A flashing red light on a ground-fault circuit interrupter (GFCI), a device that interrupts power when current follows an unintended path, is a reason to read the exact model’s instructions. It can indicate that the device failed its automatic protection test. Do not assume every red light means the same thing or that an outlet delivering power is still providing protection.
Stop using a wet, hot, scorched, loose, or crackling device. Do not attempt a reset to clear a warning in those conditions. Smoke, fire, active arcing, or signs of a developing fire call for leaving the area and calling 911.
Match the indicator to the device
The comparison below covers named product families and the manufacturer’s published guidance checked on October 10, 2026. It is not a wiring guide or a universal color code. Obtain the exact model from existing paperwork or a safely visible label; an electrician can identify markings that require device removal.
| Manufacturer and model family | Indicator | Published meaning and response |
|---|---|---|
| Leviton SmartlockPro GFTR family, including GFTR1 | Solid or flashing red | Follow the model’s TEST/RESET instructions if the device is otherwise safe. Persistent red or inability to reset calls for replacement under the manufacturer’s guidance |
| Leviton GFTR family | No light | Can accompany a tripped state or missing supply. The device cannot reset without incoming power; an unlit LED alone does not identify the failed part |
| Legrand radiant 1597TR family | Solid red | Legrand identifies this as a tripped state for this family |
| Legrand radiant 1597TR family | Flashing red | A failed automatic self-test signals that the device should be replaced |
Sources: Leviton LED diagnosis guide for GFTR and related families and Legrand 1597TR product information and manufacturer technical answers. The Leviton guide is marked © 2025; the Legrand technical-support answer on the linked 1597TR product page is dated June 30, 2022. Both sources were checked on October 10, 2026. Revisions, combination devices, and other brands can differ.
A brief flash is different from a persistent warning
Some Leviton instructions note a brief red indication during power-up or reset. That does not make a repeating or persistent red indication normal. Record when it occurs and whether the device remains in its reset position, without repeatedly pressing buttons to reproduce it.
Read the manual that applies to the exact device. A red light on an ordinary outlet, surge protector, charger, or arc-fault device cannot be interpreted with this GFCI table. A manufacturer support page can help identify the product when the exterior is unclear.
Why a reset may not work
A GFCI can refuse to reset because incoming power is absent, a fault persists, the connections are incorrect, or the device has failed. A recently installed device requires an installation check as well as a product check. Repeatedly pushing RESET does not distinguish these possibilities.
For an intact, dry device without warning symptoms, follow its normal user test only as the manufacturer directs. If it will not reset or the warning returns, stop using the affected outlets and arrange diagnosis. Do not hold RESET in, defeat the protection, or move a suspect appliance to an unprotected outlet to keep using it.
The GFCI keeps tripping guide covers recurring trips, outdoor moisture, and connected equipment. The dead-outlet guide explains why other outlets can lose power when an upstream GFCI operates.
What replacement should include
Replacement is more than matching the face color. The electrician should verify the circuit, device rating, required protection, downstream outlets, installation conditions, and test operation. Replacing a GFCI does not repair water entry, a damaged cord, or a faulty appliance.
Ask which outlets depend on the device and how to carry out the routine test for the replacement model. Keep its instructions and record the model. Automatic self-testing does not eliminate every manufacturer’s user-testing requirement.
Information to send with a service request
Include the visible brand, any known model, whether red is steady or flashing, affected outlets, recent installation work, and whether the problem follows rain or use of one appliance. A safe exterior photo can be useful. Do not remove the device or open the box for identification.
For a persistent warning, request outlet diagnosis. If replacement is needed, we can explain the outlet repair scope and distinguish a failed device from a fault elsewhere on the circuit.
