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Error code reference

Electrolux Dryer Error Code HF/BF

Line safe sensing error.

Electrolux codesElectrolux dryer codes

Line safe sensing error.

First step from the service manual

Replace Main Board

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 dryer

The HF/BF error code on an Electrolux dryer indicates a line safe sensing error. This error is tied to the main control board's ability to monitor incoming AC line voltage and verify that the power supply is within acceptable operating parameters. The board continuously checks line conditions to protect the dryer's electrical components, and when the sensing circuit detects an anomaly or fails to read a valid signal, the HF/BF code is triggered and normal operation is halted.

The most direct cause of this error is a fault within the main control board itself, specifically in the line sensing circuitry. Because the board is responsible for interpreting incoming voltage signals, an internal component failure on the board can produce a false or unreadable line condition reading even when the actual power supply is functioning correctly. This is why the primary diagnostic step points directly to replacing the main board rather than beginning with external component checks.

However, upstream power issues can also contribute to this error. Problems such as a weak or shared neutral, a partially failed circuit breaker, or inconsistent voltage delivery to the dryer terminal block can cause genuine line anomalies that the board correctly detects and flags. Before condemning the main board, it is worth verifying that the dryer is receiving proper voltage at the terminal block and that the circuit breaker is fully engaged and functioning correctly. If line voltage checks out, the main board is the most likely failed component.

Source: manufacturer service documentation.

Common causes of HF/BF

  1. 01

    Failed Main Control Board

    Part replacement

    The main board's internal line sensing circuit can fail, causing it to misread or lose the incoming power signal entirely. This is the most common cause and the primary diagnostic target for the HF/BF code.

  2. 02

    Tripped or Weak Circuit Breaker

    Wiring / connection

    A partially tripped double-pole breaker can cut power to one leg of the 240V supply, resulting in an abnormal voltage reading that triggers the line sensing error. Check the breaker panel and fully reset the breaker before replacing any parts.

  3. 03

    Faulty or Loose Power Connection at Terminal Block

    Wiring / connection

    Loose, corroded, or damaged wiring connections at the dryer's terminal block can cause voltage drops or intermittent signal loss that the board interprets as a line fault. Inspect all terminal connections for tightness and signs of heat damage or corrosion.

  4. 04

    Damaged Power Cord

    Part replacement

    A worn or internally damaged 3-wire or 4-wire power cord can introduce resistance or open circuits that produce irregular voltage readings at the board. Visually inspect the cord and test continuity across each conductor.

  5. 05

    Neutral Wiring Issue in Home Electrical Supply

    Wiring / connection

    A weak or open neutral at the outlet or panel can cause voltage imbalances between the two legs of the 240V circuit, which the line sensing circuit may detect and flag. This requires verification with a multimeter at the dryer outlet.

See the test procedure for each cause

Frequently asked questions about HF/BF

What does HF/BF mean on a Electrolux dryer?
The HF/BF code on an Electrolux dryer signals a line safe sensing error, meaning the main control board has detected a problem with the incoming AC power signal. The board monitors line voltage as a protective function, and when it cannot read a valid signal, it stops operation and displays this code. The issue can originate in the board's own sensing circuitry or in the electrical supply feeding the dryer.
Can I fix the HF/BF error myself?
Some basic checks are within reach for a knowledgeable DIYer, including inspecting the circuit breaker, checking the power cord for visible damage, and verifying that terminal block connections are secure. However, if those checks do not resolve the error, the repair requires replacing the main control board, which involves working with high-voltage components and is best handled by a qualified technician.
Is it safe to use my dryer when the HF/BF code is showing?
You should not attempt to use the dryer while this error is active. The HF/BF code is specifically a line safety error, meaning the dryer's own protective system has flagged a concern with the incoming electrical supply. Continuing to operate the appliance before diagnosing the root cause could risk damage to internal components or, if the issue is a wiring fault, present a safety hazard.
Will resetting the dryer clear the HF/BF error?
Unplugging the dryer for a few minutes and restoring power may temporarily clear the code, but it will return if the underlying cause is not corrected. If the main control board's sensing circuit has failed, or if there is a genuine power supply problem, the error will reappear as soon as the dryer attempts to operate again. A reset is a useful first step to confirm the error is persistent, but it is not a fix.
How much does it cost to repair a HF/BF error on an Electrolux dryer?
If the repair requires a new main control board, parts alone typically range from around $80 to $250 or more depending on the specific model, with professional labor adding another $75 to $150 in most markets. If the issue turns out to be a loose connection, damaged power cord, or a tripped breaker, the cost can be significantly lower. Getting a diagnostic visit from a technician before ordering parts is usually worthwhile to confirm the root cause.

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