AQUA AQR-TZ42K(S) Refrigerator: Manual & Cooling Troubleshooting

The AQUA AQR-TZ42K(S) is a Japan-market 420 L four-door refrigerator/freezer in Satin silver, with a 146 L freezer and an interior control panel. It has automatic ice making, temperature-setting indicators and door-alarm functions described in the matching AQUA manual. If it appears not to cool, first check household power, the door positions and whether its control lamps are behaving normally. AQUA documents an important demo-mode condition in which lamps change while the interior does not cool; this is not an error code. Keep the full suffix when identifying the appliance. Disconnect and seek professional help for damaged wiring, smoke or suspected refrigerant damage.

Weak cooling, warm compartments and blocked airflow

Check the outlet and supply if the interior lighting is also off. If cooling is weak, inspect the temperature selection, door seals, recent door openings, hot food placed inside and clearance around the cabinet. The manual suggests changing a weak temperature setting toward medium or strong, while allowing warm food to cool first. Do not block the internal cold-air outlets. Ice around packaged food or changing compressor sounds alone do not identify a specific failed part.

Demo mode: verify before arranging a cooling repair

The AQR-TZ42K owner’s manual says that changing indicator lamps without normal cooling can indicate demo mode. For the AQR-TZ42K control panel only, locate the Quick Freeze and Energy Saving (節電) buttons at the rear of the refrigerator and hold both for approximately six seconds to exit demo mode, following the manufacturer’s page 18 directions. Check the temperature settings afterwards. This is a specific operating-mode procedure, not a universal reset or service diagnostic sequence.

Ice production and door alarms

The TZ design has a removable automatic ice-making unit. Inspect the water tank, ice storage, and whether the unit has been reinstalled correctly according to the manual; use its instructions before attempting cleaning. The door alarm sounds if a door is left open. The model manual includes an optional alarm-silencing procedure, but repeatedly silencing an alarm does not resolve an unclosed door.

Capacity, installation and safe use

AQUA lists 420 L total capacity, divided into 274 L for the refrigerator and 146 L for the freezer, with a 10 L chiller area and a 25 L vegetable section within the refrigerator. The dimensions are 700 mm wide, 635 mm deep and 1,825 mm high, with a 119 kg unit weight. Follow the Japan-only AC 100 V electrical requirement and provide the ventilation clearances in the manual. Do not attempt sealed-system repair or open electrical components.

When to call AQUA support

If the appliance remains warm after documented control, door and clearance checks, if an alarm continues with doors closed or if ice-making problems persist, contact AQUA or the retailer with the complete AQR-TZ42K(S) model number. The public manual reviewed here contains symptom guidance and normal status lamps; an applicable alphanumeric fault-code list has not been verified.

Official manual and support

AQUA AQR-TZ42K(S) matching owner manual (Japanese PDF) · AQUA manufacturer product/source page. Relevant troubleshooting sections appear on printed pages 18–20; model specifications are on page 21.