Brand: Honeywell
Category: Other
Document Type: Manual
Language: EN
Manual for MN12CES / MN10CESWW
Uploaded: Nov. 21, 2025, 6:29 p.m.
Manual Publish Date: 2013-01-01
Warranty Information
5-year limited warranty covering parts and labor, with 5 years on sealed system parts.
Power Control: Turns the unit on and off.
Mode Control: Selects between Cool, Dehumidify, and Fan modes. A light indicates the current mode.
Cooling Mode: Functions as an air conditioner. Adjust fan speed and temperature (61°F - 89°F).
Dehumidifying Mode: Removes moisture from the air. For maximum efficiency, do not connect the exhaust hose and ensure continuous drainage.
Fan Mode: Circulates air without cooling.
Fan Speed Control: Choose from High, Medium, and Low settings.
Timer Control: Set the unit to automatically turn off or on within a 1-24 hour range.
Temperature/Timer Set Controls: Adjust timer and thermostat settings. Display toggles between Celsius and Fahrenheit by pressing both set buttons simultaneously.
Warning Light: Illuminates when the internal water tank is full, indicating the need for drainage.
Important: Wait 3 minutes after turning the unit off before switching it back on.
Troubleshooting and error codes
| Problem | Possible Cause | Solution |
|---|---|---|
| The air conditioning unit does not start | • No electricity. • Batteries in the remote control need to be replaced. • The power cord is not properly plugged in. • The safety GFI plug has tripped. |
• Check for power. • Change remote control batteries. • Remove and reconnect the power cord. • Reset the safety GFI plug, if problem persists contact our customer support. |
| Runs a short while only | • The thermostat temperature setting is too close to room temperature. • Air outlet is blocked. • There are tight bends in the air exhaust hose. |
• Lower the set temperature. • Make sure the exhaust hose is properly connected. • Connect exhaust hose as per instructions on page 9. |
| Runs but no cooling | • A door or window is open. • The air filter is dirty. • The exhaust hose is detached. • Temperature setting is too high. • Air outlet or intake is blocked. |
• Make sure the window or door is closed. • Clean the air filter • Reinstall exhaust hose properly (refer to page 9, Installation) • Reduce temperature setting on control panel. • Remove blockage. |
| Will not run and water full indicator light is ON | • Excess water condensation inside the tank. | • Drain the water. (refer to page 14, Water Condensation Drainage). |