How to Clear Error Codes on GHL Aquarium Devices (November 2026)
Last updated: November 3, 2026. Steps checked against the current app and official help pages.
GHL (GHL Advanced Technology) makes aquarium controllers like ProfiLux, Doser pumps and Mitras lights. When something goes wrong, the device shows an error or alarm, and the status LED behind the GHL logo can change color or blink. Most errors clear once you fix the cause and acknowledge the alarm.
What Does GHL Device Error Codes Mean?
A GHL error is an alarm raised by a sensor, pump, light or connection problem. It is shown in GHL Connect, on the controller display, and through the status LED.
Quick Fix for GHL Device Error Codes
- Open GHL Connect or myGHL and read the full alarm text.
- Fix the cause (sensor, level, connection or calibration).
- Acknowledge or reset the alarm in the app.
- Restart the device if the alarm does not clear.
Common Causes
- Sensor out of range or needs calibration
- Water level or leak alarm
- Lost connection (Wi-Fi, LAN or PAB bus)
- Outdated firmware
- Power problems
How to Fix GHL Device Error Codes Step by Step
1. Read the alarm in GHL Connect
The app shows which device and sensor caused it.
2. Calibrate sensors
pH, ORP and conductivity probes need regular calibration.
3. Check PAB and network connections
Reseat PAB cables and check Wi-Fi or LAN.
4. Update firmware
Use GHL Connect to update the controller and devices.
5. Software reset
In GHL Connect, use the device reset option, then restart.
6. Contact GHL support
For hardware faults, contact GHL or your dealer.
FAQ
Will a reset delete my settings?
A normal restart does not. A factory reset does, so back up settings first.
Axee Davies is the founder of AxeeTech, publishing gaming guides, codes, and Windows how-tos since March 2013. A tech enthusiast for 13+ years — starting with smartphones and Android rooting — he now runs a site that puts out a new guide every day for Roblox players, traders, and Windows users. More about AxeeTech
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