have a Lennox heat pump that had the fan motor replaced about three years ago. A month ago the fan stopped turning and was making a whining sound. Called repair person but fan had started working again. Repair guy said it was a bad capacitor and replaced it. Woke up this morning with same problem don't want to pay again for it to only work a month. Looking at wiring diagram it shows one dual capacitor but there were three single capacitors installed. Two wired together and one by itself going to fan motor. The one going to fan motor is the one replaced last month. Have gone out and purchased a new dual capaitor and tried to wire to original wiring diagram however there are two brown wires on the fan motor instead of one purple. Have tried wiring with both wires to F on capacitor and with just one brown to F on capacitor both does same as before with whining sound from fan but not turning. Fan blades spin freely without power but hard to turn when power is on.