Could a failing Hot Surface Igniter cause the YORK TM9V to have symptom: Not Glowing?

The igniter is a resistive heating element that becomes brittle over time. A microscopic fracture in the ceramic or silicon nitride structure interrupts the electrical path, resulting in an open circuit. Without a continuous path for current, the element cannot reach the temperature required for thermionic emission and visible glow.

Could a failing Integrated Furnace Control Board cause the YORK TM9V to have symptom: Not Glowing?

The control board utilizes an electromechanical relay to send 120V to the igniter. If the relay contacts become pitted or the logic circuit fails to detect that safety prerequisites (like pressure switch closure) are met, it will not engage the ignition circuit, leaving the igniter cold.

Could a failing Inducer Pressure Switch cause the YORK TM9V to have symptom: Not Glowing?

This furnace requires a specific negative pressure to be sensed by the diaphragm switch before the ignition sequence proceeds. If the switch fails to close due to a ruptured internal diaphragm or a blocked pneumatic port, the control board will never initiate the 'igniter warm-up' phase.

What is the most likely root cause for a YORK TM9V with symptom: Not Glowing?

The igniter is a resistive heating element that becomes brittle over time. A microscopic fracture in the ceramic or silicon nitride structure interrupts the electrical path, resulting in an open circuit. Without a continuous path for current, the element cannot reach the temperature required for thermionic emission and visible glow.

YORK TM9V Not Glowing

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CONF	DIAGNOSIS	ACTION
90% CONF	Hot Surface Igniter The igniter is a resistive heating element that becomes brittle over time. A microscopic fracture in the ceramic or silicon nitride structure interrupts the electrical path, resulting in an open circuit. Without a continuous path for current, the element cannot reach the temperature required for thermionic emission and visible glow. SKU: S1-02545231000	VIEW ON AMAZON #CommissionsEarned
7% CONF	Integrated Furnace Control Board The control board utilizes an electromechanical relay to send 120V to the igniter. If the relay contacts become pitted or the logic circuit fails to detect that safety prerequisites (like pressure switch closure) are met, it will not engage the ignition circuit, leaving the igniter cold. SKU: S1-33103010000	VIEW ON AMAZON #CommissionsEarned
3% CONF	Inducer Pressure Switch This furnace requires a specific negative pressure to be sensed by the diaphragm switch before the ignition sequence proceeds. If the switch fails to close due to a ruptured internal diaphragm or a blocked pneumatic port, the control board will never initiate the 'igniter warm-up' phase.	VIEW ON AMAZON #CommissionsEarned

DIY Repair Guide

Watch exactly how to replace the Hot Surface Igniter.

// NOTICE: This report is generated by an Agentic AI Engineer utilizing probabilistic modeling.

PartSniper is an automated parts recommender service. AI-generated results may not be correct. This data is not a substitute for professional engineering advice or manual inspection. Always verify part compatibility and disconnect power before any repair. PartSniper is not liable for inaccuracies, injury, or damage.

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YORK TM9V Not Glowing

DIY Repair Guide