Gas Furnace Limit Switch Troubleshooting: Symptoms, Testing & Replacement
5:55
YouTubehvacrepairguy
Gas Furnace Limit Switch Troubleshooting: Symptoms, Testing & Replacement
Is your furnace fan running constantly but blowing cold air? You likely have a faulty or tripped high limit switch. In this HVAC repair guide, we walk you through the step-by-step process of diagnosing, testing, and replacing a gas furnace limit switch. In this video, you will learn: How to identify diagnostic light codes (like the 4-flash red ...
467.9K viewsAug 11, 2011
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