Made several attempts to program temp at 104 degrees, continuously returned to 255degrees. I believe the board is failing? I have the actual part number from my heater board as 42001-0096, the manual says we should have 42002-0007S the model number of the heater is SR400NA, does anyone know which is correct?
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A) Inlet water temperature sensor is reporting a temperature in excess of 104 degrees.
Normal operation resumes 2 minutes after inlet water temperature sensor reports temperatures of 104 degrees or less. This error functions in both normal and remote thermostat modes.
B) Inlet water temperature sensor is reporting a temperature change at a rate faster than 6 degrees in 60 seconds, indicating a potentially damaging low water flow conditon. Normal operation resumes when temperatures stabilize. If this condition is detected 3 times, the heater will lock-out until the electrical power is cycled off and back on.
I believe what your experiencing is the 75 degrees is the hold temp position...the display then reverts back to the actual room temperature...it doesn't mean the set temperature changed back to 65 degrees. Try to reprogram the thermostat schedules, and try not to use the hold function...just the temporary hold. (which is bumping the programmed temperature up or down until the next programmed period)
You probably don't want health advice ... but ... well ... Im going to give you some anyway cause ... it is my dime. 104 degrees is not only very expensive to maintain ... it is also dangerous at exposure levels in excess of 15 minutes for ADULTS -- IF YOU ARE IN GOOD HEALTH. Less time if you are in less than perfect health. For children, deadly! I am not interested in what your neighbor may have told you - believe me when I tell you children in a hot tub near that temp is big trouble. Please don't do this.
Ok, your machine MAY have a internal safety that will not allow you to heat the water more than 98 degrees. It may require a professional to change that internal setting. It may also be that your heater is not capable of heating that amount of water to that temperature.
Did you or someone calculate the heat requirement and loss for your body of water? Do you know how many gallons of water you are heating and what is the BTU rating of your boiler? Gas, Oil or Electric?
If you can get me this additional information, Id be glad to do a calculation for you.
I have a 2002 Infinity 6 man spa that I just got from a friend. I am also an Electrician. I had to replace the Spa pack because it wasn't working. Once I replaced the Spa Pack and used the tub it got up to temp no problem but once I got in the temperature slowly dropped and it couldn't keep up. After some research and discussion with a pool tech I found out that there is a jumper on some spa packs. It is a LC (low current) / HC (high current) jumper. It limits the current (amperage) that your tub draws. If you are running it on the LC setting it keeps the tub at low current by not running the heater when the jets are on. (this way it keeps the current low by running one only at a time) If you set it for HC it will allow high current to be drawn and let the heater and the jets be on at the same time. On my spa pack it is P26 Jumper. I have found it is also listed as Jumper 4 on some spa packs. the jumpers are located in the lower right of the circuit board. Make sure you shut off the power to the tub and know what you're doing before you attempt changes. you can also google "Gecko Spa Pack Service Manual" and you will find the manual for your tubs spa pack. Good luck.