This is such a common problem....
I see it so often, customers come into my store looking for replacement 'Parts' for components, where there are NONE. Mainly Pumps, but closely now followed by Heaters, since they started to mass produce spas out of China.
Consumers purchase these Toy spas online, in big box stores like Target, or any of the "X-Mart" (you fill in the X) type of stores and hope they can enjoy, which they should and 'Do', but for only a short time in most cases! This is unfortunate! For everyone all around! Please, don't get me wrong - I am not trying to be facetious here... But in this case, especially with products like this... The old adage can not be more spot on, 'you get what you pay for'. So Sorry!
What I have suggested to many people, some were successful at receiving satisfaction and others, sadly no. But I suggest - SQUEAK!!!! The squeaking Wheel, gets oiled? In most cases.
Maybe you get a replacement, and maybe get a discount on a replacement part, or maybe they say nothing?
If I ever get my hands on one of these failed units, I would tear into it, and try to come up with a work around repair that would modify this unit to be repairable! Vs. customers only option with Intex, is to purchase a new Power Center. Such a sad state : (
and then I would share with others.
Good Luck to you, I hope you are in Hot Water, soon .