7 Reasons Why Heat Doesn’t Work In Car
Driving with a faulty heater core can be extremely inconvenient. Not only do you struggle to clear the fog from your windshield, but you also have to contend with cold air, making winter driving difficult. Your vehicle requires a heater core to function properly. Not all car heaters, however, perform as expected. This article will examine why heat doesn’t work in car properly.
What is a Heater Core?
The heater core is responsible for circulating hot air from the engine to the cabin. It ensures that you have the same level of comfort in your car as you would in an air-conditioned home.
The heater core, like the radiator, is connected to the cooling system of the vehicle. A car heater, as opposed to a radiator, ejects heat from a car’s hot coolant and channels, heated air into the car cabin. The car heater works by transferring heat to the interior. It not only keeps the interior warm and cozy but also helps remove excess heat from the engine.
Signs of a Faulty Heating System
You must turn on your heater before winter arrives. During routine inspections, keep an eye out for the following signs:
1. Fog Inside Your Car
Windshield fogging typically occurs during the colder months as humid air from passengers condenses. The presence of fog inside your car, on the other hand, could indicate that your heater is leaking. A sweet-smelling vapor will be produced by a leaking heater core. If you suspect a leak, contact a mechanic for a new heater core.
2. Sweet Smell in the Car
If the heater core is damaged, the odor of engine coolant flow will make its way into the cabin through the vents. You might mistake this smell for your musty perfume, but don’t ignore it.
3. The Cooling System Is Not Working
Another sign of a faulty heater core is a cold interior combined with an overheating engine. This could be due to a core leak that is causing coolant to leak in your vehicle.
Reasons Why Your Car’s Heater Is Malfunctioning
Winter drivers are constantly concerned about the condition of their vehicle’s cooling system. A faulty heater could seriously harm your car’s engine. We explain why your car heater isn’t working properly below.
1. Low Coolant
Your car’s interior will remain cold when the coolant level drops, stopping the hot fluid from entering your cabin. Low coolant levels are associated with an overheating engine, making it a relatively common and well-known problem among drivers.
2. Faulty Heater Fan
Your car could be chilly because of a faulty blower motor resistor. If the motor is broken, air might get into the cooling system. This can cause the engine to overheat. Keep an eye out for a burning smell in the car and a whirring noise from the vents.

3. Faulty Thermostat
A broken thermostat is one of the most common reasons that warm air from the coolant does not reach your cabin. This problem can deprive you of warmth and affect your engine’s cooling system. To cruise with comfort and ease, check the health of your thermostat regularly.
4. Leaky Radiator
A lot could go wrong with a leaky radiator. It can damage your engine and prevent heat from getting into your cabin. A leaking radiator could be a sign of a damaged coolant valve. If you are near Lino Lakes, drive into Lenfer Automotive & Transmission shop for a diagnosis.
5. Faulty Wiring or Blown Fuses
Car enthusiasts know that car wiring can be spoiled, just like HVAC controls. When the car wiring is ruined, the heater will fail to initiate when you want it to.
6. Broken HVAC Controls
Your car’s heating system might not respond to your commands because of a problem with your car’s knobs, buttons, heater control valve, or touchscreen. Professional auto repair technicians can quickly fix or replace shorts and bad dials, and restore your heating system.
7. Clogged Heater Core
Debris in your coolant system can take the spectacular performance of your heater core to its knees. Rust in the radiator or debris in the heater core are common reasons for clogging. If your heater core is clogged, call a mechanic for an easy fix.
How to Maintain Your Car Heater in Perfect Condition
Don’t take your car’s cooling system for granted. The following tips will ensure your car heater stays in top shape to provide heat and keep the interior comfortable.
1. Get a Professional Cleaning Service
Professionals such as Lenfer Automotive & Transmission can service your car’s heating system. Their expertise and advanced equipment will ensure that your troublesome heater core is a thing of the past.
2. Address Heating And Cooling Issues Quickly
If you notice a problem with your heating or cooling system, contact a team of professionals right away. What you require is a long-term solution, not a quick fix.
3. Keep the Car’s Interior Clean
Particulates and dust can clog your heating system. As a result, vacuum your carpets, mats, and seats on a regular basis. Take your car to a salon on a regular basis for a thorough cleaning as well.
4. Let the A/C Run for About 10 Minutes Every Week
It is in your best interest to switch on the A/C for about 5 to 10 minutes weekly to maintain its proper working condition.
What Is the Lifespan of a Heater Core?
A copper heater core will serve you for about 5 years, while an OEM aluminum heater core can go for 7 years. However, most heater cores start malfunctioning after 10 years.
Experiencing Car Heater Problems? Lenfer Automotive & Transmission Will Sort You Out
It’s inconvenient to discover that your car heater isn’t working, especially as winter approaches. To avoid this, restore the health of your cabin’s interior by cleaning it and performing regular heating and antifreeze system maintenance. For all of your heating, cooling, radiator, transmission, and other car problems in Lino Lakes, call Lenfer Automotive & Transmission at 651-369-7771.

