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Yes it has a pressure switch. If the flow isn’t enough should I still bypass it and turn the heater on. How do I know if the heater is on or not? Also how do you jumper the pressure switch? I’ll check YouTube or google. Thanks

I recently purchased a Superior Spa hot tub used. Before buying everything worked as it should. Temp was around 98 when I went to look at it. Once hot tub was relocated, and filled, the heat would not get above 77 degrees when the temp was set at 95. I have turned the temp up to 105 and it won’t go above 81 degrees. I did some research and found it could be a possible flow restriction from the filter or a clogged pipe. I’ve also read to use a multimeter to check voltage at the heater terminals. I do do not have a manual for this tub and after looking on google it seems the company is out of the UK and for some reason no info will load on their website. Questions: Does anyone have any info on where I can obtain specific information on my model of hot tub? Get a manual? Had anyone had a similar issue as I, to help troubleshoot my problem? Thanks for reading.