Pool and Spa
Ask a Pool and Spa Question, Get an Answer ASAP!
Hello and welcome to JustAnswer! This is James, I'm a Pool & Spa Engineer with over 20 years of experience, and I'll be assisting you today.
These budget inflatable hot tubs are designed as consumables, so when they develop a faulty they just send a new pump out. Since its only 6 weeks old I would contact the retailer you purchased it from and normally most will handle returns \ refunds rather than having to go to the manufacture as its less than 2 months old.
The HL fault code relates to the pump not detecting the flow of water, so where you have done a back flush using a hose pipe, check the filter is not blocked then that leaves you with a fault on the pump, seal or flow sensor, none of which are really suitable for DIY repair.