❄️Refrigerator

Jenn-Air · JS42NXFXDE Built-In 42 in 20.7 cu ft Built-In Side-by-Side Refrigerator with Advanced Water Filtration

Jenn-Air JS42NXFXDE Built-In 42 in 20.7 cu ft Built-In Side-by-Side Refrigerator with Advanced Water Filtration CO Error Fix: Compressor Overload / Overcurrent

The compressor's overcurrent protection has tripped — the compressor is drawing more current than normal; the most common cause is dirty condenser coils forcing the compressor to work harder; clean the condenser coils thoroughly (located behind the front grille on built-in models or behind/underneath freestanding models); also check the compressor start relay and start capacitor — a failed relay causes the compressor to attempt starting and immediately trip the overload; if the coils are clean and the relay/capacitor are good, the compressor motor itself may be failing (requires professional diagnosis)

Medium severity2 fixes available

Quick Answer

Error CO on the Jenn-Air JS42NXFXDE Built-In 42 in 20.7 cu ft Built-In Side-by-Side Refrigerator with Advanced Water Filtration means: Compressor Overload / Overcurrent. The top-ranked community fix is “Test and Replace Compressor Start Relay and Capacitor” (medium difficulty, ~45 min, DIY cost: $15-$30). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · refrigerator

Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.

When to Call a Professional

While many refrigerator repairs can be done safely at home, consider hiring a qualified technician if:

The repair involves electrical wiring, gas lines, or refrigerant
You've tried the top-ranked fix and the error persists
You smell gas, see sparking, or notice water leaking
The repair requires specialized tools you don't have
Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $150-$250.

Other Jenn-Air Models with Error CO

JB36NXFXLE 36 in Built-In French Door Refrigerator with Preserva Food Care

refrigerator · 2 fixes

JFFCC72EFS French Door 22.1 cu ft French Door Refrigerator with Turbo Cool and LED Lighting

refrigerator · 2 fixes

Other Jenn-Air JS42NXFXDE Built-In 42 in 20.7 cu ft Built-In Side-by-Side Refrigerator with Advanced Water Filtration Error Codes

Communication Failure

2 fixes

Defrost Failure

2 fixes

Defrost Heater Open

2 fixes

Defrost Thermostat (Bi-Metal) Fault

2 fixes

Fresh Food Fan Not Operating

2 fixes

Freezer Fan Failure

2 fixes

Freezer Ice Probe / Ice Level Sensor

2 fixes

High Temperature Alert — Fresh Food

2 fixes

People Also Ask About Jenn-Air JS42NXFXDE Built-In 42 in 20.7 cu ft Built-In Side-by-Side Refrigerator with Advanced Water Filtration Error CO

What does error code CO mean on a Jenn-Air JS42NXFXDE Built-In 42 in 20.7 cu ft Built-In Side-by-Side Refrigerator with Advanced Water Filtration?

Error code CO on the Jenn-Air JS42NXFXDE Built-In 42 in 20.7 cu ft Built-In Side-by-Side Refrigerator with Advanced Water Filtration means: Compressor Overload / Overcurrent. The compressor's overcurrent protection has tripped — the compressor is drawing more current than normal; the most common cause is dirty condenser coils forcing the compressor to work harder; clean the condenser coils thoroughly (located behind the front grille on built-in models or behind/underneath freestanding models); also check the compressor start relay and start capacitor — a failed relay causes the compressor to attempt starting and immediately trip the overload; if the coils are clean and the relay/capacitor are good, the compressor motor itself may be failing (requires professional diagnosis)

How do I fix error code CO on my Jenn-Air JS42NXFXDE Built-In 42 in 20.7 cu ft Built-In Side-by-Side Refrigerator with Advanced Water Filtration?

The most successful fix is "Test and Replace Compressor Start Relay and Capacitor" (medium difficulty, ~45 minutes). Estimated DIY cost: $15-$30. HomeMD has 2 community-ranked fixes for this error.

Is error code CO on a Jenn-Air JS42NXFXDE Built-In 42 in 20.7 cu ft Built-In Side-by-Side Refrigerator with Advanced Water Filtration serious?

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Can I fix Jenn-Air JS42NXFXDE Built-In 42 in 20.7 cu ft Built-In Side-by-Side Refrigerator with Advanced Water Filtration error CO myself?

Yes — the top-ranked community fix ("Test and Replace Compressor Start Relay and Capacitor") is rated medium difficulty and takes about 45 minutes. Tools needed: Phillips screwdriver, Nut driver set, Multimeter.

How much does it cost to repair Jenn-Air JS42NXFXDE Built-In 42 in 20.7 cu ft Built-In Side-by-Side Refrigerator with Advanced Water Filtration error CO?

DIY cost: $15-$30. Professional repair typically costs $150-$250. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Jenn-Air JS42NXFXDE Built-In 42 in 20.7 cu ft Built-In Side-by-Side Refrigerator with Advanced Water Filtration have?

The Jenn-Air JS42NXFXDE Built-In 42 in 20.7 cu ft Built-In Side-by-Side Refrigerator with Advanced Water Filtration has 8 other known error codes, including: CF (Communication Failure), dF (Defrost Failure), dH (Defrost Heater Open), dt (Defrost Thermostat (Bi-Metal) Fault), FC (Fresh Food Fan Not Operating), and 3 more.

Which other Jenn-Air models have the CO error?

Error code CO also appears on 2 other Jenn-Air models: JB36NXFXLE 36 in Built-In French Door Refrigerator with Preserva Food Care, JFFCC72EFS French Door 22.1 cu ft French Door Refrigerator with Turbo Cool and LED Lighting. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the Jenn-Air JS42NXFXDE Built-In 42 in 20.7 cu ft Built-In Side-by-Side Refrigerator with Advanced Water Filtration have?

The Jenn-Air JS42NXFXDE Built-In 42 in 20.7 cu ft Built-In Side-by-Side Refrigerator with Advanced Water Filtration has 8 other known error codes:

CF — Communication Failure (2 fixes)
dF — Defrost Failure (2 fixes)
dH — Defrost Heater Open (2 fixes)
dt — Defrost Thermostat (Bi-Metal) Fault (2 fixes)
FC — Fresh Food Fan Not Operating (2 fixes)
FF — Freezer Fan Failure (2 fixes)
FI — Freezer Ice Probe / Ice Level Sensor (2 fixes)
HF — High Temperature Alert — Fresh Food (2 fixes)

Which other Jenn-Air models have the CO error?

Error code CO also appears on 2 other Jenn-Air models:

JB36NXFXLE 36 in Built-In French Door Refrigerator with Preserva Food Care (refrigerator) · 2 fixes
JFFCC72EFS French Door 22.1 cu ft French Door Refrigerator with Turbo Cool and LED Lighting (refrigerator) · 2 fixes

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