YORK TM9V Flashing Red Light
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
|
86%
CONF
|
Flame Sensor
The flame sensor utilizes flame rectification to verify combustion by conducting a microamp DC signal through the ions in the flame. Over time, silica and carbon deposits form an insulating layer on the stainless steel rod, increasing resistance until the control board can no longer detect the flame, triggering a safety lockout (Code 7 or 8). Cleaning or replacing the rod restores the electrical path required for the flame-proving circuit.
SKU: S1-02537499000
|
|
|
8%
CONF
|
Furnace Pressure Switch
In high-efficiency condensing units like the TM9V, the pressure switch monitors the inducer fan's ability to clear flue gases and the integrity of the secondary heat exchanger's drainage. Moisture from combustion can clog the condensate trap or collector box ports, preventing the diaphragm from closing or causing it to trip during operation (Code 3 or 6). This part failure or restriction prevents the gas valve from energizing as a primary safety precaution.
|
|
|
6%
CONF
|
Hot Surface Igniter
The silicon nitride igniter undergoes extreme thermal stress, cycling from ambient temperature to over 2,500°F within seconds. Over several heating seasons, the ceramic material develops micro-fractures that increase internal electrical resistance, eventually preventing it from reaching the auto-ignition temperature of the gas-air mixture or resulting in a completely open circuit (Code 12).
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DIY Repair Guide
Watch exactly how to replace the Flame Sensor.
// 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.