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Error code reference

Hisense Range Error Code Err 008

Overheating of power board detected when PB NTC sensor reads above 230°F/100°C or damaged NTC sensor on PB…

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Overheating of power board detected when PB NTC sensor reads above 230°F/100°C or damaged NTC sensor on PB; all oven functions stop.

First step from the service manual

With a heating gun heat resistor R100 and resistor R145.

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

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
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What Err 008 means on a Hisense range

Err 008 on a Hisense range indicates that the power board (PB) has reached a critically high temperature, specifically when the NTC (Negative Temperature Coefficient) thermistor mounted on the power board reads above 230°F (100°C). When this threshold is exceeded, the control system immediately shuts down all oven functions as a protective measure to prevent component damage or fire risk. The NTC sensor works by changing its electrical resistance in response to temperature, and the control board monitors this resistance continuously to track power board thermal conditions.

The fault can originate from two distinct problems: actual overheating of the power board due to inadequate cooling, blocked ventilation, or a failing component causing excess heat generation, or a damaged NTC sensor that is sending an incorrect signal to the control board even when the board is at a normal operating temperature. Distinguishing between these two root causes is the critical first step in diagnosis.

The recommended first diagnostic step involves using a heating gun to apply heat directly to resistors R100 and R145 on the power board. This targeted test helps determine whether those specific resistors are functioning correctly or have drifted out of specification due to heat stress or component failure. A resistor that has been damaged by overheating may measure within tolerance at room temperature but behave erratically under thermal stress, making the heat gun test a practical way to replicate failure conditions and confirm the fault source.

Source: manufacturer service documentation.

Common causes of Err 008

  1. 01

    Damaged or failed NTC thermistor on power board

    Part replacement

    The NTC sensor on the power board can fail or degrade, causing it to report temperatures above 230°F even when the board is cool. Check the sensor's resistance output against expected values and inspect for visible damage or cracked solder joints.

  2. 02

    Blocked or restricted ventilation around the power board

    Wiring / connection

    If the ventilation path around the power board is obstructed by debris, grease buildup, or improper installation, heat cannot dissipate properly and the board will genuinely overheat. Inspect all vents and internal airflow channels for blockages.

  3. 03

    Failed or degraded resistors R100 or R145

    Part replacement

    Resistors R100 and R145 on the power board are specifically identified as suspect components in this fault. These resistors can fail under sustained heat stress, causing abnormal readings or contributing to board-level overheating. Testing with a heating gun can reveal intermittent failures not visible at room temperature.

  4. 04

    Power board component failure causing excess heat generation

    Part replacement

    A shorted or degraded component elsewhere on the power board can cause the board itself to generate excessive heat during operation, triggering the NTC sensor legitimately. If the board shows signs of discoloration, burnt smell, or visible component damage, board replacement is likely required.

  5. 05

    Faulty wiring or poor connection to NTC sensor

    Wiring / connection

    A loose, corroded, or damaged connector between the NTC thermistor and the control board can cause erratic resistance readings that the system interprets as an overtemperature condition. Inspect the wiring harness and connector pins at the power board NTC circuit.

See the test procedure for each cause

Frequently asked questions about Err 008

What does Err 008 mean on a Hisense range?
Err 008 means the range has detected that the power board temperature has exceeded 230°F (100°C) based on a reading from the NTC thermistor mounted on the power board. As a safety response, the appliance immediately stops all oven functions until the condition is resolved. The fault may indicate actual board overheating or a failed NTC sensor sending a false high-temperature signal.
Can I fix Err 008 on my Hisense range myself?
Some steps, such as clearing obstructions from ventilation areas and inspecting wiring connections to the NTC sensor, can be performed by a knowledgeable DIYer. However, diagnosing failed resistors R100 and R145 with a heating gun or testing the NTC sensor's resistance output requires comfort working with electronics and live appliance components. If the power board itself needs replacement, a qualified technician is strongly recommended.
Is it safe to use my Hisense range when Err 008 is displayed?
No. When Err 008 is active, the range has already disabled all oven functions as a safety precaution, and you should not attempt to override or bypass this shutdown. Continued operation with a genuinely overheating power board could cause component damage or create a fire hazard. Do not use the appliance until the fault has been properly diagnosed and repaired.
Will resetting the range clear the Err 008 code?
A power reset by unplugging the range or cycling the breaker may temporarily clear the error code, but the fault will return if the underlying cause has not been corrected. If the NTC sensor is damaged or the power board is genuinely overheating, the code will reappear as soon as the board reaches operating temperature again. A reset alone is not a fix.
How much does it cost to repair Err 008 on a Hisense range?
Repair costs vary depending on the root cause. If only the NTC thermistor or individual resistors need replacement, parts costs are typically modest, generally in the range of $10 to $50 for components. If the entire power board requires replacement, parts alone can range from $80 to $250 or more, and adding professional labor will increase the total. Getting a diagnostic from a technician first can help determine whether a targeted repair or full board replacement is needed.

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