2 speed motor runs on low, hums on high issue

[Racingcows]

I have a master spa with an issue of the 2 speed motor humming when the high speed is selected. I replaced the motor, problem is unchanged. Any ideas on what to check? I have been thi king relay but I hear one click wheb the button is pushed
PoolMath

 

[Texas Splash]

RC, welcome! I see your post has been sitting for a few days now with no reply. The high-speed issue is a bit beyond me, but someone like @JamesW may be able to help next time he's online.

 

[Bama Rambler]

Sounds like the contacts on the high speed relay are burnt.
Can you post the model of the spa as well as the display and control boards?