Glossary
Equipment
Heat exchanger
The sealed metal component inside a gas furnace where combustion heat transfers to the air blown through your ducts, keeping exhaust gases separate from the air you breathe.
Why it matters for your home
A cracked heat exchanger can let carbon monoxide into your home's air, which is why it's one of the few failures where replacement is the honest answer almost every time. It's also why annual furnace inspections matter: the crack is found with an inspection camera, not from the thermostat. Ask to see the evidence before accepting the diagnosis, from us or anyone else.
Related terms
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Swiss Air services across O'Fallon and the St. Louis metro
Air conditioning repair & installation Symptoms, repair process, and full cooling scope. Furnace & heating service Repair, replacement, and heat pumps for Missouri winters. 24/7 emergency AC repair Nights, weekends, and holidays across the metro. HVAC service areas St. Charles County, St. Louis City and County.
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