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Testing mode: This site is still experimental. I’m testing and improving the content and tools.

Interactive tool

Room Temperature Troubleshooter

Why is that one room in your house always freezing? Check common forced-air heating symptoms and decide what to investigate next.

This tool covers forced-air heating, not every heating system. If you smell gas, leave the building and contact the gas emergency service from outside. For a CO alarm, leave and call emergency services.

Source: DOE HVAC guidance. A result is a next check, not a confirmed diagnosis.

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Check the symptoms.

Start with a few checks in the affected room.