Raypak 206A will not ignite SNS code

[z06801]

have a 7 year old Raypak heater throwing a SNS code, how to diagnose?

 

[ajw22]

Raypak Heater Fault Code Guide

Raypak heater fault code guide.

www.inyopools.com

SNS

Temperature sensor is out of acceptable range.

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.