I have a temp control program that keeps my system temps very tight, but does involve a lot of heater switching on and off, particularly at night in the winter. The frequent heater switching killed one of my EB832 outlets after about 2 years. I'm not entirely surprised, although I had hoped that the relays would be more robust. They should last for around 100,000 cycles, which even with frequent use would still be 10 years or more. But high current devices must cause them to deteriorate much more quickly. I have also spoken with knowledgeable LFS staff who have seen a fair number of these come in with relay failures. I anticipate more failures of my EB outlets in the years to come, unfortunately.