Where the money goes
Part $15–$75Labor $75–$385Typical labor time: 0.5–1 hrs
You might need this if…
DIY difficulty: moderate•Motor hums but won't spin
•Slow blower startup
The part
Run capacitors help blower and inducer motors start. A failed capacitor causes hum-without-spin symptoms.
This is general information, not professional advice. Gas, electrical, and combustion repairs can be dangerous — when in doubt, call a licensed technician.