- New
The Dometic/Atwood 91606 spark probe service kit is a replacement ignition component for compatible RV water heaters equipped with electronic ignition. The assembly produces the spark needed to ignite the burner and includes the probe used by the ignition system. This is the old-style version with a post-style connection. It is listed for selected Atwood models, including GCH6-4E, GCH6-6E, GC6A-7E, GH6-3E, GH6-4E and GH6-6E. Check the water heater model and connector style before ordering. The newer 93868 assembly is listed as a replacement for the older 91606.