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Error code reference

Electrolux Dryer Error Code H2/B2

Power supply amplitude out of range (too HIGH).

Electrolux codesElectrolux dryer codes

Power supply amplitude out of range (too HIGH).

First step from the service manual

Refer to test (7)

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

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What H2/B2 means on a Electrolux dryer

The H2/B2 error code on an Electrolux dryer indicates that the control board has detected a power supply amplitude that is outside the acceptable operating range, specifically that the incoming voltage is too high. The dryer's control system continuously monitors the AC line voltage to ensure stable operation. When the measured voltage exceeds the upper threshold the control accepts, it triggers this fault to protect internal components from potential damage caused by overvoltage conditions.

This fault is directly tied to the incoming power supply rather than an internal dryer component failure. The primary causes are typically problems at the home's electrical supply, including utility voltage fluctuations, a wiring issue at the outlet or junction box, or a failing neutral connection that causes voltage imbalance on a 240V circuit. A loose or degraded neutral wire is a particularly common culprit because it can cause one leg of a split-phase circuit to rise significantly above its rated 120V nominal level.

Diagnosis requires following test procedure 7 as outlined in the dryer's service documentation. This test is designed to evaluate the power supply characteristics reaching the control board. Technicians should measure the incoming line voltage at the terminal block or outlet with an accurate voltmeter to confirm whether an overvoltage condition is truly present before replacing any components. If voltage readings are within normal range at the outlet but the fault persists, the control board's voltage sensing circuit may itself be at fault.

Source: manufacturer service documentation.

Common causes of H2/B2

  1. 01

    High incoming line voltage from utility

    Wiring / connection

    The utility supply voltage may be running above normal levels, causing the dryer's control board to detect an out-of-range condition. Measure voltage at the dryer's outlet or terminal block to confirm.

  2. 02

    Loose or faulty neutral wire

    Wiring / connection

    A loose, corroded, or broken neutral conductor in a 240V circuit can cause voltage on one leg to rise well above the rated 120V nominal. Inspect the neutral connection at the outlet, junction box, and panel.

  3. 03

    Faulty wall outlet or receptacle

    Part replacement

    A deteriorated or improperly wired 240V receptacle can create abnormal voltage readings at the dryer's power input. Inspect the receptacle for loose terminals, heat damage, or wiring errors.

  4. 04

    Defective control board voltage sensing circuit

    Part replacement

    If measured line voltage is within the correct range but the error persists, the control board's internal voltage monitoring circuit may be malfunctioning and reporting a false overvoltage fault.

  5. 05

    Wiring issue between terminal block and control board

    Wiring / connection

    Damaged or improperly connected wiring between the dryer's power terminal block and the control board can cause the board to receive inaccurate voltage signals. Inspect internal wiring harness connections.

See the test procedure for each cause

Frequently asked questions about H2/B2

What does H2/B2 mean on a Electrolux dryer?
The H2/B2 code means the dryer's control board has detected that the incoming power supply voltage is too high, exceeding the acceptable operating range. This is a power supply fault, not a mechanical or heating component failure. The dryer triggers this code to protect itself from overvoltage damage. Diagnosis should begin by measuring the actual line voltage at the outlet or terminal block.
Can I fix the H2/B2 error myself?
Some causes, such as a tripped breaker or a slightly elevated utility voltage, may be straightforward to identify, but working with 240V wiring carries serious safety risks. Checking the outlet voltage with a voltmeter is a reasonable first step for a knowledgeable DIYer. However, any work involving the home's wiring, panel, or internal dryer wiring should be performed by a qualified technician or electrician.
Is it safe to keep using my Electrolux dryer with the H2/B2 error?
You should not continue operating the dryer while the H2/B2 error is active. Persistently high voltage can damage the control board, motor, and heating components over time. The dryer's control system displays this fault specifically to alert you that operating conditions are unsafe. Resolve the power supply issue before resuming normal use.
Will resetting the dryer clear the H2/B2 error code?
Resetting the dryer by unplugging it or cycling the breaker may temporarily clear the error display, but the fault will return if the underlying overvoltage condition has not been corrected. A reset does not fix the root cause. The incoming line voltage must be measured and any wiring or supply issues resolved before the code will stay cleared.
How much does it cost to repair an H2/B2 error on an Electrolux dryer?
Repair costs vary significantly depending on the root cause. If the issue is a faulty outlet or loose wiring connection, electrician service calls typically range from around $75 to $200. If the dryer's control board requires replacement, parts and labor combined can range from approximately $150 to $400 or more depending on the model and local labor rates.

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