Everything worked fine for a couple years and all of a sudden my elements are always at 100% power output even though the PIDs are telling the elements to turn off, i.e., the out1 light blinks when it's close to temp and turns off when the temp is reached. It's doing this with two PIDs and recently I replaced both SSRs because they both showed signed of heat damage (melting). I wired them the same way as the old ones. Is it possible the new SSRs are not working? How can I test them? One of the replacement SSRs has an indicator light on it and it bliks with the PID out1 light but still 100% power output.