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Error code reference

Electrolux Washer Error Code HF/BF

Control relay sense fault.

Electrolux codesElectrolux washer codes

Control relay sense fault.

First step from the service manual

Refer to test (18) - Check power in for voltage under load.

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

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What HF/BF means on a Electrolux washer

The HF/BF error code on an Electrolux washer indicates a control relay sense fault. This means the control board has detected an abnormal condition related to the relay that monitors incoming power to the machine. The relay sense circuit is responsible for confirming that power is being properly delivered and maintained under load conditions. When the control board cannot verify the expected voltage through this sensing circuit, it triggers the HF/BF fault and halts operation to prevent potential damage to components.

The primary diagnostic path for this fault is test 18, which involves checking the incoming power supply for voltage under load. Voltage under load testing is critical because some power issues only appear when the machine is actively drawing current. A supply line that reads correctly at idle may show a significant voltage drop when the washer's motor, pump, or heating elements are energized. This can point to problems with the household circuit, the terminal block, wiring connections, or internal relay components on the control board itself.

Common contributing factors include loose or corroded wiring at the power terminal block, a failing main control board relay, inadequate supply voltage from the household circuit, or a tripped breaker that is not fully resetting. Because the fault is tied to power integrity under load, intermittent failures are possible and may require testing during an active wash cycle to capture the fault condition accurately.

Source: manufacturer service documentation.

Common causes of HF/BF

  1. 01

    Inadequate or dropping supply voltage under load

    Wiring / connection

    The household circuit supplying the washer may not maintain proper voltage when the machine draws current during operation. Testing voltage at the outlet or terminal block while the washer runs is the recommended first step.

  2. 02

    Loose or corroded wiring at the power terminal block

    Wiring / connection

    Poor connections at the terminal block can cause voltage drops that trigger the relay sense fault. Inspect all terminals for looseness, discoloration, or corrosion and reseat or replace as needed.

  3. 03

    Faulty main control board relay

    Part replacement

    The relay on the control board that senses incoming power can fail or produce intermittent readings. If wiring and supply voltage check out correctly, the control board itself is likely the source of the fault.

  4. 04

    Tripped or weak circuit breaker

    Wiring / connection

    A breaker that has partially tripped or is beginning to fail may not hold proper voltage under the washer's load. The breaker should be fully cycled off and on, and verified for correct amperage rating.

  5. 05

    Damaged or deteriorated power cord

    Part replacement

    Internal damage to the power cord can introduce resistance that reduces delivered voltage under load. Inspect the cord for kinks, burn marks, or damaged insulation and test continuity across each conductor.

See the test procedure for each cause

Frequently asked questions about HF/BF

What does HF/BF mean on a Electrolux washer?
HF/BF on an Electrolux washer means the control board has detected a control relay sense fault. The machine monitors incoming power through a relay sensing circuit, and this code appears when the expected voltage cannot be confirmed under load. The washer stops operation to prevent component damage until the issue is resolved.
Can I fix the HF/BF error myself?
Some causes of the HF/BF fault are DIY-friendly, such as checking the household circuit breaker, testing the outlet voltage, or inspecting the power cord and terminal block connections. However, if the fault points to the main control board relay, board replacement typically requires disassembly of the machine and comfort working with electrical components. If you are unsure about testing live voltage under load, a qualified technician should perform the diagnostics.
Is it safe to use my Electrolux washer while the HF/BF code is showing?
No, you should not continue using the washer while this code is active. The HF/BF fault indicates a problem with how power is being delivered or sensed, which could involve unsafe voltage conditions or a failing relay. Running the machine in this state risks damage to the control board or other components, and it can also pose a risk to the household circuit.
How much does it cost to repair the HF/BF error on an Electrolux washer?
Repair costs depend on the root cause. If the issue is a tripped breaker or a loose terminal connection, there may be little to no parts cost involved. A replacement power cord typically runs in the range of $20 to $60 in parts. If the main control board needs replacement, parts and labor combined can range from $150 to $400 or more depending on the model and service rates in your area.
Will resetting my Electrolux washer clear the HF/BF error code?
A power reset may temporarily clear the HF/BF code, but if the underlying fault condition still exists, the code will return once the washer attempts to run again. Because this fault is specifically triggered under load, the problem may not reappear until the machine is actively running a cycle. A reset alone is not a fix and should not substitute for proper voltage and wiring diagnostics.

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