I have to take the blame, as I underestimate the effort to maintain a hottub.
that said, I moved into a house with a hotspring spa system, it was working 3 months ago. I was busy with other house repair work so I only adjusted the temp down to 80C and leave it unattended. When I checked it this week, the hotspa was half full of cold water, I drained the water, cleaned up the tub, replaced all 5 filters, however, it's just not heating up at all.
Model: hotspring spa Watkins Grandee GO (230V, 60Hz, 40A)
symptoms:
Control panel: Power button solid red, Ready button no light, no error code
Jets: all working fine, I see steady bubble from the bottom of the tub
Filter: the main filter was ready dirty when I removed it, replaced with all 5 new filters
Refill: I put the hose down into the main filter to fill up the tub
Control board: LIM OK solid green, HTR OK solid red
Heating component: I feel water is flowing in & out, but the tube is not warm at all
I did on/off breaker few time, removed the main filter and reset breaker, but as I said the heating component is not feeling warm at all, so I doubt it is working.
What else I should try? thanks a lot!
Andrew