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Surplus City Liquidators sources motor overload protection components directly from manufacturers as overstock. These are brand-new surplus compressor overload parts from overproduction runs, discontinued model lots, or excess inventory buyouts. These are the same discount HVAC compressor protection components available through a traditional HVAC/R parts distributor, arriving in manufacturer or protective packaging where available. "Surplus" describes the sourcing channel, not the condition of the part.

The collection includes external compressor overload protectors (snap-on style) for HVAC and refrigeration compressors, which function as HVAC thermal overload protectors by sensing both current draw and compressor shell temperature to protect motor windings. BTU-rated overload protectors, such as 265V units designed for 12,000 BTU systems, are also available, as are overload relay HVAC kits that include an overload relay with screws and terminals. Inventory rotates based on manufacturer overstock availability; checking current listings for specific voltage and BTU ratings before ordering is recommended.

The key match points are voltage rating, ampere trip rating (or BTU system rating where listed), and mounting configuration. Snap-on protectors must make contact with the compressor terminal or body at the correct position to sense shell temperature accurately. Cross-referencing the part number from the failed overload, or matching the compressor's full-load amperage (FLA) against the overload's rated trip current, is the most reliable verification method. Because overload protectors are compressor-specific in many cases, matching the original part number or the compressor manufacturer's specifications before ordering avoids a mismatch that could either nuisance-trip or fail to protect under a real fault condition.

A tripped overload is a functioning safety device responding to a real condition, such as excessive current draw, high shell temperature, or a locked rotor, and will typically reset once the compressor cools, though the underlying cause still needs to be diagnosed and corrected. A failed overload shows open continuity across its terminals at room temperature on a multimeter, meaning the thermal element has given out and the device will no longer close the circuit under normal conditions; that requires a compressor overload protector replacement. Repeated trips on an overload that tests good are a signal to investigate the compressor, capacitor, contactor, and refrigerant circuit rather than simply replacing the overload.

If the overload tests open at room temperature with a multimeter, replacement is the correct next step, because the device itself has failed. If the overload tests good (closed at room temperature), a single trip after a clear cause such as a power fluctuation or high ambient temperature is not necessarily a sign of failure; addressing the root cause and monitoring the system is the appropriate first move. Bypassing the overload rather than replacing it is a recognized field-test method only, not a repair solution. A compressor running without overload protection can burn its motor windings quickly under fault conditions.

Many compressor overload protectors are industry-standard components compatible with compressors from Copeland, Tecumseh, Bristol, and other common HVAC/R compressor manufacturers, provided the voltage and ampere ratings match. Because inventory is manufacturer overstock, compatibility is determined by matching specifications rather than brand name; product listings include available specs to support cross-referencing before purchase. For proprietary overloads keyed to a specific terminal cover design, verifying mounting configuration and terminal count against the original part is important before ordering.

Overload protectors and overload kits are small, lightweight components that ship via standard ground to all 48 contiguous states without freight complications. Shipping charges are calculated at checkout based on package dimensions, weight, and carrier fuel surcharges. Check online for local pickup availability.