Pool Clown

How far off are the sensors?

After you adjust the temp to the number you want in the calibration menu, are you hitting "select"?

Is there a GFI integrated into the filter pump unit?

I would test the water for salt at a couple of different places. You may even want to invest (less than 100 dollars online) in a salt tester. Most will come with a test packet that you can calibrate with a known level of salt to keep your unit accurate. My guess is that you have too much salt in the pool if you added any. Keep in mind that: Salt does not evaporate. The only way you lose salt is when water is taken from the pool. Splashing, pumping out, etc. NOT evaporation though. If you system is running fine then all of a sudden it needs salt, something is up. If you truly need salt, you would only need 10# or 20# AT THE MOST, unless of course you just pumped alot of water out of the pool.

Unfortunately, the sensor is bad, and needs to be replaced. Hopefully, you are still under warranty

Have you verified the correct time (am/pm) with both the "time of day" and the programmed on-off time of the pump(s)?

You need to take the filter apart to see if you have damaged the grids (if it is a DE filter) or (the element if it is a cartridge).

Which lights?

Is this a variable speed pump? It is not uncommon for a basket to not completely fill up on a variable speed pump.

Everything in your post is accurate. Having said that, just relocate the cell to where it should be yourself, or pay to have it done. Sometimes its not worth the stress of trying to pursue problems with an old install... Unless of course you're up for it.

See if you can return the sensor and get a TS5L sensor instead. That is the one you need, and is still in production. If your guy doesn't want to accept the return of the first sensor, I would say that if you gave the parts guy all the numbers you gave in your post when purchasing the first sensor, he should have known the sensor he sold you wouldn't work.

Valves From left to right: Valves 1-3 controls return or water returning to pool from filter /heater (note: valve 3 is main return to pool). Valve 4 controls where water is sent, back to pool (left side) or back to spa (right side). Valve 5 controls where water is drawn from. From pool (to the right) or from spa (left). Valves 6,7 and 8. controls water drawn from pool. (guessing) skimmer, main drain, vac line? Pipes on the left: small one, not sure. Looks like an unused conduit. Larger one is the cleaner output back to the pool, or rather to the cleaner head. Not being there in person to confirm this, the above is a "best guess"

My experience It appears, through my experience, that Jandy is having difficulty keeping the internals of the sensor dry. They cant seem to find an epoxy that can tolerate the hot cold cycles that the sensor goes through to determine the three variables necessary to give the unit accurate information, those being temperature, salinity, and flow.

T101R

I can't tell what kind of quality or longevity you can expect from that cell. The OEM cell that comes with that unit can be expected to produce chlorine for about 5 years or 10,000 hrs.