Technical data, tools and notes for refrigeration and electronics technicians.

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Role of Current Relays in Compressor Ignition mbsmpro
29, Jan 2026
Role of Current Relays in Compressor Ignition

Selecting the right electrical components is the heartbeat of refrigeration maintenance. When a compressor fails to start or constantly trips, the culprit is often a mismatched Current Relay or a fatigued Thermal Overload Protector. Ensuring these parts align perfectly with the compressor’s horsepower (HP) and amperage rating is vital for…

Mbmpro 2025 12 26 190305
26, Dec 2025
Compressor database chart Relay Olp 

A refrigerator compressor does not run alone; it depends on a start relay and an overload protector (OLP) to start safely and avoid burning out. The wiring diagram of compressor, relay, and OLP shows how power flows from the thermostat, through protection devices, to the motor windings, keeping domestic fridges…