YORK TM9V Not Glowing
| CONF | DIAGNOSIS | PART MATCH | ACTION |
|---|---|---|---|
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90%
CONF
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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
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VIEW ON AMAZON
#CommissionsEarned
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7%
CONF
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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
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VIEW ON AMAZON
#CommissionsEarned
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3%
CONF
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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.
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VIEW ON AMAZON
#CommissionsEarned
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DIY Repair Guide
Watch exactly how to replace the Hot Surface Igniter.