1954 Sears Coldspot Freezer - Overload relay replacement

Refrigerator & Freezer Repair
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Brand: Sears & Roebuck
Model Number: 106.A540201
Main Symptom: Compressor fails to start
What happens & when: No start. Wiring in horrible shape and will be replaced. Need help identifying a replacement for Delco/GM HWS&O Relay part# 5396577 or a modern alternative. No wiring diagram available, but there is a 3-conductor cable from relay to compressor; 2-conductor cable from relay to power block; 2-conductor cable from power block to line. 2-conductor cable from power block to thermostat.

Existing relay housing is old, cracked bakelite or similar and markings are missing. Similar model # relay (1 year newer model freezer) marked with 120VAC, 1/8HP, OVERLOAD 4.0A. Patent search for 2,242,769 shows the design of the relay and method of action. Current heats an armature which keeps the circuit closed under normal load/draw. When armature is heated above a certain temp, it deflects to a position where the circuit is switched open to protect the load.

Error Code (if any):
Parts or tests already tried:
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Unfortunately, there isn’t a listed compatible replacement for relay number 5396577, and I wasn’t able to find a part listing for the model you provided. That makes it tough to identify a relay that would match the exact operating specs of the original.

There are universal relay kits available that can work in situations like this, but just keep in mind that using one can shorten the lifespan of the compressor. TJ90RCO810 3 In 1 Relay Combo Kit | Genuine Pro OEM In Stock