tC is the Turbo Cool setting and tF is the Turbo Freeze setting, which restore the refrigerator or freezer temperature faster after frequent door openings.
The water filter is leaking, needs replacing or is installed backward. On some models, replacing the filter does not reset the indicator automatically.
TurboCool is on. It cools the refrigerator compartment faster, and the refrigerator temperature cannot be changed while it runs; the freezer temperature is not affected.
The filter is reaching its expired state or has expired. If the LED stays red after a replacement, the filter was installed incorrectly, a leak is detected, or an expired filter was installed. When the unit detects a new filter, the LED flashes 3 times and then stays off.
TurboCool is on. The compressor runs and the fans cycle at high speed until the refrigerator compartment cools to approximately 34°F (1°C), then the compressor cycles on and off. After 8 hours, or when TurboCool is pressed again, the refrigerator compartment returns to its original setting.
The washer stopped the cycle and started a 4-minute control lock-out while it pumps out water. GE gives three triggers: a long pause or water left with the lid open, no water reaching the tub during fill, or a fault that stopped the cycle.
The washer detected an out-of-balance load and is trying to rebalance it. It may not reach full spin speed, so the load can come out wetter than normal.
A single left bracket appears when Sabbath mode is set. A second bracket appears after a delay while the oven is baking, and the display returns to a single bracket when the cook time ends. No tone sounds.
A single bracket means Sabbath mode is on and the clock is not shown. Between 30 seconds and 1 minute after you start a bake, ][ appears to show the oven is running. When you press Cancel/Off, ][ changes back to a single bracket.