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Error code reference

Hisense Range Error Code Err 015

Zero cross failure on power board due to Zero-Cross failure on PB or damaged PB; all oven functions stop.

Hisense codesHisense range codes

Zero cross failure on power board due to Zero-Cross failure on PB or damaged PB; all oven functions stop.

First step from the service manual

Disconnect OP1 pin 4 from power board for additional ZC tests.

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

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What Err 015 means on a Hisense range

Err 015 on a Hisense range indicates a zero-cross detection failure originating on the power board. The zero-cross signal is a reference point in the AC power cycle where the sine wave passes through zero volts, transitioning between positive and negative phases. The main control board uses this signal to precisely time relay switching, heating element activation, and other AC-driven functions. Without a reliable zero-cross signal, the control board cannot safely or accurately manage oven operations, so all oven functions are disabled as a protective response.

The fault is attributed to either a failure in the zero-cross detection circuit on the power board itself or physical damage to the power board. The zero-cross circuitry typically includes a small network of resistors, optocouplers, or dedicated ICs that sample the incoming AC line and generate a logic-level pulse for the control board. If any of these components fail, short, or if the board sustains burn damage or cracked traces, the signal will be absent or corrupt, triggering Err 015.

The first diagnostic step is to disconnect the OP1 pin 4 connector from the power board. This isolates the zero-cross signal line so technicians can perform additional tests to determine whether the fault lies in the wiring and connected components upstream of the board or within the power board circuitry itself. If the error clears or changes behavior after disconnecting OP1 pin 4, the issue may involve wiring or an external component feeding that circuit. If the board shows no output on the zero-cross line under test conditions, the power board likely requires replacement.

Source: manufacturer service documentation.

Common causes of Err 015

  1. 01

    Failed power board zero-cross circuit

    Part replacement

    The zero-cross detection circuit on the power board has failed internally, often due to a failed optocoupler or burned resistor within that circuit. This is the most common cause and is confirmed when the power board produces no zero-cross output signal during testing.

  2. 02

    Physically damaged power board

    Part replacement

    Burn marks, cracked solder joints, or damaged traces on the power board can disrupt the zero-cross signal path. Inspect the board visually under good lighting for discoloration, charring, or broken traces near the zero-cross circuit area.

  3. 03

    Wiring fault on OP1 pin 4 connector

    Wiring / connection

    A loose, corroded, or broken connection at the OP1 pin 4 connector between the power board and the control board can interrupt the zero-cross signal. Disconnect and inspect the connector for bent pins, corrosion, or damaged wiring insulation.

  4. 04

    Incoming AC power irregularity

    Wiring / connection

    Severe voltage fluctuations or a compromised neutral conductor in the household supply can distort the AC sine wave enough to prevent reliable zero-cross detection. Check line voltage at the range terminal block with a multimeter to rule this out.

See the test procedure for each cause

Frequently asked questions about Err 015

What does Err 015 mean on a Hisense range?
Err 015 indicates a zero-cross detection failure on the power board of your Hisense range. The zero-cross signal is used by the control board to time oven functions, and when it is absent or corrupted, all oven operations shut down. The fault points to either a failed zero-cross circuit on the power board or physical damage to the board itself.
Can I fix Err 015 on my Hisense range myself?
Some basic checks, such as inspecting the OP1 pin 4 connector for loose or corroded contacts, can be performed by a knowledgeable DIYer after disconnecting power to the range. However, diagnosing and replacing the power board involves working with high-voltage AC components, which carries serious shock risk. If you are not experienced with appliance electronics, this repair is best left to a qualified technician.
Is it safe to use my Hisense range while Err 015 is displayed?
No. When Err 015 is active, the range disables all oven functions as a protective measure because the control board cannot properly time or manage heating operations without the zero-cross signal. Attempting to bypass or ignore this fault and continue using the oven is not safe and could cause uncontrolled heating behavior.
Will resetting my Hisense range clear Err 015?
A power reset by unplugging the range or cycling the circuit breaker for a few minutes may temporarily clear the display, but Err 015 will return if the underlying power board fault has not been repaired. The zero-cross failure is a hardware issue, and no amount of resetting will resolve a failed circuit or damaged board.
How much does it cost to repair Err 015 on a Hisense range?
Repair costs depend on whether the issue is a wiring connection problem or a failed power board. A wiring fix may involve minimal cost if no parts are needed. Power board replacement typically costs in the range of $150 to $400 or more depending on parts availability and labor rates in your area. Getting a diagnostic assessment from a technician before committing to a repair is advisable.

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