Carrier Furnace Repair: Costs, Model-Specific Issues & Expert Service

Carrier is one of the most widely installed furnace brands in the US. While they're generally reliable, certain models have known issues.

Carrier Infinity Series

The Infinity series is Carrier's premium line with variable-speed blowers and modulating gas valves. Common issues include:

• Control board failures ($300–$1,200) — The Infinity control is a sophisticated electronic module that can fail, especially after power surges. A whole-house surge protector ($150–$300 installed) is recommended.
• Inducer motor issues ($250–$1,500) — The variable-speed inducer motor is more complex and expensive than standard models.
• Communication errors — The Infinity system uses a proprietary communication protocol between the thermostat and furnace. Wiring or connection issues can cause intermittent failures.

Carrier Performance and Comfort Series

These mid-range and entry-level models share many components with other Carrier-manufactured brands (Bryant, Payne). Common repairs include:

• Ignitor failure ($150–$400) — Hot surface ignitors have a typical lifespan of 3–7 years across all Carrier models.
• Pressure switch issues ($150–$350) — Often caused by a blocked condensate drain or failing inducer motor rather than the switch itself.
• Flame sensor carbon buildup ($75–$250) — The most routine repair across all models.

Carrier Weathermaker

An older residential line that's still in many homes. Key issues:

• Draft inducer motor — Known for premature failure in some Weathermaker 9200 models
• Heat exchanger — Secondary heat exchangers on condensing Weathermaker models can develop leaks after 12–18 years. A heat exchanger replacement is one of the most expensive furnace repairs and often triggers a repair-vs-replace decision.