Furnace Not Heating Because of Limit Switch Triggers: Fixes 54180: Revision history

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30 December 2025

  • curprev 11:3111:31, 30 December 2025‎ Erwinejmmt talk contribs‎ 23,174 bytes +23,174‎ Created page with "<html><p> When a furnace refuses to heat and the blower runs without delivering warm air, the high limit switch often sits at the center of the story. It is not an obscure part, and it is not there to frustrate you. The limit switch protects the heat exchanger from overheating by cutting burners when the supply air gets too hot. It is a safety device first, a symptom messenger second. If your furnace keeps tripping the limit and locking out, the switch may be doing its j..."
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