Door Won't Latch or Cycle Won't Start

On a dishwasher, the symptom of "door won't latch or cycle won't start" is one of the most frequently reported homeowner complaints — and it almost always traces back to a small set of root causes that you can investigate in under fifteen minutes without specialized tools. Pushing the door closed feels normal but the cycle will not start, or the door pops open shortly after starting. Before opening any access panel, unplug the appliance (or shut off the gas where applicable), give it a few minutes for residual current to bleed off, and have a flashlight, a phone camera for documenting cable routing, and a small bowl handy for any water that may release when you disconnect a hose.

Most service technicians work through the same checklist for this complaint, and the order matters because each successive cause requires more disassembly. 1. The latch hook is bent or worn. 2. The door seal is misaligned, holding the door slightly proud. 3. The latch switch behind the latch has failed. 4. The unit is not level and the door is racked, preventing the latch from engaging fully. Walk these in order and stop as soon as one of them resolves the symptom — there is no need to keep digging deeper if an early-list fix restores normal operation.

Practical do-it-yourself steps you can attempt safely: Step 1: Inspect the latch hook on the door for bent metal or wear. Step 2: Run a finger around the door seal to confirm it sits in its track without bunching. Step 3: Test the latch switch with a multimeter for continuity when engaged. Step 4: Check level with a torpedo level on the door frame and adjust the rear feet. After completing the steps, run a short empty cycle to confirm the symptom is gone before reloading the appliance with laundry, dishes, or food. Document anything you replaced — if the same fault returns within a few weeks, the technician will want to know what has already been ruled out.

When to escalate to a service technician: Latch assemblies are inexpensive and field-replaceable; do not bend the hook to compensate as it can damage the strike on the cabinet front. If the unit is still under the manufacturer's parts-and-labor warranty, do not perform any repair that involves opening a sealed system, breaking a tamper sticker, or substituting a non-OEM part — any of those can void coverage. Keep the model number printed on the rating plate and the date of purchase ready when you call; a competent technician can usually narrow the diagnosis over the phone if you describe what you have already tried.