mypros+
Error code reference

GE Refrigerator Error Code rD

RD-sensor (refrigerator defrost sensor) disconnection or short circuit.

GE codesGE refrigerator codes

RD-sensor (refrigerator defrost sensor) disconnection or short circuit.

First step from the service manual

Measure the resistance between both terminals after separating CN15 of the Main PCB. If disconnected or shorted, change the RD-sensor on the evaporator.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

MyPros+ Max

Get the full diagnostic procedure for rD.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What rD means on a GE refrigerator

The rD error code on a GE refrigerator indicates a fault with the RD-sensor, which is the refrigerator compartment defrost sensor mounted on the evaporator. This sensor monitors temperature during the defrost cycle to ensure the evaporator heats enough to melt frost buildup but does not overheat. When the main PCB detects that the sensor circuit is either open (disconnected) or shorted, it triggers the rD code and may interrupt normal defrost operation.

The diagnostic process centers on connector CN15 on the main PCB. After separating CN15, a technician measures resistance across both sensor terminals. A healthy NTC-type defrost sensor will show a predictable resistance value that changes with temperature. A reading of infinite resistance (open loop) indicates a broken wire or failed sensor element. A reading of zero or near-zero resistance indicates a short circuit within the sensor or its wiring harness.

Common causes include physical damage to the sensor wiring from ice buildup pressing against the harness, corrosion at the connector terminals, or outright failure of the sensor element itself. Because the sensor sits on the evaporator inside the freezer compartment, it is exposed to repeated freeze-thaw cycles that can degrade wire insulation and connector integrity over time. If resistance is abnormal after disconnecting CN15, the RD-sensor on the evaporator must be replaced.

Source: manufacturer service documentation.

Common causes of rD

  1. 01

    Failed RD-sensor element

    Part replacement

    The sensor itself has failed internally, resulting in an open or shorted circuit. This is confirmed by measuring abnormal resistance across the sensor terminals after disconnecting CN15 from the main PCB.

  2. 02

    Damaged sensor wiring harness

    Part replacement

    The wiring between the evaporator sensor and CN15 on the main PCB can crack or break due to repeated freeze-thaw stress or contact with ice. Inspect the full wire run for visible breaks, pinching, or brittle insulation.

  3. 03

    Corroded or loose CN15 connector terminals

    Wiring / connection

    Moisture inside the refrigerator compartment can cause corrosion at the CN15 connector pins, creating an intermittent or permanent open circuit. Inspect the connector for discoloration, oxidation, or loose pin seating.

  4. 04

    Ice buildup pressing on sensor or wiring

    Wiring / connection

    Excessive frost accumulation on the evaporator can physically crush or pinch the sensor and its leads, causing a short or open. A manual defrost followed by inspection can reveal this condition.

See the test procedure for each cause

Frequently asked questions about rD

What does rD mean on a GE refrigerator?
The rD code indicates a problem with the RD-sensor, which is the refrigerator compartment defrost sensor located on the evaporator. The main PCB has detected that the sensor circuit is either open (disconnected) or shorted. This fault can disrupt the defrost cycle, potentially leading to frost buildup on the evaporator coils.
How do I fix the rD error code on my GE refrigerator?
Start by disconnecting connector CN15 from the main PCB and measuring resistance across the RD-sensor terminals. If the reading is infinite or near zero, the sensor circuit is faulty. Check the wiring harness for damage first, and if the wiring is intact, replace the RD-sensor on the evaporator.
Is it safe to keep using my GE refrigerator when the rD code is showing?
Continuing to run the refrigerator with an rD fault is not recommended for extended periods. Without a functioning defrost sensor, the defrost cycle cannot operate correctly, which can lead to heavy frost buildup on the evaporator and reduced cooling performance. Food safety could be affected if cooling is compromised.
Will resetting my GE refrigerator clear the rD error code?
A reset may temporarily clear the code from the display, but the error will return if the underlying sensor fault is not corrected. The main PCB continuously monitors the RD-sensor circuit, so a disconnected or shorted sensor will trigger the code again during normal operation. A proper repair requires inspecting and replacing the faulty component.
How much does it cost to repair the rD error code on a GE refrigerator?
If only the RD-sensor needs replacement, parts typically range from $15 to $50 depending on the specific model, with professional labor adding $100 to $200 in most markets. If the main PCB or a larger wiring harness is involved, total repair costs could rise to $200 to $400 or more. Getting a diagnostic visit from a qualified technician will give you a more accurate estimate for your specific unit.

Related GE refrigerator codes

All GE refrigerator codes
View all 540 GE refrigerator codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass