eheim/jager heater calbrating issue
I have anEheim 100 watt heater and it worked fine for many months. I unplugged it in the summer and left it in my 40 gallon tank because in Southern Califronia we don't need a heater in the summer EVER. A couple weeks ago I plugged it ini And now it won't calibrate. It stays around 80 degrees Fahrenheit. I just want to drop it down to &7/78 degrees. I can't believe this too much to ask.
I unplug the heater and follow the calibrations instructions to calibrate it. I have done this 4 times now. I have checked the tank with 3 different thermometers.
I have re-read the instructions over and over and watched 2 different YouTube videos to make sure I'm not doing it wrong.
I bought it in April of this year, Don't have a receipt because it worked fine for 3 months after I purchased it and most retailers wouldn't even consider a refund or exchange this far along anyways.
Any suggestions on how to get this thing working right?