I recently had the same problem with my hot tub. I called H&L Tub Repair and ended up getting some free advice (sadly that didn't pan out, but it was a long shot anyhow). They came over, had a look, had an estimate, set a time for the repair and were in and out in no time with not a single problem since.
Their FB page:
https://www.facebook.com/HL-tub-repair-635949183143829/