What Is a Condensate Line?
The condensate line is the tubing that drains moisture produced by a high-efficiency furnace, or by an air conditioner's evaporator coil, safely out of the home. On high-efficiency furnaces, it carries away the water byproduct of extracting extra heat from exhaust gases.
Why It Matters to You
In the Western Suburbs of Chicago, a condensate line that drains fine on a warmer day can freeze solid overnight during a freeze-thaw cycle and back up, triggering a safety shutdown.
Practical Guidance
If your high-efficiency furnace shuts down during a cold snap, a frozen or blocked condensate line is a common, checkable cause before assuming a bigger failure.
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