How To Unblock The Heater Core?

- Oct 15, 2020-

   Knowing that heater repair is very important, especially when you are always on the road. If your car cannot generate heat, then you need to check your heater core immediately. The heater core is a small car device that allows the antifreeze to flow to the thermostat. You will check the entire heater system.

  Step 1 Check the coolant level, the first thing. You need to check the coolant level and start the engine before the radiator and overflow tank. Low coolant level will cause the heater core to not work properly.

  Step 2 Check for leakage. Put the same proportion of antifreeze and water into the radiator and overflow tank. The first thing you need to pay attention to is if you smell something or see moisture on the floor on the passenger side. Another thing you need to pay attention to is that there is a layer of greasy mist inside the windshield. This may indicate that the heater core is leaking, and if you encounter any of these conditions, you will need to replace the heater core.


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  Step 3 Set the temperature, turn on the engine, set the temperature, and leave it in the park.

Remember to release the hood lock and keep the parking brake. When checking the temperature change, find the thermometer, which is located on the dashboard, to see if the temperature is between 190 and 220 degrees. If the thermometer does not change, you may have a problem with the coolant or thermostat level. Pay attention to changes when the engine is working. Step 4 Check the radiator. You need to check whether the radiator hose is warm. You must open the hood and find the radiator on it. Touch it carefully, or if you can wrap your hands with a cloth, to avoid any chance of getting burned.

  The next thing you need to do is to find two smaller hoses to connect to the firewall on the passenger side of the car. Please note that this will depend on your car model. So if you can't find these two hoses in the radiator above, you have to crawl under the car to find them. These two hoses are connected to the inlet and outlet of the heater core. If one of them is cold or hot, the heater will clog. Step 5 Cool the engine, turn off the engine and let it cool down first.

  Then take out your garden hose to clean the heating core, then take a clean bucket and place it under the hose connection. Use a screwdriver to remove the two hose clamps, then pick up the hose again, connect it to the inlet, and wash it again. After cleaning, replace the connecting hose and tighten the screws. Add antifreeze to the radiator before starting the engine.