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Small metal spark ignitor with ceramic insulator and wire connector

Rheem

Rheem AS39758 Spark Ignitor for G75MF G91MF G100MF

SKU CH-8SSM-CH87Q

Direct replacement spark ignitor for Rheem G75MF, G91MF and G100MF models

  • Main materialHAWA
  • Direct replacement for Rheem G75MF and G91MF models
  • Compatible with Rheem G100MF units for reliable ignition
  • Genuine Rheem AS39758 part ensures proper fit and function
  • Works with Vanguard brand equipment for versatile use
  • Matches manufacturer numbers 476261, 476285 and 478678

Rheem AS39758 Spark Ignitor

The Rheem AS39758 spark ignitor is a direct replacement component for Rheem and Vanguard commercial water heaters. It restores reliable ignition on compatible units without modification.

Fits G75MF G91MF G100MF models

This ignitor suits maintenance teams servicing the listed Rheem models. It does not fit other brands or model series, so buyers needing a different part number should look elsewhere.

Consistent ignition over repeated cycles

The ignitor delivers a stable spark each time the heater calls for heat, maintaining performance through continuous daily operation rather than only during brief test firings.

How it compares

Measured against everything we stock in Sinks & Pet Water Fountains, at today’s prices. Recalculated every night.

Price $101.99
Pricier than about 63% of the 200 comparable items (median $55.99).

Specifications

Product
Brand nameRHEEM
Size & build
Main materialHAWA

Questions about this item

Which Rheem water-heater models does the AS39758 spark ignitor fit?

The AS39758 spark ignitor fits Rheem models G75MF, G91MF and G100MF, corresponding to manufacturer numbers 476261, 478678 and 476285.

Will this ignitor work with a Vanguard-branded unit that uses the same G-series model numbers?

Yes, the supplier lists Vanguard alongside Rheem as compatible brands for the G75MF, G91MF and G100MF models.

How can I confirm the ignitor is firing correctly after installation?

Observe a steady spark at the ignitor tip during the ignition cycle and verify the main burner lights without delay.

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