Sunray uses piezoelectric or electronic spark igniters. The sends a high-voltage pulse to the ceramic igniter near each burner. If you hear clicking but no flame, the igniter may be cracked, dirty, or the spark module may have failed.
Finding is essential for maintaining these classic units. Since Sunray was eventually absorbed by Maytag and then Whirlpool, many replacement components are now sourced through these parent brands. Common Sunray Cooktop Replacement Parts sunray cooktop parts