Heating System Rewire Kit upgradeProduct Description: This factory upgrade heating rewire kit controls your pressurestat and prevents the unit from over heating. Overheating can occur due to the pressurestat and safety relay working together. The safety relay gains control over the pressurestat and other factors maybe the main causes of overheating. With the help of the Rewiring Kit you will remove some some of the pressure and trigger the safety relay to turn on and off. This will