vita spa blown fuses

[oldtown]

i have a vita spa 2007 that blew a fuse last week, after a long search i found the right one and replaced it.  So when i got in it last night the temp had not risen all the way or i did not set it high enough which i thought i did.  one of the 2 stage pumps would only come on high.  i ran a diagnostic test and i got a REL error.  i ran the test again and i got an F2 code error.  so this tells me that is probably the reason for the original blown fuse.
#1 is the relay bad?  how do i test it? #2 is the pump starting to fail?   please reply before my wife makes me call the technician.  thanks DA

[Chas]

I'm with your wife.

[Dr. Spa™ Ret.]

Is your wife aware of this?

[Chas]

[wmccall]

Welcome to the forum.  I am a technical person my nature with a lot of troubleshooting experience, none of which is with hot tubs.    Over the past 9 years I have certainly heard of plenty of relay failures here.  Have you found the relay?  It is removable? Can you see any signs of burning around the relay or its socket?

[Chas]

First, let me make it clear that this sounds like one of those times when you would be better off getting a pro to fix this - or at least troubleshoot it.

But having said that, I would proceed like this:

Disconnect the pump in question from the control system.

Test the output of the relay(s) -
   Be sure it IS sending power to the pump,
   Be sure it only outputs to ONE speed at a time.
   Be sure it is not stuck 'on' for either speed.

Then test the pump -
   Put power to the unit and see that both speeds work, one at a time.
   Don't run the pump dry.

And go from there.

HTH