MODEL PROFILE
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MODEL OVERVIEW
About this model: Midea MRT18S4AWW
MRT18S4AWW has three paired-LED diagnostic patterns in its exact linked top-freezer manual.
Identify this top-freezer before interpreting lights
Midea Canada's MRT18S4AWW page identifies an 18-cubic-foot, 29.5-inch-wide top-freezer refrigerator in white. It divides nominal storage into 13.9 cubic feet of fresh-food space and 4.1 of freezer space. The product listing names reversible doors, two crisper drawers, LED interior lighting and electronic controls; it explicitly says no ice maker. The linked owner PDF puts MRT18S4AWW on its cover alongside three older MT18 variant numbers, so this is a shared family manual that still names the target SKU. Check the full rating label before using the LED table. The diagnostic pattern here is a pairing of indicator lights, not a two-character error number. A different Midea refrigerator may have an E1 screen or sound pattern instead, which would change the interpretation.
Place, level and power the cabinet carefully
This owner guide describes the refrigerator as freestanding only, not recessed into a cabinet. It recommends three inches of open space above, behind and at both sides for circulation, and a strong level floor. It asks for a grounded three-prong outlet and a dedicated circuit, with no adapter or extension lead. The exact product page lists 120 V, while the shared manual calls for a 115-volt supply; use the rating plate on the actual unit and a qualified installer where the supply is uncertain. If the cabinet was laid horizontally, the manual says to leave it upright 24 hours before plugging it in. Its general before-use instruction otherwise gives about two hours after transport. Check the door swing and hinge side clearance before reversing the door; a poor fit can cause warm food without any LED fault.
Know the normal LED and freezer settings
The refrigerator control has a setting button, LED1 through LED5 for increasing coldness and a separate LED6 standby indicator. At initial power-up the panel shows all lamps for three seconds, then defaults to the middle LED3 setting. A press changes the selected coldness; the refrigerator applies the new setting after about 25 seconds. Holding the setting control for three seconds enters standby, where the compressor does not operate and LED6 lights. A brief press returns to normal operation. The freezer has its own physical coldness control, so food that feels warm may reflect a setting or a long door opening rather than a sensor circuit fault. The manual says a failure makes the relevant LEDs flash in sequence; take a short video if the pattern is too quick to describe accurately.
Read the three paired indicator patterns
The rendered error table on physical PDF page 21 gives three combinations. LED1 together with LED2 identifies the refrigerator temperature sensor circuit. LED1 with LED3 refers to the freezer defrost sensor. LED1 with LED4 refers to the ambient-temperature sensor. The shared LED1 in all three rows is important; seeing LED2, LED3 or LED4 alone as the selected coldness level is not the same diagnostic. The printed table does not specify whether a failed sensor, its wiring or a board is responsible for each condition. Avoid buying a component from the light pair alone. Note which lights flash together, whether LED6 standby is active, and the temperatures in both compartments. If the pairing persists, communicate the complete model and video to qualified service instead of opening the electrical housing.
Use owner checks without masking a fault
For a refrigerator that does not run, the manual first checks the plug, household fuse or breaker and a wider power failure. If fresh food is warm, it checks a frequently opened or unclosed door, a recent large load, an overly warm setting and the time since reconnection. It says to allow four hours for full cooling after a long disconnection before adding food. Keep the gasket clean and flexible; packages must not prevent the door from sealing. Regular cleaning requires unplugging and removing food, with a mild solution for shelves and interior. An odor from unwrapped food or harmless refrigerant sound is not one of the three LED patterns. If cooling actually fails, protect perishable food promptly and report the observed indicator pair even if a simple owner check also needs correction.
Verified model details
Exact Canadian 18-cu.-ft. top-freezer model
Source for this detailFive setting LEDs versus three paired fault patterns
Source for this detailCover and error table verified on PDF pages 1 and 21
Source for this detailSafe owner checks and service boundary
Source for this detail
This description summarizes the linked source documents; check each cited source for your exact model and region.
Manufacturer source
Open official source
18.0 Cu. Ft. 30" Top Mount Freezer Refrigerator MRT18S4AWW
Open official sourceIf there is a safety risk, stop using the appliance and follow the manufacturer’s instructions.