Webasto Low-Voltage Control Supply Instability

Webasto charger’s front LEDs or display flicker or are very dim, but charging may still function intermittently.

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

Failing low-voltage power supply capacitor, Loose low-voltage connector on PCB, Partial short on LED/display board, Overvoltage or surge damage

Safety first: Flickering indicators can precede full control failure. Avoid opening the unit while powered.

Power cycle: Turn off the breaker for several minutes and restore power to see if the flicker persists.
Check for patterns: Note if flickering occurs only during high load or at certain temperatures; this helps technicians diagnose.
Service inspection: A technician should measure the low-voltage rails on the PCB, inspect capacitors for bulging, and reseat connectors. Replace the low-voltage supply module or main PCB if unstable.

Hard 4/5

Webasto Low-Voltage Power Supply / LED-Display Board

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