Parts for ZISS420NRKSS — Refrigerator

We found 9 parts confirmed to fit the Refrigerator ZISS420NRKSS.

Compatibility table

Prices shown are an informational reference range only, not an offer or an Amazon price — RepairKitHub does not sell parts directly. Each part links to an Amazon search so you can compare current listings yourself.

Common failure areas on this model

The confirmed parts above group into a handful of failure areas. Here is what each points to and how to check it before you order anything.

Heat control (thermostats, fuses, heating element)

Symptom: The refrigerator's temperature reads inconsistently, or the compressor and defrost cycle seem out of step with how warm or cold it actually is inside.

Check: A thermistor that has drifted or failed reports the wrong temperature to the control board, so compare the compartment's actual temperature to what the display or dial shows.

Parts in this group on ZISS420NRKSS: WR50X10088 (Refrigerator Defrost Bi-Metal Thermostat).

Cooling system (compressor, condenser, evaporator)

Symptom: The refrigerator or freezer runs warm, the compressor cycles on and off rapidly, or frost builds up heavily inside.

Check: Listen for the compressor and condenser fan actually running, feel the condenser coils for heat, and check the evaporator coil for an ice layer that blocks airflow.

Parts in this group on ZISS420NRKSS: WR50X10036 (Thermostat Evaporator), WR60X10050 (Refrigerator Evaporator Fan Blade), WR60X10185 (RCA Refrigerator Evaporator Fan Motor).

General hardware and mounting parts

Symptom: A small mechanical or mounting part has failed, cracked, or gone missing.

Check: Compare the physical shape and mounting points to the original piece, and confirm the exact part number against your model plate before ordering.

Parts in this group on ZISS420NRKSS: WR55X10030 (Temperature Sensor), WR30X10061 (Electronic I), WR55X10026 (Refrigerator Temperature Sensor), WR86X0096 (Dryer Filter).

Water inlet and drainage

Symptom: The icemaker or dispenser isn't getting water, or a supply-line fitting is leaking.

Check: Check that the water inlet valve is receiving supply pressure and that its screen filter isn't clogged, and inspect the fill tube and fittings for a leak or freeze-up.

Parts in this group on ZISS420NRKSS: WR57X10032 (Refrigerator Water Inlet Valve Assembly).

Before you buy

Match ZISS420NRKSS exactly against the model and serial plate on the appliance itself before ordering anything — a single mismatched character can point to a different production run with different parts. Then check the part number printed or stamped on the part you are replacing against the part numbers in the table above; the printed number is the most reliable way to confirm fitment when a model has gone through multiple production runs. RepairKitHub does not sell parts directly — every part link above routes to an Amazon search for that part number so you can compare current listings and sellers yourself.

How to confirm this is your model

On most refrigerators, the model and serial plate sits inside on a side wall or behind the bottom grille. Match every character exactly, including letters and dashes at the end — appliance model numbers often have similar prefixes but different suffixes for different production runs.

Other refrigerator models

These model numbers sort close to this one in the catalog for the same appliance type. The brand is not confirmed to match, but the model number range is close.

• ZISS420NXASS — 9 parts
• ZISS420NXBSS — 9 parts
• ZISS420NXCSS — 8 parts
• ZISS42DAASS — 10 parts
• ZISS42DCASS — 10 parts
• ZISS420NRJSS — 9 parts
• ZISS420NRHSS — 9 parts
• ZISS420NRGSS — 9 parts
• ZISS420NRFSS — 9 parts
• ZISS420NPESS — 9 parts

Still not sure?

Use the model lookup tool to search by model or part number, or start from the symptom your appliance is showing.