Frigidaire FDPC4221AS 24 in Front Control Dishwasher 50 dBA with ProDry and Delay Start MECH-LATCH Error Fix: Door Latch Not Engaging

Error code MECH-LATCH on the Frigidaire FDPC4221AS 24 in Front Control Dishwasher 50 dBA with ProDry and Delay Start means: Door Latch Not Engaging. The dishwasher door will not latch securely, or the cycle will not start because the control does not detect a closed door — the latch mechanism may be bent, worn, or broken; the door strike plate may be misaligned; the door switch may be faulty; check the latch alignment and test the door switch for continuity; some models require the latch assembly to be replaced as a unit

The most successful fix is "Test and Replace Door Switch and Latch Assembly" (medium difficulty, ~45 minutes). Estimated DIY cost: $15-$40. 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 ("Test and Replace Door Switch and Latch Assembly") is rated medium difficulty and takes about 45 minutes. Tools needed: T20 Torx screwdriver, Multimeter.

DIY cost: $15-$40. Professional repair typically costs $140-$200. Many homeowners save money by trying the top-ranked community fix first.

The Frigidaire FDPC4221AS 24 in Front Control Dishwasher 50 dBA with ProDry and Delay Start has 8 other known error codes, including: CE (Communication Error Between Boards), ER (Heating Element Error), i10 (Water Fill Timeout), i20 (No Water Detected in Tub), i30 (Drain System Problem or Leak Detected), and 3 more.

Error code MECH-LATCH also appears on 9 other Frigidaire models: FDPC4314AS 24 in Front Control with MaxBoost Dry, FDPH4316AS 24 in Gallery Top Control 52 dBA, FDSH4501AS 24 in Top Control with EvenDry, FFCD2413US 24 in Built-In Dishwasher 60 dBA, FFCD2418US 24 in Front Control Built-In Dishwasher 48 dBA, Frigidaire FGID2468UF 24 in Gallery Integrated Built-In Dishwasher with OrbitClean Wash System, and 3 more. The fix may vary by model, so check each model's specific page for tailored repair steps.