If the defroster is unable to blow hot air, there may be a clog in the cooling system or a malfunction of one of the actuators for the vent doors. The cooling system and actuators will need to be properly inspected to find the source of the issue.Continue Reading
A defroster produces heat using a heater core, which uses coolant to heat the air for a vehicle. Hoses run coolant into the heater core, which warms the air and sends it through the vents. There are several components in the climate control system that can malfunction and cause it to clog. When this occurs, the thermostat, heater core and radiator should be promptly inspected.
The actuators are special flaps that control the flow of air in the climate control system. When these doors are stuck shut, the heated air will not be able to reach the cabin of the vehicle. The following instructions explain how to troubleshoot the actuators.
The placement of the actuators vary on the vehicle and are generally located behind the dashboard. The dashboard may need to be removed.
Some actuators use air vacuums to function, while other use a cable. Test the door to see whether or not it opens and closes.
An actuator cannot be rebuilt, and if a part is malfunctioning, then the unit must be replaced.
Reinstall each part previously removed and test the new actuator.
The most common causes of an automobile heater blowing cold air relate to the heater core. This unit is a small radiator the manufacturer installs inside the cabin of the vehicle behind the dash. A fan blows air through it, and heat from the engine moves into the vehicle to provide warmth. Heater core problems are often difficult to fix due to the core's location; owners should rule out other problems before tearing into the car.Full Answer >
Reasons for car immobilizer repairs include faulty sensors, BSI Units, actuators, engine ECU or immobilizer ECU. Additionally, immobilizers can malfunction because the manufacturer-provided key fob loses coding or its transducer chip. Damage to the car's wiring may also warrant immobilizer repairs.Full Answer >
Those planning to fix their car's air conditioning system should become more familiar with the individual parts of the system itself. These include the condenser, compressor and refrigerant. Individuals should also understand how the air conditioner works in their car.Full Answer >
Car tune-ups may entail different actions to ensure cars run smoothly and safely, such as repairing and replacing oil and air filters, adjusting timing belts, inspecting the engine and adjusting the clutch on vehicles with a manual transmission system. Tuneups vary in extensiveness depending on the make and year of the car, along with any indications of problems. Regardless of car, however, technicians perform tune-ups using different diagnostic equipment and tools, which help detect problems.Full Answer >