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MODEL OVERVIEW
About this model: Midea MRU14B3AWW
MRU14B3AWW changes between freezer and fridge use; its exact manual identifies three paired flashing fault lights.
Establish which single-door cabinet you have
The Canadian Midea product page calls MRU14B3AWW a white 13.8-cubic-foot convertible upright freezer, 28 inches wide. It has four glass shelves, four plastic door shelves, a clear removable basket and a reversible door; the listing marks an ice maker absent. Its garage-ready claim has mode-specific ambient test ranges, so a cold garage suitable for freezer use is not automatically suitable for refrigerator use. The owner PDF cover names MRU14B3AWW with three other upright variants. That family scope is explicit, but match the entire rating label before following its control diagram. This is a single compartment that changes role; it is not a two-zone refrigerator-freezer. A freezer-mode indicator and three selectable coldness levels share the same small control panel, which is why an ordinary lit symbol should not be mistaken for one of the paired flashes below.
Prepare the cabinet before filling it
Midea describes this unit as freestanding rather than built into cabinetry. The installation text asks for more than 100 millimetres at the sides and limits the rear gap to 75 millimetres, with a ventilated, sturdy indoor location. Use a grounded 115-volt, 60-hertz individual outlet that matches the rating plate. Set the levelling feet so the front is slightly higher than the back; this helps the reversible door close and avoids a warm compartment caused by a gap. On first start the manual calls for a short standing period before connection and two to three hours of cooling before food is loaded, longer in hot summer conditions. Keep vents clear and give a changed setting several hours to settle. Checking the door and location first makes later sensor readings easier to interpret.
Use the panel without confusing mode and fault
The control panel locks automatically after inactivity. Hold the Setting control for three seconds to unlock, then use short presses to choose Cold, Colder or Coldest. The factory mode is Freezer with Colder selected. To switch the whole chamber between freezer and refrigerator operation, unlock and hold the control again for three seconds; the FRZ./REF. icon is lit in freezer mode and unlit in refrigerator mode. That mode lamp by itself is normal. The manual prints operating ranges of about -12 to -22°C as a freezer and 2 to 7°C as a fridge, while the exact product page publishes broader ranges of -1 to -24°C and 1 to 10°C. Those documents do not promise identical endpoints. Check the real controller, allow stabilization, and use a separate thermometer if stored food seems too warm or frozen in the wrong mode.
Decode the three pairs shown in the PDF
On rendered physical page 13, FRZ./REF. together with COLD flashing means temperature sensor fault. FRZ./REF. together with COLDER flashing means defrost sensor fault. FRZ./REF. together with COLDEST flashing means ambient temperature sensor fault. The table calls all three patterns “Both Flashing”; the second icon is what distinguishes them. These are the printed panel symbols, not E1, E2 and E3 codes. Photograph both lights and write down the current operating mode before pressing Setting or removing power. The manual's only solution for each sensor failure is to call for service. A lamp that stays lit steadily to show the selected level is not a fault pattern. Likewise, an unlit FRZ./REF. icon may simply indicate refrigerator mode. Observe whether the pair actually blinks together before treating it as a repair issue.
Protect the contents while arranging service
The troubleshooting chapter permits basic checks of the plug, household circuit, blocked door and cabinet tilt when cooling seems wrong. A long compressor run in summer can follow a large warm load or frequent opening, without matching the three diagnostic pairs. Keep frozen purchases wrapped and avoid placing fresh items next to already frozen packages, which can thaw them. In fridge mode, keep uncovered liquids out and move food away from the back wall, where it can freeze locally. The cabinet has automatic defrost; do not use sharp tools against ice. During a power outage, open the door as little as possible and do not add new food. If a paired warning persists, move vulnerable contents if necessary and give the technician MRU14B3AWW, the two flashing labels, chosen mode and measured temperature. Leave sensor and LED-lamp repairs to qualified service.
Verified model details
Exact 13.8-cu.-ft. white upright freezer
Source for this detailUnlock and select freezer or fridge mode
Source for this detailThree paired indicators on PDF page 13
Source for this detailFood checks and service boundaries
Source for this detail
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13.8 Cu. Ft. Convertible Upright Freezer Twin | Midea CA
Open official sourceIf there is a safety risk, stop using the appliance and follow the manufacturer’s instructions.