Hi. I have a 2006 Cal Spa (model# M-06-v800-42). Been working fine the last couple years until the few times I've refilled it.
Now, anytime the circulation pump tries to kick on automatically, it just hum's for a few seconds, then stops with a message code "dy". BUT if I'm present when this happens, I can quickly turn the jets on and immediately turn the jets back off, the circulation pump works fine, until the next time.
I'm lost as to what I can do to fix this. Hope you can help! TY