The power distribution center, or fuse block, located under the hood houses most or all of the vehicleâs fuses and relays. It contains a relay for the ECM that is powered up when the ignition key is turned to the on position. This ECM power relay acts as a switch that supplies power to the ECM.
How to Tell When It's Time to Replace Your Water Heater. A water heaterâs lifespan depends on several factors, including water quality, water temperature, and maintenance. As such, lifespans vary anywhere from 8-15 years.
Prolonging Water Heater Life. Proper water heater maintenance can increase your water heaterâs efficiency and prolong its service life. Set your water heater temperature to 120 degrees Fahrenheit. If you plan to be away, turn the water heater off or the thermostat down to its lowest setting.