John Birmingham Posted December 22, 2020 Report Share Posted December 22, 2020 Hello, Thank you for admitting me to the Pool Spa Forum. I am am total newby and have replaced the leaking heater and sensors on a friends Hot Springs Vanguard hot tub. After refilling and turning the electric on the tub immediately goes to Protection Mode. The service companies seem to be totally backed up, so it seems like we are on our own to try and figure this out. Any guidance would be greatly appreciated. John Quote Link to comment Share on other sites More sharing options...
CanadianSpaTech Posted December 22, 2020 Report Share Posted December 22, 2020 Try removing the filters and reset the main breaker. Run without the filters until the issue is fixed. Did you recently drain and refill the spa? You might have an air lock in the circulation pump wet end. 1 Quote Link to comment Share on other sites More sharing options...
castletonia Posted December 22, 2020 Report Share Posted December 22, 2020 Since it was right after a drain/refill, I would first be thinking the circulation pump is airlocked. If that is not it, hi-limit sensor would be my next guess. 1 Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted December 23, 2020 Report Share Posted December 23, 2020 Yeah... what they said... You have to fill those through the filter well with the filters removed. If not you will have an airlock. Turn off power and remove one of the hoses on the heater for a second to release the air. You will get a little wet when you do. Quote Link to comment Share on other sites More sharing options...
r5ran Posted December 30, 2020 Report Share Posted December 30, 2020 If you have an air lock, (and it sounds like you do) I found the easiest way to purge the air is to take off the circulation pump filter and post. Then stick a hose down the hole, then wrap a small towel around the opening, hold the towel tightly to seal off around the hose, and turn on the water full. This will force any air locked in the system out. You will start to see large bubbles escaping the jets and floor drain. It may take several minutes to purge all the air, but this has worked for me every time. I just automatically do this every time I refill now just to make sure no air is trapped. Thanks, Randy Quote Link to comment Share on other sites More sharing options...
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