A block heater is a device that is installed in the engine block of a vehicle to heat the engine coolant. This can make it easier to start the engine in cold weather, as the warm coolant will help to reduce the viscosity of the oil and make it easier for the engine to turn over. Checking the block heater is a simple process that can help to ensure that it is working properly and that your vehicle will start easily in cold weather.
There are a few different ways to check a block heater. One way is to use a multimeter to test the electrical continuity of the heater. Another way is to check the temperature of the engine coolant after the heater has been plugged in for a period of time. If the coolant is warm, then the heater is working properly. Finally, you can also check the block heater by starting the engine and listening for any unusual noises. If the heater is not working properly, you may hear a grinding or squealing noise.