Chronic lower back pain (CLBP) is a significant health care issue in the United States and the world. CLBP contributes to decreased quality of life, decreased function and increased utilization of health care resources. The causes of CLBP tend to be multi‐factorial. Arthropathy of the lumbar facet joints is thought to be a common etiology (15‐45%). Radiofrequency Ablation (RFA) of the medial branch nerve of the facet joint is a well‐established treatment modality used to decrease facet joint pains. However, a wide range of temperature is being used (70‐90 degrees Celsius). In addition, the optimal temperature that provides the best patient outcomes with the least side effects is not well established in the pain management literature.