mypros+
Error code reference

Haier Refrigerator Error Code 2nd LED Refrigerator flash

Refrigerator sensor 1 (R1 SNR) error

Haier codesHaier refrigerator codes

Refrigerator sensor 1 (R1 SNR) error – sensor located at refrigerator damper assembly has failed or is out of range.

MyPros+ Max

Get the full diagnostic procedure for 2nd LED Refrigerator flash.

  • 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 2nd LED Refrigerator flash means on a Haier refrigerator

The 2nd LED Refrigerator flash on a Haier refrigerator indicates a fault with the R1 SNR, which is the primary refrigerator compartment temperature sensor. This sensor is physically located at the damper assembly, the component that controls airflow between the freezer and fresh food sections. The control board monitors this sensor continuously to regulate damper position and maintain target temperatures. When the sensor signal falls outside the expected range or is lost entirely, the board triggers this flash code to alert the technician.

The R1 SNR is a negative temperature coefficient (NTC) thermistor, meaning its electrical resistance decreases as temperature rises. The control board reads this resistance to calculate compartment temperature. A failed sensor typically presents as either an open circuit (extremely high or infinite resistance) or a short circuit (near-zero resistance), both of which push the reading outside acceptable parameters. Wiring harness damage, corrosion at the connector pins, or physical damage to the sensor body at the damper location are the most frequent causes of this type of fault.

Because the sensor is mounted at the damper assembly, any service work involving the damper, evaporator cover, or fresh food section liner can disturb the sensor or its wiring. Ice buildup in the damper area can also physically stress the sensor and its connector. Diagnosing this fault requires measuring sensor resistance at a known temperature and comparing it against the expected NTC curve, as well as inspecting the wiring harness from the sensor back to the control board for continuity and damage.

Source: manufacturer service documentation.

Common causes of 2nd LED Refrigerator flash

  1. 01

    Failed R1 NTC temperature sensor

    Part replacement

    The sensor itself has developed an open or short circuit and is no longer sending a valid resistance signal. This is the most common cause and is confirmed by measuring sensor resistance with a multimeter and finding a reading that is either infinite or near zero.

  2. 02

    Corroded or damaged sensor connector

    Wiring / connection

    Moisture near the damper assembly can cause corrosion at the sensor harness connector, increasing resistance in the circuit and producing an out-of-range reading. Inspect the connector pins for green or white oxidation and clean or replace as needed.

  3. 03

    Damaged wiring harness

    Part replacement

    The wire run between the R1 sensor and the control board can be pinched, cut, or broken, especially if the refrigerator has recently been serviced or moved. A continuity test on each wire in the harness will identify an open or shorted conductor.

  4. 04

    Ice buildup at the damper assembly

    Wiring / connection

    Excessive frost accumulation around the damper can physically stress the sensor body or connector, causing an intermittent or permanent fault. Running a manual defrost cycle and then re-testing the sensor can determine whether ice was the root cause.

  5. 05

    Faulty main control board

    Part replacement

    If the sensor and wiring both test correctly, the control board's sensor input circuit may have failed and is misreading or not reading the signal. This is the least likely cause and should only be considered after sensor and harness issues have been ruled out.

See the test procedure for each cause

Frequently asked questions about 2nd LED Refrigerator flash

What does 2nd LED Refrigerator flash mean on a Haier refrigerator?
The 2nd LED Refrigerator flash indicates a fault with the R1 SNR, the primary temperature sensor located at the refrigerator damper assembly. The control board has detected that the sensor signal is absent or outside its accepted range. This prevents accurate temperature monitoring in the fresh food compartment and requires diagnosis of the sensor, its wiring, and connector.
Can I fix the 2nd LED Refrigerator flash error myself?
A knowledgeable DIYer can check for obvious wiring damage and inspect the sensor connector for corrosion without special tools. However, confirming whether the R1 NTC sensor has failed requires a multimeter to measure resistance and compare it against expected values at a known temperature. Replacing the sensor at the damper assembly involves disassembling part of the fresh food section interior, which is manageable but requires care to avoid damaging other components.
Is it safe to keep using my Haier refrigerator when this error is showing?
Continuing to run the refrigerator with an active R1 sensor fault is not recommended for food safety. Without a valid temperature reading from that sensor, the control board cannot reliably regulate damper position, which may result in the fresh food compartment running too warm. Perishable food could spoil more quickly than expected while this fault is present.
How much does it cost to repair the 2nd LED Refrigerator flash error?
If only the R1 SNR sensor needs replacement, parts and labor typically range from $75 to $200 depending on the specific model and local labor rates. If the wiring harness requires repair or replacement, costs can range from $100 to $300. A main control board replacement, if needed, is the most expensive scenario and can range from $200 to $500 or more including labor.
Will resetting my Haier refrigerator clear the 2nd LED Refrigerator flash error?
A power reset by unplugging the unit for several minutes may temporarily clear the error code, but the fault will return if the underlying sensor or wiring problem has not been corrected. The control board will re-detect the out-of-range signal as soon as it resumes monitoring. A reset alone is not a repair and should only be used as part of the diagnostic process.

Related Haier refrigerator codes

All Haier refrigerator codes
View all 26 Haier refrigerator codes

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

Get Started

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