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Brittany PenningtonAug 11, 2025
How to fix a Thevco VLC-3 Controller when the display doesn't work?
- Bbarbara85Aug 11, 2025
If the display of your Thevco Controller doesn't work, it might be due to several reasons. First, check if the circuit breaker at the service panel is off or tripped and reset it if necessary. Incorrect wiring could also be the cause, so ensure that the wiring is correct. Another potential issue is a blown F11 input fuse, which would require replacement. The voltage selector switch might be in the wrong position, so set it correctly. Lastly, confirm that the display board interconnect cable is firmly plugged into the power supply board.