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Straight metal probe with bracket, 24 in length

Robertshaw

Robertshaw 1751-729 Ignitor/Sensor Bracket Assembly 24 in

SKU CH-YS9H-0DW62

Universal flame-sensor bracket with 24 in probe and lead for LP or natural-gas spark intermittent-pilot systems

  • Product typeLearning Thermostats
  • Universal bracket fits multiple HVAC brands
  • 24 in probe reaches deep burner assemblies
  • Straight tip aligns with pilot flame path
  • Hardwired lead simplifies field installation
  • Compatible with both LP and natural gas systems

Robertshaw 1751-729 Flame Sensor

The Robertshaw 1751-729 is a universal flame sensor designed as a replacement component for HVAC systems using spark intermittent pilot ignition. It suits technicians and property owners maintaining gas-fired equipment that requires a reliable flame-detection probe. The assembly fits a wide range of brands and series without brand-specific modification.

24 in probe and lead for standard reach

The straight probe tip extends 24 in with a matching 24 in hardwired lead, giving enough length for most typical burner compartments. Installations with deeper or unusually routed burner assemblies may find the fixed length insufficient, requiring a different probe geometry or extended wiring not provided here.

Universal bracket simplifies mounting

The included universal bracket allows the sensor to be secured in varied burner layouts without fabricating custom mounts. No additional software, connectors or calibration tools are bundled, so the installer must supply appropriate wiring terminations and verify compatibility with the specific control module.

How it compares

Measured against everything we stock in Thermostats & Thermostat Accessories, at today’s prices. Recalculated every night.

Price $25.99
Cheaper than about 78% of the 286 comparable items (median $78.49).

Specifications

Product
Brand nameROBERTSHAW
Product typeLearning Thermostats

Questions about this item

Will the 24 in probe on this 1751-729 bracket reach the pilot burner on my older furnace?

The probe length is 24 in with a straight tip angle and universal bracket, so it fits many intermittent-pilot systems; measure your existing probe to confirm reach.

How can I verify the flame sensor is operating correctly after installation?

With the furnace running, measure microamp current through the sensor lead; a steady reading above the manufacturer's minimum proves the 24 in probe is sensing flame reliably.

Does the box include mounting screws or wire connectors for the hardwired connection?

The assembly supplies the 24 in probe, universal bracket and hardwired lead; mounting hardware and wire nuts are not included and must be sourced separately.

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