Getting a sns code on control panel display. Where is the sensor located on this pool heater?

temp sensor failure

On Rheem gas fired pool heaters SNS is a temp sensor failure.
1. Water temperature is below 36F or above 110F
2. If the two thermistors are more than 2 degrees apart, the SNS code will appear.
3. Loose or corroded connection at P1.
4. If the sensor is not mounted all the way into the JACO fitting on the header, it may give a false reading.

SNS 1) SENSOR IS FAULTY
2) TEMPERATURE IS ABOVE 110°F
3) TEMPERATURE IS BELOW 36°F

It is one of the above situations

SNS on Raypak heaters means the following:

1. Water temp is below 36 degrees F, or above 110 degrees F.

2. The sensor contains 2 thermistors. If they are more than 2 degrees aparts, an SNS failure will occur. Replace sensor.

3. Loose or corroded connection at P1 on the main CPU board (right behind the LCD screen)

4. If the sensor is not mounted ALL THE WAY into the JACO fitting (on top of the header) it will give a false reading.

It is more likely than not, that you need to replace the temperature sensor. Part number 009577F.

SNS means the temp sensor is out of acceptable range. Could be the following:

1. Water temp is below 36 degrees F
2. The sensor contains 2 thermistors, if they are more than 2 degrees apart and SNS failure will occur
3.Loose or corroded connection at P1 on the main board
4. If the sensor has come out of the JACO fitting on the header, it may read a SNS failure.

Solution, visually inspect the connections for corrosion. If it looks ok, then replace the temp sensor.

sns occurs when sensor reads temps under 36 degrees or above 110 degrees. check temp of of water to verify.....may need a new water sensor

refers to flame sensor in combustion chamber