Viking Range Error Code 2 flashes every 4 seconds (DSI)

The 2 flashes every 4 seconds pattern on a Viking range indicates a control fault originating within the DSI (Direct Spark Ignition) module. The DSI module is the electronic brain responsible for sequencing the gas ignition process: it energizes the spark igniter, monitors for flame presence via a flame-sensing electrode, and controls the gas valve. When the module detects an internal fault in its own control circuitry, rather than an external component failure, it signals this specific flash code to alert the technician that the module itself has failed or is operating outside normal parameters.

This type of fault is distinct from ignition failures caused by a dirty flame sensor, a failed igniter, or a wiring issue. A DSI control fault points directly to the module's internal logic or components. Causes can include voltage spikes or surges that damage the module's circuitry, moisture or contamination that has reached the module's board, or simple electronic component failure due to age and heat cycling over time. Because the fault is internal to the module, external wiring and component checks are unlikely to resolve it.

The recommended first step is a power cycle, which clears any transient or software-related faults that may have caused a false trigger. If the 2-flash code returns after restoring power, the DSI module has a confirmed internal fault and requires replacement. Continuing to operate the range with a faulted DSI module is not advisable, as the module controls the gas valve sequencing and a failed module may not reliably shut off gas flow during an ignition failure.