Honeywell MO08CESWK 8,000 BTU Compact Portable Air Conditioner MECH-LEAK Error Fix: Water Leaking from Unit

Error code MECH-LEAK on the Honeywell MO08CESWK 8,000 BTU Compact Portable Air Conditioner means: Water Leaking from Unit. Water is leaking from the portable AC onto the floor — check that the drain plug at the bottom/back is fully tightened, the unit is level (not tilted), and the continuous drain hose (if connected) is not kinked or blocked; in dehumidifier mode, ensure the drain hose runs downhill to the drain point; if leaking from the front, the evaporator drain pan may be cracked and requires service

The most successful fix is "Replace Evaporator Drain Pan" (medium difficulty, ~60 minutes). Estimated DIY cost: $10-$20. HomeMD has 2 community-ranked fixes for this error.

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Yes — the top-ranked community fix ("Replace Evaporator Drain Pan") is rated medium difficulty and takes about 60 minutes. Tools needed: Phillips screwdriver, Silicone sealant (optional).

DIY cost: $10-$20. Professional repair typically costs $150-$250. Many homeowners save money by trying the top-ranked community fix first.

The Honeywell MO08CESWK 8,000 BTU Compact Portable Air Conditioner has 8 other known error codes, including: CF (Clean Filter Reminder), E1 (Room Temperature Sensor Fault), E2 (Evaporator Temperature Sensor Fault), E3 (Condenser Temperature Sensor Fault), E4 (Water Tank Full — Unit Stopped), and 3 more.

Error code MECH-LEAK also appears on 1 other Honeywell model: MN14CCSBB 14,000 BTU Portable Air Conditioner with Dehumidifier and Remote Control. The fix may vary by model, so check each model's specific page for tailored repair steps.