non-adhesive) (1 Piece)

    Installation Steps:
    1. The window bracket panel adapter, hose, and hose connector are pre-assembled inside the package.

    Honeywell-HF08CESWK-Portable-Air-Conditioner-FIG-2

    Adjust the window bracket as per the width or height of your window and insert the plastic pin to fix it at the desired position. There is a hole where the hose will be inserted later. Make sure this hole is not blocked.

    Note: After setting the window bracket to the size of your window, please remove it from the window
    and follow the instructions below.

    Honeywell-HF08CESWK-Portable-Air-Conditioner-FIG-4

    Hose: Dia. 5.9″ (15 cm) Length: 10.6″ to 59″ (27 cm to 150 cm)

    Connect the window bracket to the window bracket panel adapter. Ensure that all connections are tight and installed properly.Honeywell-HF08CESWK-Portable-Air-Conditioner-FIG-5

    Cut the Foam Seal (adhesive) to the proper length and attach them to the window sash and frame.

    Honeywell-HF08CESWK-Portable-Air-Conditioner-FIG-6 Honeywell-HF08CESWK-Portable-Air-Conditioner-FIG-7

    Connect the window bracket to the window.

    Honeywell-HF08CESWK-Portable-Air-Conditioner-FIG-20

    Cut the Foam Seal (non-adhesive) to the window length. Stuff the Foam Seal (non-adhesive) between the inner window sash and the outer window glass to prevent air and insects from getting into the room.

    Honeywell-HF08CESWK-Portable-Air-Conditioner-FIG-22

    The Portable Air Conditioner is now ready to use.

    IMPORTANT:
    Do not replace or lengthen the hose, as this could cause the unit to malfunction.

    Honeywell-HF08CESWK-Portable-Air-Conditioner-FIG-10

    Honeywell-HF08CESWK-Portable-Air-Conditioner-FIG-11

    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 Honeywell portable AC installation procedures if needed.

    • The supplied hose has a diameter of 5.9″ (15 cm) and can be extended from 10.6″ to 59″ (27 cm to 150 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, which may require Honeywell HF08CESWK troubleshooting.
    • Make sure the back of the unit is at least 20″ (50 cm) away from the wall. Do not place the Honeywell HF08CESWK Portable Air Conditioner in front of curtains or drapes, as this could obstruct the airflow.

    USE AND OPERATION

    1. Indicator Lights
    2. Power Control
    3. Filter Reset
    4. Fan Speed Control
    5. Timer / Temperature Set Controls
    6. Mode Control
    7. Timer Control
    8. Sleep Control

    NOTE: For detailed instructions to set up your Portable Air Conditioner for connected operation from your smartphone or tablet, separate user manual can be downloaded at:

    FUNCTION BUTTONS

    POWER CONTROL

    The Power Control turns the unit on and off. The air vent will automatically open when the unit is turned ON and automatically close when the unit is turned OFF.

    FILTER RESET

    When the operation has reached 250 hours, the Filter Reset light will illuminate. Switch the Portable Air Conditioner OFF and carefully remove filters from the unit, and clean them. Replace filters and press the Filter Reset button; the Filter Reset light will turn off, and the operation time will be cleared.

    USE AND OPERATION CONTINUED

    FUNCTION BUTTONS (CONTINUED)

    FAN SPEED CONTROL

    4 settings: High, Medium, Low, and Auto.

    Note: Auto fan speed can be selected in cooling mode only

    TEMPERATURE CONTROL

    The default display is the set temperature. In cooling mode, when or button is pressed, the set temperature is displayed and may be adjusted.
    Note: By pressing both buttons at the same time, the display will toggle between Celsius (°C) and Fahrenheit (°F).

    MODE CONTROL

    Settings: Air Conditioning, Dehumidifying, Fan, Auto. The corresponding indicator light will illuminate to indicate the current mode setting.

    • Air Conditioning Mode (COOL) Adjust fan speed and air temperature to suit your desired comfort level. The temperature setting range is 16°C – 32°C (60°F – 90°F). Ambient temperature range is 16°C – 35°C (60°F – 95°F).
    • Dehumidifying Mode (DRY) 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).

    IMPORTANT: The Dehumidifier mode is used to support moisture reduction but should not be expected to dehumidify to the same degree as a standard dehumidifier-only appliance. The built-in dehumidifier automatically adjusts dehumidification based on ambient room temperatures. It is not possible to adjust to a desired humidity percentage. The front display only shows the current and desired temperatures. It does not show humidity levels.

