Review on TEC1 12706 Heatsink Semiconductor Refrigeration Thermoelectric Industrial Electrical by Bradley Wacks

blocks are out of order. After replacing the OEM with one of these, it won't get as cold as the OEM. So I tried two others from the batch with the same result. I finally bought another peltier element from an ebay seller and it was immediately as cold as the original peltier element. Something is wrong with the batch I bought here.