Function: Helps prevent the defrost drain from freezing by conducting heat from the defrost-heater area toward the drain.
Critical Fit / Identification Details: Drain freeze-up prevention probe/strap; replaces W10210798 and 978498. It is not a powered stand-alone defrost heater.
Manufacturer Part Numbers / Cross-References: 819043, W10210798, 978498
What This Listing Includes: One genuine OEM 819043 refrigerator defrost drain heater probe as supplied for the manufacturer service application; other adjacent assemblies/hardware are not implied unless specifically stated.
Model Evidence Note: Verified representative models. Model examples are not exhaustive. Always match the complete model number, including suffix/revision where present, against manufacturer service information.
Correct Part / Compatibility Check: Match the complete appliance model number, exact manufacturer part number, installation position and all critical fit details before ordering. Do not rely on appearance alone.
Distinguish From Similar Parts: Do not confuse this passive drain heat probe/strap with the defrost heater, drain tube, drain pan or electronic defrost control.
Possible Related Symptoms / Reasons to Inspect: No/low heat or uneven heating after confirming the heating circuit, controls and wiring.
Important Safety / Service Note: Disconnect appliance power before service and follow the manufacturer service procedure for the exact model. Use appropriate personal protective equipment and qualified service where required.
Ordering Note: Symptoms can identify a system to inspect, but they do not prove this specific component is defective. Confirm the OEM part number or model-specific parts diagram before ordering.