davohilts Posted February 17, 2013 Report Share Posted February 17, 2013 Hello, I've been fighting with my spa over no heat for a couple of months. I have just bought new filters as my old ones were past their prime. I have 3 filters and it is a 120 volt model with an ozoneator which sends bubbles coming up thru the drain cover on the bottom. The spa stops heating with a flashing light but the circulator pump keeps working sending up a solid stream of bubbles. I had problems about a year ago and traced it to the electronic hi-limit board which I replaced and solved the no heat problem. Now it is back. I've pulled the new filters and tried resetting the power and the spa comes on and works for about a minute then begins flashing again. I would suspect the circulation pump but judging from the flow of bubbles, it is working properly. I changed it a couple of years ago. So, I have new filters, a fairly new high-limit board, good flow from the circulator. That leaves me with the heater itself and the possibility of buildup inside. I have ordered some spa flush which I hope will help clean out the plumbing but I'm not overly optimistic. Any help would be great. Davo Quote Link to comment Share on other sites More sharing options...
PreservedSwine Posted February 19, 2013 Report Share Posted February 19, 2013 Have you Ohm'd out the hi-limit thermistor? If you've got good bubbles, flushing anything out would be a waste of time. The flow is adequate. If the thermistor checks OK, try unplugging the Ozone generator- there is a very, very slight chance of EMI interfering with the control box. Quote Link to comment Share on other sites More sharing options...
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