Car heater issues can be problematic and confusing, especially when your heater stops blowing hot air during winters. Many people complain that their heater stops working and they have no idea what to do next. By the end of this article, you’ll learn how to fix a car’s heater without hiring an expert.

There are a few reasons your heater isn’t working. Since there are many components in the system, there may be multiple reasons. Below you’ll find some incredibly easy ways to solve common heater problems. So, let’s get into details:

1.    There isn’t Enough Coolant for the car heater

The heating mechanism in the car works with coolant, which is a mixture of water and antifreeze. This mixture cools the vehicle during hot weather. But, it also helps in winter as it flows to the heater core that then circulates the warm air in the car.

Sometimes, when you turn on the heater, you might notice that the air is cold. But with time, it starts to turn hot. This happens because it takes time for coolant to heat the interior. So, the coolant level is not right when the air remains cool for long periods. Therefore, you need to balance the mixture to revive your car’s heater.

2.    Blockage of Heater Core

Another reason why the car’s heater isn’t properly working is the blocked heater core. When the salt and rust clogs the air path, the hot air can’t flow through the valves and pipes into the cabin. The heater core is a small radiator and works as a cooling system. The heater includes aluminum and brass tubes that circulate hot coolant. When the coolant reaches the core, a fan blows the hot air in the car. This helps with defrosting and heating the car.

You need to remove the heater core from the dashboard and check for blockage. You can blow air or water in the core to identify the rust or salt deposit. In this condition, replacing the core would be the best decision. Here are some signs to determine blockage of heater core:

  • The engine overheating
  • The car is consuming more coolant
  • The sweet or fruity smell in the car
  • Fog in the car

3.    The Control Buttons are Non-Functional

In an older car, the control buttons for the heater stopped working. If you can’t find any issue with the heater core or coolant, you need to replace the functional buttons. Until you replace the button, the heater won’t turn on. If this doesn’t work, try replacing the heater control valve, which is under the hood. The valve acts as a switch that turns the heat on and off. When this valve isn’t working right, you won’t be able to turn on the heater.

Now that you know the three common problems and solutions for car heater blockage, you can fix the issue at home. However, if none of the above methods work, you need to consult a professional.