Vehicle Heater not working - Blowing cold air!
There are several reasons why your car heater can blow cold air instead of heat. It is important to understand how the heater works in your car before you start trying to diagnose why it does not work. Firstly, there is not an electrical heating element in the heating system in automobiles, such as in space heaters used at home. The part that transfers heat into the passenger compartment is referred to as a heater core. A heater core can be considered as a miniature heater. The cooling liquid of the motor car flows through the heater core while the fan (also called a blower), blows air through the heating radiator fins. When blowing air through the fins of the heater core, it is heated, thereby warming the passenger compartment. Start by checking the coolant. As said coolant is what warms the heart of heaters. Therefore, if the coolant is low, it may not be a sufficient amount of heat to transfer heat to the air in the passenger compartment. As cold outside low cooling can not perform the operating temperature of the engine significantly, so you will not be alerted to a problem by cooling the temperature gauge on the dashboard. Once the coolant is full, feel the heating pipes that pass through the firewall. With the normal temperature engine operation, both heating pipes should be hot to the touch. If one is hot, this indicates that there is a blockage in the heater core or there is air trapped in the heating radiator. By means of a funnel Lisle coolant is useful to bleed air from the cooling system. If the coolant is really brown, has been neglected, or "leak off" was used at one time, the heater core could be stopped up. The blockage can sometimes be unblocked by removing the pipes heating and using a hose with a sprayer to rinse out the heater core. If none of the pipes are warm to the touch, it could also be a defective heating control valve, if it is used on the template you are working on. Check for a heating control valve following the return of heating pipes to the engine. Sometimes a vacuum line may pause causing that there is no vacuum to operate the valve. in addition, it should be noted that if this is your first winter with this car (and you are not familiar with the history of car repair), the previous owner may have bypassed the heater core due to a leak. When a leaking heater core, in general, they wet the floor of the passenger side. Labor costs to change the heater cores is usually expensive, so sometimes people loop heating pipes and bypass heating leak kernel instead of repairing it properly. then Check for adequate ventilation. Once you are sure that the heater core becomes the hot water flow, read the following information. Doors within the heater housing are either controlled by electric actuators, cables or empty engines. Set the heat control at both extremes while listening to the movement of the mixing door. With a cable operated heating door, it is easier to hear the thud of the door when it closes. If the door does not work, find the door that controls the flow of air through the heater core. If there is an electric motor driving the door, by tapping it can sometimes function temporarily for test purposes. A vacuum operated motor must empty for work, so using a handheld vacuum pump for testing is generally recommended. If the vacuum engine is not empty, the diaphragm leaks requiring replacement. To go further in diagnosing the function of the control head and diagnosis, the specific repair manual vehicle information is required. But hopefully the bases set out in this article has helped to start you on the right track.
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