Low power (under-voltage) will certainly damage any refrigeration applianceâs compressor. This Fridge Guard protects your appliance by disconnecting the power when it goes below unacceptable level. Additionally, there is a delay when power returns to normal. This will ensure that the appliance is not switched on-off repeatedly during fluctuations nor is it subjected to a massive surge normally experienced when power returns after power cuts. Protect your appliances to avoid losses in the damaged refrigerator that will cause more expenses to replace.