E13
Meross
Real-Time Clock (RTC) or Backup Power Fault
Thermostat displays E13 and time or schedule functions behave erratically; clock may reset unexpectedly.
Advertisements
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Advertisements
Possible Causes
Failed RTC crystal oscillator on PCB, Depleted backup capacitor or coin cell (if used), Firmware not syncing time from cloud due to RTC error
How to Fix / Troubleshooting
Safety: Low-voltage internal fault; still turn off mains before opening the housing.
Steps:
- Check NTP/cloud sync: Ensure the thermostat is online in the Meross app so it can sync time from the cloud. If offline, fix Wi‑Fi issues first.
- Power cycle: Turn off the breaker for 1–2 minutes, then restore power and check if the time holds.
- Inspect PCB (advanced): If accessible, look for a small crystal near the microcontroller and any backup capacitor or coin cell. If visibly damaged or corroded, the board needs replacement.
Outcome: Persistent E13 indicates a hardware RTC fault; replace the thermostat if accurate scheduling is required.
Advertisements
Repair Difficulty
Hard
4/5
Required Part
Real-Time Clock Circuit and Backup Capacitor
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements