high efficiency gas furnace problems

10 Common Issues With High-Efficiency Furnaces Hunker. Web  1. Gas Line Is Off. If the gas furnace tries to start up but doesn't produce any heat, check to make sure it's receiving gas. Gas lines have on/off valves just like water lines. If the gas valve is perpendicular to the pipe so that it looks like a "T," the gas is off. Turn.

10 Common Issues With High-Efficiency Furnaces Hunker
10 Common Issues With High-Efficiency Furnaces Hunker from img.hunkercdn.com

Web  A high-efficiency gas furnace, especially a condensing furnace, often requires specialized venting due to its lower heat output and higher condensation.

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