Samsung RB2155SW/XAA refrigerator Parts

The most common problems we see with Samsung refrigerators like model RB2155SW are cooling-related issues caused by frost buildup (defrost system trouble) or airflow problems (fan or vent icing). Ice maker complaints are also common on many Samsung models, even when cooling is otherwise normal.

Most common symptoms customers notice

• Fresh food section is warm but the freezer is cold
• Freezer drawer has heavy frost or ice buildup
• Temperature swings, food spoiling faster than expected
• Fan noise, rattling, or a “whooshing” sound that comes and goes
• Water pooling inside the refrigerator or under the unit

Quick checks that solve many “not cooling” complaints

Before replacing parts, we recommend these basics because they often restore airflow and stabilize temperatures:

• Confirm the doors close fully and nothing is blocking the gaskets
• Set temperatures to typical targets: 37°F for the refrigerator and 0°F for the freezer
• Keep vents clear; avoid packing food tightly against the back wall
• Reduce long door openings (the manual notes shorter openings reduce ice formation)
• Unplug the refrigerator for 5 minutes, then restore power to reset controls

For model-specific operating and care guidance, use the RB2155SW owner's manual.

Parts that commonly relate to frost buildup and cooling problems

If you have recurring frost, warm temperatures, or intermittent cooling, these components are often involved:

Problem pattern	Common area to inspect	Example part for RB2155SW
Freezer frosts over, airflow drops	Defrost sensing and safety devices	Refrigerator defrost thermal fuse DA47-00095E
Temperatures read wrong or swing	Temperature sensing	Refrigerator temperature sensor assembly (model-specific)
Water puddles after defrost	Drain path and grommet	Refrigerator drain tube grommet (model-specific)

Why it matters

Cooling and defrost issues can snowball: frost blocks airflow, temperatures rise, and the sealed system has to run longer than normal. Fixing airflow and defrost problems early helps protect food quality and reduces strain on major components like the compressor.

Last updated: January 2026

On the Samsung RB2155SW refrigerator, RD (refrigerator defrost) runs a defrost cycle aimed at clearing frost from the fresh food (refrigerator) evaporator area, while FD (forced or full defrost) runs a more aggressive defrost intended to clear heavier ice buildup across the cooling system. For normal frost issues in the fridge section, use RD; for widespread icing symptoms, use FD. See the RB2155SW owner's manual for the exact button sequence and display behavior.

When to use RD vs FD

Use the option that matches where the frost problem is showing up.

• Use RD when the refrigerator section is warm, airflow is weak, or you see frost behind the rear panel in the fresh food compartment.
• Use FD when the freezer is heavily iced, the unit has widespread airflow restriction, or you suspect the defrost system needs a full clear-out.
• If the problem returns quickly after a forced defrost, focus on the defrost components (sensor, thermal fuse, drain path) rather than repeating forced defrost.

What to check if icing comes back

Forced defrost is a temporary reset; recurring frost usually points to a failed part or a drainage issue.

• Ice buildup behind the evaporator cover (restricted airflow)
• A clogged or frozen drain causing water to refreeze
• A failed defrost sensor or temperature sensor
• A blown defrost thermal fuse
• Door left open or a poor door seal letting humid air in

Common related parts for this model

Symptom	What it often points to	Example part for RB2155SW
Frost returns in days	Defrost sensing problem	Refrigerator temperature sensor assembly DA32-10105S
Meltwater refreezes, puddles	Drain restriction	Refrigerator drain tube grommet (model-specific)
No heat during defrost	Defrost safety open	Refrigerator defrost thermal fuse (model-specific)

Why it matters

Heavy frost blocks airflow across the evaporator, so the refrigerator can run constantly but still warm up. Using RD or FD can restore cooling short-term, but fixing the underlying defrost or drain issue prevents repeat icing and food temperature swings.

Last updated: January 2026

A water puddle on the floor with a Samsung RB2155SW refrigerator is usually caused by a defrost drain problem: the drain hole or drain tube is clogged or frozen, so defrost water overflows inside the cabinet and eventually leaks out onto the floor. Use the steps in the RB2155SW owner's manual to safely access and clean the drain path.

Most common causes (and what to check first)

• Clogged defrost drain hole under the evaporator; water cannot flow to the drain pan.
• Frozen drain tube from ice buildup in the drain trough.
• Drain tube grommet restricted or dirty, slowing drainage and causing overflow.
• Door not sealing well (warm air adds frost, creating more defrost water).
• Refrigerator not level, letting water run forward instead of toward the drain.

Quick troubleshooting steps

1. Unplug the refrigerator before removing panels or working near wiring.
2. Remove the freezer contents and look for ice or standing water on the freezer floor.
3. Melt ice in the drain trough using warm (not boiling) water and a turkey baster.
4. Flush the drain with warm water until it flows freely to the drain pan underneath.
5. Inspect and clean the drain outlet and grommet; replace it if it is hardened or deformed.

If the grommet is damaged or repeatedly clogs, replacing the refrigerator drain tube grommet da63-00951c is a common fix.

What you should see (normal vs. not normal)

Symptom	Most likely issue	Typical fix
Water under crisper or on fresh-food floor	Drain backing up and overflowing	Clear drain hole and tube
Sheet of ice on freezer bottom	Frozen drain trough/tube	Defrost, then flush drain
Puddle appears every few days	Partial clog or restricted grommet	Clean or replace grommet
Water after door left ajar	Excess frost leading to heavy defrost	Improve door seal, reduce humidity

Why it matters

When the drain cannot carry defrost water to the external drain pan, water takes the easiest path out of the cabinet. Fixing the drain prevents recurring leaks, ice buildup, and temperature swings that can affect food storage.

Last updated: January 2026