Natural Gas Control Thermostat Hot Surface Ignitor

Rheem SP10972 Hot Surface Ignitor – Direct Replacement for Gas Water Heaters

The Rheem® SP10972 is a hot surface ignitor designed for use in select Rheem gas water heaters. This silicon nitride ignitor provides consistent ignition for the gas burner assembly, supporting efficient startup and reliable operation of the heating system. Engineered for high durability, it is suitable for applications requiring repeated thermal cycling.

Application and Functionality

This component functions as the ignition source in gas-fired water heaters, replacing worn or damaged ignitors within compatible Rheem models. The SP10972 is constructed to tolerate elevated operating temperatures and frequent use, maintaining proper ignition timing to support burner performance.

Key Product Features

• ✅ High Heat Tolerance – Built from silicon nitride material to handle repeated exposure to combustion temperatures.
• ✅ Consistent Spark-Free Ignition – Provides silent, surface-based heating to initiate combustion reliably.
• ✅ OEM Fit and Function – Designed specifically for compatibility with select Rheem gas water heater systems.
• ✅ Low Profile Design – Suitable for confined burner compartments with minimal clearance requirements.

Technical Specifications

• Model: SP10972
• Type: Hot Surface Ignitor (HIS-type)
• Material: Silicon nitride
• Application: Direct replacement for compatible Rheem gas water heaters
• Function: Ignites gas burner via surface heating element

Installation Considerations

Installation should be performed with power and gas shut off to the unit. The ignitor mounts using factory hardware and connects to the unit’s control board via wire leads. Proper handling is important to prevent damage to the ceramic heating element. For safety and compliance, installation is best performed by qualified technicians familiar with gas appliance servicing.

Contractor Guidance

The SP10972 is a standard service part for maintenance and repair of Rheem water heaters equipped with hot surface ignition. It is frequently used in field replacements where ignition failure has occurred. Verify model compatibility before installation and observe manufacturer guidelines to ensure system performance.