What causes 'Control 2.5V Ref < 2V or > 3V' on Physio Control Medical Equipment?
- JJeffrey LaraSep 5, 2025
If your Physio Control Medical Equipment displays 'Control 2.5V Ref < 2V or > 3V', it indicates an electrical fault, a Control board pin connected to the back plate, or a POT +2.5V shortcut. Check the POT or replace the Control board.












