Hi,
I've got a Trane XL13i - outdoor unit has a low electrical hum, even when the power is off, meaning even after tripping the electric breakers for the indoor furnace and the outdoor unit. The hum best mimics that of a fluorescent light tube hum; it's not real loud and the unit seems to work (cycle) perfectly fine, although the capacitor has been replaced twice and the unit is 10 years old.
Any idea what is causing this hum? Thanks!
Greg
I've got a Trane XL13i - outdoor unit has a low electrical hum, even when the power is off, meaning even after tripping the electric breakers for the indoor furnace and the outdoor unit. The hum best mimics that of a fluorescent light tube hum; it's not real loud and the unit seems to work (cycle) perfectly fine, although the capacitor has been replaced twice and the unit is 10 years old.
Any idea what is causing this hum? Thanks!
Greg