Heater Troubles? Here’s Why Your Car’s Heater May Not Be Working

While your car’s heater is a simple component, there are several possible reasons why it isn’t working. It can be a little trickier than you think to get it fixed. Here are some potential causes of problems with your car’s heater, along with some advice on how to go about getting it fixed so you can be warm again while you drive!

Bad Heater Core

If your car’s heater isn’t working, it may be because of a bad heater core. The heater core produces warm air from the vents, so if it’s not working, you will not get any heat. There are a few signs that your heater core may be going bad, including leaking coolant or strange smells from the vents. If you think your heater core may be going bad, it’s best to take it to a mechanic to have it checked out.

Low Coolant Level

One reason your car’s heater may not be working is because of a low coolant level. When the coolant level is low, there isn’t enough liquid to absorb heat, so the engine can’t get warm enough to produce warm air. You’ll need to add more coolant to your car to fix this. Low coolant is usually the result of a coolant leak, so let your mechanic know if your vehicle is low on coolant.

Failing Thermostat

A failing thermostat is one of the most common reasons your car’s heater may not work. If the thermostat is not opening, the engine will not be able to warm up and circulate warm air. In some cases, the thermostat may be stuck in the closed position, preventing coolant from circulating. If you suspect your thermostat is failing, have it checked by a mechanic.

Blower Fan Not Working

The blower fan is responsible for circulating air throughout the vehicle. If it’s not working, then the heater won’t work either. There are a few reasons the blower fan may not work, such as a blown fuse, loose wire, or bad motor. 

Contaminated Coolant

One of the most common reasons your car’s heater may not work is that the coolant is contaminated. Over time, the coolant can become filled with dirt, rust, and other debris, clogging up the system and preventing it from working correctly. 

A malfunctioning heater is the last thing you want to face during the cold winter. See your mechanic if your heater is keeping you warm anymore.

Photo by timnewman from Getty Images via Canva Pro

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