Almost daily we are asked, “what is the difference between a solenoid and a coil?” It doesn't help that Google’s definition of each is vague:
Solenoid: A coil wound into a tightly packed helix.
Coil: A length of something wound or arranged in a spiral or sequence of rings.
When your pump isn't working you need to know the difference. The information below will help you differentiate between your solenoid and coil.
What is a solenoid? A solenoid is a contact. So, when you put power to the activator the contacts, contact and 12V run through the solenoid.
What is a coil? A coil is a magnet. Applying electricity magnetizes the coil and opens the valve.
What is the difference between them? The difference between a solenoid and a coil is one is a contact with mechanical parts inside. A coil is a magnet.
Where are solenoids located? The solenoid is mounted on the pump motor and connects to the motor post. The solenoid has two posts, which connect your hot cables.
Where are coils located? The coil is located on the pump’s valve. The coil has one post, which connects the remote.
Where are solenoids used? Solenoids are used on many Pierce products like bale spikes, dump kits and winches.
Where are coils used? Coils are used on pumps.
How do I test a solenoid? For instructions, click here.
How do I test a coil? For instructions, click here.
For replacement solenoids or coils click here.