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The symptoms of a blown HVAC fuse include the system not turning on, no air coming out of the vents, and the thermostat not responding.

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5mo ago

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To determine if an AC fuse is blown, visually inspect the fuse for a break in the metal filament inside. Additionally, use a multimeter to test for continuity across the fuse. If there is no continuity, the fuse is likely blown and needs to be replaced.