Hisense Range Error Code Err 007

Err 007 on a Hisense range indicates a failure in the power board relay supply circuit. The power board (PB) is responsible for distributing electrical power to the oven's heating elements and control systems through a series of onboard relays. When the relay supply voltage drops out, becomes unstable, or fails to reach the relays due to a fault on the board itself, the control system detects this condition and triggers Err 007. As a safety response, all oven functions are immediately stopped to prevent uncontrolled heating or electrical damage.

The three primary failure points for this error are the power board's internal power supply circuit, the relays mounted on the power board, and the power board as a complete assembly. A failed internal power supply on the PB means the relays are not receiving the voltage needed to switch properly. Damaged or welded relay contacts can also cause the board to report a supply fault, as the control logic monitors relay feedback signals. In either case, the board cannot reliably control the oven's heating circuits.

Because the fault is internal to the power board and not typically caused by an external wiring harness issue, the recommended first diagnostic step is direct replacement of the power board. Before replacing, a technician should visually inspect the board for signs of burn marks, swollen capacitors, or scorched relay bodies, which can confirm the fault source. If visible damage is present on the relays specifically, the board must still be replaced as a unit since the relays are soldered components not serviced separately in the field.