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58SU0A (Series 2 & 3): Troubleshooting Guide
QUICK REFERENCE INFORMATION
Flame Sensor Microamperage
Microamp Range:
0.5 to 6.0 microamps
Typical Reading:
4 to 6 microamps
Hot Surface Igniter Reading
The Silicon Nitride igniter in this furnace is not voltage sensitive and will work within the voltage range of 102 to 132-VAC. Hence, there is no voltage
regulation circuits on the furnace control board. A new Silicon Nitride igniter has a normal resistance range of 40 to 70 ohms at room temperature and is
relatively stable over the life of the igniter. The igniter resistance will increase with temperatures above room temperature.
Ohm reading of HSI @ 70°F: 40 to 70 ohms (resistance will remain
relatively stable over the life of the igniter).
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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