A Rinnai 105000953 Spark Electrode/Ignitor initiates ignition within the unit so it can start and run with consistent heat output.
The spark electrode/ignitor generates the spark needed to ignite the burner, allowing the HVAC system to begin and maintain proper heating operation. Its design and construction matter because accurate spark delivery, durable materials and proper insulation support reliable ignition performance in heating and cooling equipment.
The spark electrode/ignitor may need to be replaced if the heating and cooling unit shows ignition failure, inconsistent startup or intermittent burner operation. You might notice physical signs such as cracks, corrosion or electrode wear and environmental signs may include moisture exposure, carbon buildup or heat-related damage that can affect performance.
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Parts Town allows you to return most new, unopened real OEM heating and cooling replacement parts within 90 days of delivery, so go to our Returns page and see if your order qualifies. Custom orders aren't typically eligible for cancellation or return.