Robertshaw
Robertshaw 41-803 Hot Surface Igniter 120V 15 1/2 in lead
Silicon-nitride hot-surface igniter with 15 1/2 in leads for 120 V AC furnaces, rated to 392 °F insulation temperature
- TypeLearning Thermostats
- Silicon nitride element resists thermal shock up to 392 °F
- 15 1/2 in leads fit existing furnace wiring without splicing
- Flat-round tip matches OEM probe geometry for direct replacement
- 120 V AC rating suits standard residential heating systems
- Learning thermostat platform adapts to system cycles for reliable ignition
Hot Surface Igniter 41-803
The Robertshaw 41-803 is a 120V AC hot surface igniter built for gas-fired heating equipment. It uses a silicon nitride heating element that reaches ignition temperature quickly and resists thermal shock. The flat round tip and 15 1/2 in hardwired leads allow direct mounting in many OEM furnace and boiler designs. It serves as a direct OEM replacement part for compatible heating systems.
OEM replacement for worn igniters
This igniter replaces original equipment units that have cracked or developed high resistance after repeated heating cycles. Silicon nitride construction lasts longer than older silicon carbide designs under the same 120V supply. The upgrade is worth it when the existing igniter shows visible damage or causes delayed ignition faults. The 392 Degrees F lead insulation rating suits standard furnace compartments.
Hardwired 15 1/2 in leads for direct fit
The 15 1/2 in lead length and hardwired connection let the part install without adapters or splices in matched OEM brackets. A 2 in probe positions the flat round tip in the burner flame path for reliable ignition. Installers must verify the original mounting geometry and voltage match before fitting. The component frees up no additional space and requires no control-board changes.
Highlights
- Silicon nitride element resists thermal shock up to 392 °F
- 15 1/2 in leads fit existing furnace wiring without splicing
- Flat-round tip matches OEM probe geometry for direct replacement
- 120 V AC rating suits standard residential heating systems
- Learning thermostat platform adapts to system cycles for reliable ignition
Specifications
| Brand | ROBERTSHAW |
|---|---|
| Type | Learning Thermostats |
Questions about this item
Will the 15 1/2 in lead reach my furnace terminal block?
The 15 1/2 in lead provides enough length for most standard furnace terminal blocks; measure your existing igniter lead to confirm.
How do I install this hardwired 120V AC igniter without damaging the silicon nitride element?
Turn off power, disconnect the old igniter, connect the new leads with wire nuts, and avoid touching the silicon nitride probe with bare hands.
When should I replace this igniter if the 392 degree F insulation rating is exceeded?
Replace the igniter if the lead insulation shows cracking, discolouration, or if the furnace fails to light after the igniter glows.
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