Back in May, my Hayward TCELL-15 stopped working. (At least 4 years since I last replaced it) I found that the replacement cells had jumped up to over $899 in price. (For reference, in 2013, I paid $429 for a new one)
I was on a cheap fit and decided to try a cheaper off-brand cell. (First mistake) I went with an interesting cell that was partially see through. The website said it has a 5 year warranty and it was only $369! Wow! (second mistake!)
Product arrived with no issues. Installed and we were running fine for 3 months. Last weekend, my Aquarite panel started showing a "Hot" error which is one I have never seen before. Turns out this seems to indicate the cell's on-board thermistor has gone bad. I used my multimeter and confirmed the resistance was only 2k ohms instead of the 8-10k ohms it should be. Naively thinking I am well within my 5 years, I contact the website via email. No replies. They have a live chat feature on the site, so I talk to the first person... and as soon as I mention I need a warranty replacement, the chat session is terminated on their end. (Not a good sign). I try again and get a different person (in name at least) and this time I simply ask about the warranty and what the process is. They point me to a dedicated web page on their site for warranty claims. It is a simple form. Put in my info, give them the order number, date of order, picture of the error, and copy of the latest pool report showing low chlorine level. I put all of that information in place and submitted. Seems to have gone through.
I am currently waiting for their feedback. I am not holding my breath. But in the meantime, I have purchased the OEM Hayward cell like I should have in the first place. PM me if you have any questions...
I also saw a Youtube video where you can cut into the cell's cable and simply cut the thermistor wires and connect a resistor that is set to 10K ohms to trick the panel into thinking the cell's thermistor is working... I know that is probably a bad idea since the panel does need to know the actual water temperature. I also saw another person who physically put a thermistor into a hole they cut in one of the PVC pipes and wired that to the control panel.
Here is my Aquarite panel diagnostics:
Temp: 154
Cell voltage: 32.7
Cell current: 0.00
Output% 8SP
Salinity 0
Product name: AL-3
Software rev: r1.59