    • Fan Mode
      For air circulation without air conditioner cooling.
      Note: Auto fan speed cannot be selected in fan mode.
    • Auto Mode
      Press the or button to select the temperature you want. In this mode, the unit will automatically select cooling or fan only depending on the set temperature and the room temperature. The Portable Air Conditioner will control the room temperature automatically around the set temperature.
      Note: Fan speed can’t be adjusted in auto mode.

    USE AND OPERATION (CONTINUED)

    FUNCTION BUTTONS (CONTINUED)

    TIMER CONTROL

    The Timer is adjustable between 1 – 24 hours.

    AUTO TURN OFF:
    While the unit is running, press the Timer 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 nit is in a standby mode (plugged in with the power light on for seconds when plugged, then turns off), press the Timer button, and the display will flash. While the display is flashing, press the or button to select the number of hours until you want the unit to turn ON automatically.

    SLEEP MODE

    When the Sleep Mode is activated in Air Conditioning mode, the set temperature will increase by 1°C or 1°F after the first hour of cooling and will increase a further 1°C or 1°F after the second hour of  cooling. The unit will maintain this temperature for 5 hours. The set temperature will then reduce by 1°C or 1°F on the seventh hour and further by 1°C or 1°F on the tenth hour. Sleep mode will then deactivate automatically.

    Note: The Sleep Mode can be deactivated during cooling mode by pressing any button at any time.

    WATER FULL ALARM

    Condensation may accumulate in the unit.  If the internal tank is full, error code “P1” will be displayed and an alarm will beep for 3 seconds. The unit will not operate until the water has been drained from the lower drain plug (refer to  Water Condensation Drainage).

    After switching the Portable Air Conditioner off, the compressor will not start immediately. You must wait about 4 minutes before it switches back on again.

    WI-FI MODE^
    When the Smart Portable Air Conditioner is connected to the wifi function, the indicator light
    will be illuminated.

    ^THIS IS ONLY FOR MODEL HF08CESVWK / HF10CESVWK WITH WI-FI SMART FEATURES

    USE AND OPERATION (CONTINUED)

    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 used according to 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, as outlined in the Honeywell HF08CESWK manual or through Honeywell portable AC troubleshooting steps.

    • 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 AND MAINTENANCE

    Appliance Maintenance:

    1. Turn off the appliance before disconnecting the power supply.
    2. 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 Below are instructions below for cleaning the dust filters:

    1. Switch off and unplug the Portable Air Conditioner from the electrical outlet.
    2. Remove the Upper Filter/ Grill, unscrew the Lower Filter/ Grill, and carefully remove.
    3. Gently wash using water and/ or diluted liquid dishwashing detergent. Rinse thoroughly and gently shake excess water from the filters. Make sure the filters are dry before reinstalling.
      Note: You may use a vacuum cleaner to remove dust.
    4. Replace the Upper Grill onto the unit, Honeywell HF08CESWK Portable Air Conditioner and reinstall the Lower Grill with the screw.

    WARNING: DO NOT power or operate the Portable Air Conditioner when cleaning or when the Dust Filter is removed from the unit, or if there is a loose-fitting Dust Filter. DO NOT attempt to handle or
    touch any of the parts or wiring inside the Rear Grill after the Dust Filter has been removed from the
    unit. Doing so can cause serious injury or  Honeywell HF08CESWK Portable Air Conditioner electrical shock.

    CLEANING AND MAINTENANCE (CONTINUED)

    End of Season Storage and Maintenance:
    If the appliance will not be used for a long time, follow these steps:

    1. Be sure to drain the leftover water condensation. Remove the lower drain plug and use a drain
      pan to collect the water (make sure to replace the drain plug cap when finished).
    2. To dry excess moisture, run the unit in Fan only mode for 30 minutes before storing.
    3. Turn off and unplug the Portable Air Conditioner from the power supply.
    4. Remove the dust filter and clean it with Honeywell HF08CESWK Portable Air Conditioner water. Dry the dust filter and then reinstall it.
    5. Disconnecting the Window Installation Kit:
      • Remove the Hose from the unit by rotating counterclockwise, then pulling away.
      • Remove the Foam Seal, Window Bracket, Window Bracket Panel Adapter, and Hose Connector.
      • It is recommended to store the Window Kit parts in a bag together with the Remote Contr.l,
        Drain the Tube and place it together with the Portable 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 Honeywell HF08CESWK Portable Air Conditioner Kit are dry before storage.
    6. Cover the Portable 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 Portable Air Conditioner in a cool, dry place, away from direct sunlight.

    WATER CONDENSATION DRAINAGE

    When there is excess water condensation inside the unit, the Portable Air Conditioner stops running and shows an error code “P1” with an alarm. This indicates that the water condensation needs to be drained using the following procedures:

    Manual Draining in Cooling, Dehumidifying, and Auto Modes

    Water may need to be drained high-humidity areas.

