The most common indications that an automotive heater core is failing include a foggy windshield, steam coming from vents when the heater is switched on, a water surging sound inside the dashboard, a sweet-smelling aroma coming from the vents and wet carpeting on the front passenger side. Heater cores are responsible for extracting heat from the coolant and transferring warm air into the passenger compartment.Know More
Heater cores look like tiny radiators and heat passenger compartments by allowing hot coolant through small tubes with fins. Powerful fans then force air through these fins when heat is needed to warm passenger compartments.
There are several reasons why heater cores malfunction, but the common causes include continued temperature cycling from cold to hot which leads to leaky fittings, vibrations, rust build up and corrosion.
At times, low coolant levels and bad heater blowers are the culprits of insufficient heating. If warm air suddenly becomes cold while idling, inadequate coolant levels fail to reach heater cores that are normally mounted higher than an automobile's cooling system. This most often overlooked scenario could lead to clogging and eventual heater core failure.
According to Street Directory, flushing a clogged heater core sometimes improves efficiency, but replacing it is a better option.Learn more about Car Parts & Maintenance
The main symptom of a failed heater core in a car is a lack of heat from the heater or defroster. More condensation than usual on the windshield and damp floor mats can signify a blocked core. Orange or green drips from under the instrument panel indicate leaks.Full Answer >
There are many symptoms of a bad starter, but one of the most notable symptoms is the vehicle failing to start when the key turns to the appropriate starting position. Because a faulty starter mimics other potential problems that may cause the car to not start, such as a bad battery, it is helpful to narrow down the possibilities by ensuring that the battery is not dead or that the car has enough fuel.Full Answer >
Symptoms of a bad ignition module are sudden engine stalling or power loss while the car is in motion, engine stuttering accompanied by a smell of gasoline and an inability to restart the engine following a stall. Decreased gas mileage is also a sign of a compromised ignition module.Full Answer >
Signs of a bad ignition switch could include dashboard lights that come off and on, problems with the vehicle starting and a switch that is hot to the touch. A bad ignition switch can mimic other problems that are seen in a car, such as a faulty motor starter.Full Answer >