Furnace Not Heating with No Error Codes: Where to Look: Revision history

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29 December 2025

  • curprev 17:4217:42, 29 December 2025‎ Roherehrpq talk contribs‎ 22,776 bytes +22,776‎ Created page with "<html><p> A furnace that won’t heat and won’t throw an error code unnerves homeowners and technicians alike. When the board flashes a diagnostic light or the thermostat shows a fault, you have a starting point. Silence from the controls suggests the problem lives in the gray areas: safety interlocks that reset themselves, a control that thinks everything is fine, or a subtle airflow or gas delivery issue that hasn’t tripped a hard fault. If you understand how a typ..."
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