This might help. Re: Intex Pure Spa E95 Code, I need help!!
I have same error code E95. Filters work with heater turned off. Heater will not turn on. Intex says code means water is too hot. My water temp is 70 F, so that's not correct? Has anyone been able to fix this issue?
This is a theoretical discussion only concerning Intex Error Code 95. "Water Too Hot" issue when it is not! My tub was still under warranty when it failed after 10 months of lite use. Intex sent me a new base but this is how I might have effected repairs on the old base.
One could bypass the normal digitally controlled heating process in favor of an analog process.
1. You would need to add a relay that is normally open to the recirculation pump leads. The type of relay depends on the voltage supplied to the recirculation pump motor. My motor appears to run on 12 volt AC so a 12 volt relay would be in order. Coil lines run to the pump power leads while the N/O circuit is wired to another, second, 120V AC 10 Amp dpst or dpdt relay. This relay ensures that the heating element only receives power when the recirculation pump is energized and that the heating element lines are isolated when not in use. Otherwise, the heating element could turn on and either boil the water or worse.
2. The second relay actually takes the power load for energizing the two heating elements lines which would be rewired from the control board to the 120 volt relay. They can be wired together in parallel, not series.
3. A Thermostat, 104°F Temperature Thermal Switch Normally Closed KSD301 40C A324, is then attached to the recirculation pump short hose, pre-wrapped with aluminum tape first, then wrapping the thermostat with electrical tape after it is installed to keep it in place and to aid in reflecting the heat back to the switch. This is wired, inline, with the 120v heating element relay coil circuit in order to shut the heaters down once the return water reaches 104 degrees. This permanently sets the temperature to 104 degrees.
It appears that from my research, that while the recirculation pump causes some of the failures, $60 from Intex usually due to the ceramic pump shaft snapping, that other failures are due to the thermo heat sensor(s) or control board. Both of these failures are very hard to troubleshoot and detect with my limited skills. Also, it appears that, other than the pump, gaining access to the control panel and thermo sensors is not particularly easy.
Parts could be purchased from eBay and Amazon.
Bill