    1. Unplug the unit from the power source.
    2. Place a drain pan under the lower rubber drain plug. See diagram.
    3. Remove the drain plug cap.
    4. Water will drain out and collect in the drain pan.
    5. After the water is drained, replace Honeywell HF08CESWK Portable Air Conditioner the drain plug cap.
    6. You can now turn on the unit.

    Continuous Draining in Dehumidifier Mode
    While using the unit in dehumidifier mode,  Honeywell HF08CESWK Portable Air Conditioner continuous drainage is recommended.

    1. Unplug the unit from the power source.
    2. Remove the upper drain plug cap. Some residual water may spill, so please have a pan to collect the water.
    3. Connect the drain tube (included) to the upper drain plug. See diagram.
    4. The water can be continuously drained through the drain tube into a floor drain or bucket.
    5. Replace the drain plug cap.
    6. You can now turn on the unit.

    IMPORTANT: It is NOT recommended to connect the drain hose for continuous drainage while the unit is switched ON in air conditioning cooling Honeywell HF08CESWK Portable Air Conditioner mode. Doing so can reduce the cooling efficiency of the Portable Air Conditioner. Only drain the water condensation when the unit is switched off. Continuous drainage is only suitable when the unit is set up in Dehumidifier mode.

    TROUBLESHOOTING GUIDE

    The following troubleshooting guide Honeywell HF08CESWK Portable Air Conditioner addresses the most common problems. If problems persist, call customer support. Unplug and disconnect the appliance from the power source before attempting to troubleshoot.

    Similar issues are covered in the Honeywell HJ0CESWK7 Portable AC Manual.

    PROBLEMPOSSIBLE CAUSESOLUTION
    The air conditioning unit does not startNo electricity.Check for power.
    Batteries in the remote control need to be replaced.Change remote control batteries.
    The power cord is not properly plugged in.Remove and reconnect the power cord.
    The safety LCDI plug has tripped (USA / Canada / Mexico only).Reset the safety LCDI plug.Iff the problem persists, contact our customer support (USA / Canada / Mexico only).
    Runs for a short while onlyThe thermostat temperature setting is too close to room temperature.Lower the set temperature.
    The air outlet is blocked.Make sure the hose is properly connected.
    There are tight bends in the air hose.Connect the hose as per the instructions on page 3.

    TROUBLESHOOTING GUIDE (CONTINUED)

    PROBLEMPOSSIBLE CAUSESOLUTION
    Runs but not coolingA door or window is open.Make sure the window or door is closed.
    The dust filter is dirty.Clean the dust filter.
    The hose is detached.Reinstall the hose properly

    (refer to the Installation section).

    The temperature setting is too high.Reduce the temperature setting.
    Air outlet or intake is blocked.Remove blockage.
    The room exceeds the recommended size.Move the unit to a smaller room.
    Large size or number of windows is decreasing cooling effectiveness.Cover windows with curtains or blinds.
    Will not run, and an error code “P1” is displayedExcess water condensation inside the tank.Drain the water (refer to Water Condensation Drainage).

    ERROR CODE GUIDE

    ERROR CODEERROR POSSIBLE CAUSE
    “E1”Indoor temperature sensor failure (open circuit or short circuit).
    “E3”Evaporator temperature sensor failure (open circuit or short circuit).
    “P1”Water full alarm.

    FAQ’s

    Q. How do I set up the Honeywell HF08CESWK Portable Air Conditioner?

    A. Plug the unit into a grounded outlet, connect the vent hose to the window kit, and make sure the hose is straight. Turn it on, set your mode, and enjoy cooling.

    Q. Why is my Honeywell HF08CESWK Portable Air Conditioner not cooling?

    A. Check that windows and doors are closed, the hose is not bent, and the air filter is clean. If it still does not cool, try lowering the set temperature.

    Q. How do I drain water from the Honeywell HF08CESWK Portable Air Conditioner?

    A. Turn off the unit, place a pan under the drain plug, and remove the cap. Let the water flow out, then replace the cap before turning the unit back on.

    Q. How often should I clean the filter on the Honeywell HF08CESWK?

    A. Clean the dust filter every 2 weeks. Remove it, wash it with water, let it dry, then put it back in the unit.

    Q. Can I use an extension cord with the Honeywell HF08CESWK Portable Air Conditioner?

    A. No. Do not use an extension cord. Always plug the unit directly into a grounded wall outlet.

    Honeywell HF08CESWK air conditioner Honeywell HF08CESWK manual Honeywell HF08CESWK portable AC Honeywell HF08CESWK troubleshooting Honeywell portable AC unit Honeywell portable room air conditioner
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    Gabriel Smith

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