A lit padlock on the WDT730HAMZ can disable every button; identify Control Lock before treating the panel as unpowered. Confirm the visible symptom before resetting; filters, loading, detergent, water supply and door alignment are safe checks, internal wiring is not. When the lock icon is lit, touch commands are intentionally ignored and pressing a key may only flash the icon. A lock light or repeated lock flashes points to Control Lock; no lights anywhere points instead to supply or breaker checks. Use the WDT730HAMZ owner-manual key sequence to disable Control Lock. If no lock is shown, disconnect power for thirty seconds and reconnect once. If controls still ignore input after unlock and one power cycle, stop resetting and arrange Whirlpool service.
Models covered
Safety first
- Cancel, switch off, close the water valve and let hot dishes cool. Wear gloves near the filter; never tilt a built-in appliance or remove its base or side panels.
What the symptom may indicate
Checks in the right order
- Confirm before acting
When the lock icon is lit, touch commands are intentionally ignored and pressing a key may only flash the icon.
- Make the appliance safe
Cancel, switch off, close the water valve and let hot dishes cool. Wear gloves near the filter; never tilt a built-in appliance or remove its base or side panels.
- Apply the official check
Use the WDT730HAMZ owner-manual key sequence to disable Control Lock. If no lock is shown, disconnect power for thirty seconds and reconnect once.
- Retest once and decide
If controls still ignore input after unlock and one power cycle, stop resetting and arrange Whirlpool service.
Stop and get qualified help when
- Stop for water in the base, an uncontrolled leak, heat or motor code, burning smell, damaged cable or a fault that returns after one empty test.
Next step
Repair, replace a part, or arrange a diagnosis?
Use the checks and stop conditions above to choose a cautious next step. A symptom alone never proves that the appliance has failed.
Resolve it without buying anything
Complete the 4 user-accessible checks in order. If normal operation returns and no warning sign remains, no replacement is indicated.
Replace only the confirmed part
If the checks isolate a worn or blocked component, match its complete reference to the exact appliance model before ordering.
This guide does not identify a replacement part. Do not order a generic component from the symptom alone.
Arrange a diagnosis before replacing the appliance
Stop at any warning sign listed above. A qualified diagnosis should confirm that repair is unsafe, unavailable or uneconomical before an appliance replacement is considered.
Sources used
- Whirlpool — Whirlpool's official support material documents this exact symptom path for WDT730HAMZ; the procedure here keeps only user-accessible checks.
Last checked: 30 August 2026