I’m having some trouble troubleshooting my whirlpool tub. I can turn the jets on and all you hear is a humming with no actual jet function. Nothing comes out of the jets. I have accessed the pump and the fan pump is working/not jammed. Plugs and switches are all good as well as far as I can tell. What else could be the issue? Could it be clogged on the inside preventing water from circulating? Any help is much appreciated. Thank you!