mypros+
Error code reference

Frigidaire Refrigerator Error Code Er

IM/RAM Error (on POR only)

Frigidaire codesFrigidaire refrigerator codes

IM/RAM Error (on POR only) – detected as no com/data link with IM by ERF 2500++ system controller (PB).

MyPros+ Max

Get the full diagnostic procedure for Er.

  • 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 Er means on a Frigidaire refrigerator

The Er error code on a Frigidaire refrigerator using the ERF 2500++ system controller indicates an IM/RAM communication error detected during Power-On Reset (POR). Specifically, the main control board (referred to as the PB, or primary board) is unable to establish a data link with the ice maker (IM) module at the moment the system initializes. This error is only flagged during the POR sequence, meaning it is captured at startup rather than during continuous operation, which makes it distinct from runtime communication faults.

The ERF 2500++ system controller coordinates communication between the primary control board and the ice maker through a data bus. When the POR sequence runs and the controller polls the ice maker module for a response, a missing or corrupt reply is interpreted as a no-communication condition, triggering the Er code. This can result from a failed ice maker module, a wiring harness problem between the control board and the ice maker, a faulty connector or damaged pin, or a failure of the primary control board itself that prevents it from properly initiating or reading the data link.

Because the error is tied specifically to the POR event, power cycling the refrigerator will retrigger the diagnostic check. If the underlying communication fault persists across multiple power cycles, a hardware fault is almost certainly present rather than a transient software glitch. Technicians should inspect the wiring harness, connector integrity, and the ice maker module before condemning the primary control board.

Source: manufacturer service documentation.

Common causes of Er

  1. 01

    Faulty or disconnected wiring harness to ice maker

    Wiring / connection

    The data link between the primary control board and the ice maker depends on an intact wiring harness. A loose connector, broken wire, or corroded terminal can interrupt communication and trigger the Er code at startup.

  2. 02

    Failed ice maker module

    Part replacement

    If the ice maker module itself has failed internally, it will not respond to the controller's POR polling request. Replacing the ice maker assembly is typically needed to restore communication.

  3. 03

    Damaged connector pins at the ice maker or control board

    Wiring / connection

    Bent, burned, or corroded pins at either the ice maker connector or the primary board connector can prevent a stable data link from forming. Inspect both ends carefully for physical damage.

  4. 04

    Failed primary control board (PB)

    Part replacement

    If the main control board cannot properly initiate or read the data link during POR, it may generate an Er code even when the ice maker and wiring are intact. This is less common but should be evaluated after ruling out wiring and ice maker issues.

  5. 05

    Transient power anomaly at startup

    Wiring / connection

    In rare cases, a brief voltage irregularity during power-on can cause the POR sequence to misread the ice maker communication. If the error does not return after a clean power cycle, a transient event may have been the cause.

See the test procedure for each cause

Frequently asked questions about Er

What does Er mean on a Frigidaire refrigerator?
The Er code on a Frigidaire refrigerator indicates an IM/RAM error detected during Power-On Reset. It means the ERF 2500++ system controller could not establish a data link with the ice maker module when the refrigerator powered on. This error points to a communication failure between the main control board and the ice maker, caused by wiring issues, a failed ice maker, or a faulty control board.
Can I fix the Er error code myself?
Some causes of the Er code are within reach of a confident DIYer. Checking the wiring harness and connectors between the control board and the ice maker for loose or damaged connections requires no special tools. However, if the ice maker module or primary control board needs replacement, those repairs involve handling refrigerator components and electrical parts that may be better suited to a qualified technician.
Is it safe to keep using my refrigerator when the Er code is displayed?
The Er code specifically affects the ice maker communication and does not typically indicate a problem with the refrigerator's cooling system. Your food should remain safe as long as the refrigerator and freezer sections are maintaining proper temperatures. However, ice maker function will be compromised, and the underlying fault should be addressed to avoid potential further issues with the control system.
Will resetting the refrigerator clear the Er error code?
Because the Er code is triggered during the Power-On Reset sequence, restarting the refrigerator will automatically rerun the diagnostic check. If the communication fault is still present after power cycling, the error will return immediately. A clean reset will only clear the code if the original cause was a transient startup glitch rather than a hardware failure.
How much does it cost to repair the Er error code on a Frigidaire refrigerator?
Repair costs depend on which component is at fault. Wiring harness repairs or connector fixes are relatively inexpensive, often in the range of $50 to $150 including labor. Replacing the ice maker module typically runs $100 to $300 depending on the specific unit and labor rates. A primary control board replacement is the most expensive scenario, generally ranging from $200 to $450 or more with parts and labor.

Related Frigidaire refrigerator codes

All Frigidaire refrigerator codes
View all 100 Frigidaire refrigerator codes

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

Get Started

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