MachineFrigidaire FFTW4120SW

DifficultyEasy

Time30–45 minutes

What you savePart $20–$60 DIY vs $100–$250 professionally

⚠️ BEFORE YOU START

Unplug the washer. Never bypass or jumper a lid lock permanently — it’s the interlock that keeps the drum from spinning with the lid open.

Tools

Putty knife
Screwdriver or socket set
Phone camera

Parts

Lid lock assembly for your model number

Step by step

1 Confirm the lock is actually the problem

Check the outlet and breaker first, and note the symptom: flashing lid-lock light with clicks is the classic failed-lock signature on most top-loaders.
2 Open the top panel

On most top-loaders the whole top hinges up: slide a putty knife under the front corners of the lid panel to release the spring clips, or remove the rear screws, then tilt the top back.
3 Unplug the old lock

The lock sits under the top panel at the lid opening’s front edge — one wiring plug and two or three screws.
4 Fit the new lock

Screw the new assembly into the same spot, connect the plug until it clicks, and route the harness exactly where the old one sat.
5 Reassemble and test

Snap the top down, plug in, and start a cycle: you should hear the lock engage and see the lid light go solid.

Frigidaire FFTW4120SW notes & error codes

On this price tier, any single quote over ~$300 deserves the replace conversation — but belts, locks, and pumps are all well under that line.

Code	What it means
(Basic display)	Most faults show as flashing cycle lights; service mode required to read

Full details for this machine — common problems, causes, and costs — are in the Frigidaire FFTW4120SW repair guide. The general version of these instructions is here.

🔧 WHEN TO CALL A PRO

If a new lock still flashes errors, the control board or its harness is suspect — that diagnosis is faster (and cheaper) with a tech’s meter than with parts roulette. If you'd rather skip it entirely, find a washer repair pro near you →