Tempstar Hot Surface Igniter for TDE050B12B1 — Silicon Nitride HSI/Sensor Kit | Ships Today

Overview

This is the genuine OEM hot surface igniter and sensor kit (part #1009524) for the Tempstar TDE050B12B1 gas furnace. The igniter is the component that glows red-hot to ignite the gas burners on each heating cycle. This silicon-nitride-style HSI/sensor service kit is durable and resistant to thermal shock. When an igniter fails, the furnace blower may run without producing heat, you may hear repeated ignition attempts that lock out, or the unit short-cycles and throws an ignition-failure fault code. A cracked or worn igniter is one of the most common causes of no-heat calls on this furnace platform.

Specifications

Compatibility

Directly fits the Tempstar TDE050B12B1 gas furnace. This igniter/sensor kit is also used across many ICP-family furnaces (Heil, Comfortmaker, Day & Night, Arcoaire) that share the same burner assembly. Always confirm your part number before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, and shut off the gas. Verify zero voltage with a multimeter.
2. Access — Remove the furnace burner-compartment service panel.
3. Document — Photograph the igniter bracket and wire harness routing before disconnecting.
4. Remove — Unplug the igniter connector, remove the mounting screw(s), and carefully lift out the old igniter without touching the new element with bare fingers.
5. Install — Mount the new igniter in the same position, reconnect the harness per your photo, and reattach the sensor.
6. Test — Restore gas and power, then run a heat cycle and confirm the igniter glows and the burners light reliably.

Signs You Need a Replacement

• Furnace blower runs but produces no heat
• Repeated ignition attempts ending in lockout
• Visible cracks or pitting on the igniter element
• Ignition-failure or flame-sense fault codes

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.