Pool and Spa
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If you're hearing it humming, then it's either seized up, out it could have a bad start capacitor. The only way to determine which one is the problem is to open up the cabinet to get to the pump. If I see a pic of it I might be able to walk you through it. Sometimes the pump will have to be removed from the spa to test it.
You'll normally have over pump that just heats the water on low speed and runs jets on high speed, this is on one half of the spa. The second pump runs there jets on the other half of the spa. That's why it usually helps to see a picture as all spa are plumbed differently.
Yeah that's a waterway executive pump. On the very back end of the motor is a cap right in the center of it. If you pop that cap off, you'll have access to the motor shaft. Usually a slot for a flat head screwdriver. If you can get to it, id like to see if it spins freely from the shaft. The start capacitor is under that large hump on the top of the motor if we have to check it out.