Report Override 104' High Limit Hot Tub Is Luke Warm in Portable Hot Tubs & Spas Posted September 28, 2007 I am new here. We have a 2007 Sundance Spa and have the same problem. We have had it since June 8th and only once has it actually retained 104 degrees. Love the spa, but its just not hot enough. The installer said he could hot wire it. But they have since let him go and the owner says he wont do it. However my aunt has the same Spa and her tech added a chip of some sort and it maintains 106 in the winter. Which is why we spent thousands of dollars on this unit. Any help would be excellent! I think you could have one of two problems. If the SPA does not get up to 104 degrees measured by fancy 3rd party thermometer I would bitch like hell to the people you bought it from. The bigger problem is if the SPA is in fact getting up to 104 degrees but in your opinion that is not as hot as you want it. That is my problem. It is always at 104 degrees no problem but that is not hot enough. This has to do with the government trying to protect us from ourselves. Mfg. will lose their UL certification if SPA goes over 104.