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MODEL OVERVIEW
About this model: Midea MRU17B2AWW
MRU17B2AWW has three documented flashing indicator pairs; each points to a different sensor and the owner manual directs service.
Confirm the cabinet and its documentation
MRU17B2AWW is Midea Canada's white, 17-cubic-foot single-door upright that changes between freezer and refrigerator duty. The official model page advertises Total No Frost, easy-roll casters and adjustable legs. Its specifications list four door shelves and say that the door is not reversible; do not assume the hinge can be swapped because another Midea upright allows it. The cover of the owner PDF linked from this exact product page prints MRU17B2AWW. That match matters before reading a fault: the manual describes the actual lamp positions for this cabinet, while products with similar capacity can use a different control. The page also promotes garage use within different ambient limits for each mode, rather than unlimited outdoor installation.
Set up the 17-foot upright before loading it
The installation pages require a flat, sturdy, ventilated indoor place, with more than 100 millimetres between the cabinet and each adjacent wall. Use its own grounded 115-volt, 60-hertz outlet. The levelling feet should leave the front slightly higher than the rear so the tall door closes reliably. Casters make repositioning easier, but the manual says to move the emptied cabinet with more than two people and keep it upright. After initial positioning, allow the unit to operate two to three hours before adding food. The illustrated parts include an air inlet, air outlet, shelf, drawer and door bin; none should be packed so tightly that circulation is blocked. These steps are useful when cooling is weak without a flashing code.
Separate a mode indicator from an alarm
This controller has four named lamps: LED1 marks Freezer/Fridge, while LED2, LED3 and LED4 correspond to Cold, Colder and Coldest. The factory selection is Freezer at Colder. The panel locks after inactivity, so unlock it before trying to change a setting. The manual gives different operating ranges for the two modes; a frozen-food load should never be moved in on the assumption that a selected refrigerator mode will freeze it. On page 12, a lit FRZ./REF. icon means Freezer mode and an unlit one means Refrigerator mode. A three-second Setting hold after unlocking changes the whole cabinet's mode. A steady selection lamp is ordinary; the code table requires two named positions flashing together.
Read all three actual flashing pairs
The rendered error table on physical PDF page 12 shows FRZ./REF. with COLD both flashing for a temperature sensor fault. FRZ./REF. with COLDER both flashing is a defrost sensor fault. FRZ./REF. with COLDEST both flashing is an ambient-temperature sensor fault. The shared FRZ./REF. position alone cannot identify which row applies. Watch several cycles and record which one of the three cold-setting lamps flashes alongside it; note the selected mode and take a clear photo of the whole panel. For every row the manufacturer's solution is to call for service. The manual offers no owner procedure to test or replace the sensors, so avoid converting these patterns into guessed part numbers or a homemade reset sequence.
Protect food while checking simpler causes
If the cabinet has stopped without a verified pair, the troubleshooting chapter first checks plug contact, supply voltage, a power failure and a tripped circuit. Packages can hold the door open, and an uneven floor can make it hard to seal. In freezer use, keep newly bought frozen food separate from fresh unfrozen items; in refrigerator use, cool warm food first, close liquid containers and keep packages away from the rear wall. The guide describes automatic defrost and cleaning with soft materials and neutral detergent. During an outage, reduce door openings and add no fresh load. Warm outer metal or exterior condensation may be ordinary effects of heat and humidity. If a sensor pair persists or temperature is unsafe, move vulnerable food and give service the complete MRU17B2AWW number and observed pattern.
Verified model details
Exact white 17-cu.-ft. Canadian model
Source for this detailConvertible mode and locked controls
Source for this detailThree photographed fault rows on PDF page 12
Source for this detailFood protection and installation checks
Source for this detail
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Manufacturer source
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17 Cu. Ft. Convertible Upright Freezer Unit | Midea CA
Open official sourceIf there is a safety risk, stop using the appliance and follow the manufacturer’s instructions.