Tempstar Hot Surface Igniter for T9MPV125L20A3 — Igniter/Sensor Kit | Ships Today

Overview

This genuine OEM hot surface igniter and sensor kit (part number 1009524) is the ignition source for the Tempstar T9MPV125L20A3 gas furnace. On a call for heat, the control board energizes the igniter; it glows red-hot to ignite the gas at the burners, and the integrated sensor confirms flame so the gas valve stays open. Hot surface igniters are brittle and degrade with every heating cycle. A cracked or worn igniter is one of the most common causes of no-heat calls — the furnace will run the inducer and attempt ignition, then lock out after several failed tries.

Specifications

Compatibility

Direct OEM replacement for the Tempstar T9MPV125L20A3 modulating gas furnace. The 1009524 igniter/sensor kit is used across ICP-family furnaces (Tempstar, Heil, Comfortmaker, Arcoaire) that share the same ignition platform. Verify the part number on your existing igniter before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the burner compartment access panel.
3. Document — Photograph the igniter mounting position and wire routing before disconnecting.
4. Remove — Unplug the igniter harness and remove the mounting screw(s); handle the old igniter only by its ceramic base.
5. Install — Mount the new igniter without touching the element with bare fingers, then reconnect the harness.
6. Test — Restore power, initiate a heat call, and confirm the igniter glows and the burners light on the first try.

Signs You Need a Replacement

• Furnace tries to ignite, then locks out with no heat.
• Igniter shows visible cracks, blistering, or no longer glows.
• Short-cycling on ignition or repeated retry sequences.
• Flame fails to establish or sense after ignition.

Shipping & Returns

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