I have been working on Jandy systems for about 10 years. I have changed over a 100 code 170 and only a few ended up being anything more than the trisensor. The new sensor only has 2 contacts instead of 3. Im talking about the part that goes in the cell. The silver ones. Make sure you get one of the new ones or you may end up having the same problem again soon. I know some Jandy reps that know a lot more than me but I have been doing Jandy Warranty repairs for over 10 years in the New Orleans area. Not telling you this to brag. Just wanted to let you know my experience. Code 170- Code 172- and no flow showing on remote are all sensor problems. When you look at the contacts you may see some rust. If you do this almost always gives Code 170.