Sime water heater intermittently shows E19; unit may reboot or freeze.

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.

Possible Causes

Defective main PCB, Voltage spikes, Poor grounding, Corrupted firmware

Safety: Disconnect power before touching electronics.

Steps:

Power reset: Turn off the heater at the main switch for 5–10 minutes, then restore power.
Check supply voltage: Ensure the heater is connected to a stable power source with proper grounding. Avoid sharing circuits with heavy-load appliances.
Inspect PCB: Look for obvious burn marks or swollen components (do not touch components directly).

Professional help: E19 usually requires main PCB replacement or firmware update by an authorized Sime technician.

Professional Required 5/5

Main Control Board (PCB)

Check Price on Amazon

We may earn a commission from links on this page.