Remove the wires from the terminal and discharge the capacitor using the instructions included with your furnace.
Furnace blower capacitor test.
If you re concerned that your furnace capacitor isn t operating properly you can test it by following a few simple steps.
Remove the blower housing inside the furnace to access the capacitor.
The capacitor will still hold a charge even without power.
Do not do an under load test on blower capacitors due to the risk of the meter leads around a spinning blower wheel.
Decide if under load or bench testing is best.
Bench or under load test.
A furnace usually uses a run capacitor to maintain a relatively constant voltage supply to the blower motor.
If the system is currently running then an under load test may be best.