--- title: "Refrigerator error code rT" description: "LG refrigerator error code rT: A modern refrigerator adjusts what it does to the kitchen around it — how long to run, how often to defrost, when to worry…" url: "https://lgmiami.support/error-codes/refrigerator-ambient-sensor/" date_modified: "2026-09-05" Appliance type: "Refrigerators" --- # Refrigerator error code rT ### What rT means on this make A modern refrigerator adjusts what it does to the kitchen around it — how long to run, how often to defrost, when to worry about condensation on the door mullion. The ambient sensor is how it knows. Losing it is not dramatic and nothing thaws, but the machine stops being clever: it runs to a fixed pattern, which in a Miami summer means it is guessing low on a day when it should be working hard. LG’s own note is exactly that — performance drops rather than stops. ### The other ways LG prints this one rT · Er rT LG publishes a condition and then every string that can stand for it, and which one your machine shows depends on the panel it was built with — OE, E03 and E21 are one condition on a washer, and Er dS, F dS and r dS are one sensor on different evaporators. They are one page here, so whichever of them you searched for, this is the right page. ### Where this appears, and why not to clear it On the appliance’s own display. LG reports errors two ways: machines with a digital display show a code, and the laundry machines without one blink their indicator lights instead. Both are published by the maker and both are on this site. Photograph what the panel shows before cutting the power. On a refrigerator you can also force the last code back onto the display by holding Freezer Temperature and Express Frz together for three seconds — LG documents that, and it is the one thing that makes a first visit more useful. A code that has been reset is information a technician no longer has. ### What to do about it - Check the machine is not standing somewhere it was never meant to, like a hot garage or against an oven. - Cut the power for five minutes. - If the code returns, book it — but this one is not an emergency and can wait for a convenient day. ### Where this goes next The job this usually becomes is [diagnostic visit](/services/diagnostic-visit/), and that page carries a starting figure and the reasons that move it. If it turns out to be nothing — and on this make a real share of these are modes, reminders and settings rather than problems — the visit ends there and you pay the diagnostic and nothing else, or call [(305) 419-0291](tel:+13054190291) and describe what the panel is doing before booking anything. Ambient temperature sensor What this one means What rT means on this make A modern refrigerator adjusts what it does to the kitchen around it — how long to run, how often to defrost, when to worry about condensation on the door mullion. The ambient sensor is how it knows. Losing it is not dramatic and nothing thaws, but the machine stops being clever: it runs to a fixed pattern, which in a Miami summer means it is guessing low on a day when it should be working hard. LG’s own note is exactly that — performance drops rather than stops. The other ways LG prints this one rT · Er rT LG publishes a condition and then every string that can stand for it, and which one your machine shows depends on the panel it was built with — OE, E03 and E21 are one condition on a washer, and Er dS, F dS and r dS are one sensor on different evaporators. They are one page here, so whichever of them you searched for, this is the right page. Where this appears, and why not to clear it On the appliance’s own display. LG reports errors two ways: machines with a digital display show a code, and the laundry machines without one blink their indicator lights instead. Both are published by the maker and both are on this site. Photograph what the panel shows before cutting the power. On a refrigerator you can also force the last code back onto the display by holding Freezer Temperature and Express Frz together for three seconds — LG documents that, and it is the one thing that makes a first visit more useful. A code that has been reset is information a technician no longer has. What to do about it Check the machine is not standing somewhere it was never meant to, like a hot garage or against an oven. Cut the power for five minutes. If the code returns, book it — but this one is not an emergency and can wait for a convenient day. Where this goes next The job this usually becomes is diagnostic visit, and that page carries a starting figure and the reasons that move it. If it turns out to be nothing — and on this make a real share of these are modes, reminders and settings rather than problems — the visit ends there and you pay the diagnostic and nothing else, or call [(305) 419-0291](tel:+13054190291) and describe what the panel is doing before booking anything. --- **[Read full article: Refrigerator error code rT](https://lgmiami.support/error-codes/refrigerator-ambient-sensor/)**