There are several reasons why your car is heating cold air instead of heat. It is important to understand how the heater in the car works before you can begin to try to diagnose why it does not work. First, there is no electric heating element in the heating system in cars that are used as portable heaters in the apartment. The part is the heat in the interior as a heater core. A heater corecan be like a miniature radiator. The car engine coolant flowing through the heater core, while (the fans) and a fan blows air through the heater core fins. When the air blows through the heater core fins, it is warm, thus warming the interior.
Start by removing the coolant. As I said this is what heats the coolant heater core. So, if the coolant is low, it can not a sufficient amount ofHeat transfer heat to the air in the passenger compartment. Because it's cold outside, can not the low coolant temperature of the engine much effect, so that you no warning to a coolant problem caused by the temperature gage on the instrument panel. Once the coolant is full, feel the heater hoses that go through the firewall. With the engine at normal operating temperature, which should both be hot on the heater hoses. If only one is hot, thisindicates that a blockage in the heater core or the air trapped in the heater core. With a Lisle coolant funnel is in cleaning the air from the cooling system helpful. If the coolant is actually brown, has been neglected, or "leak" was used at a particular time is, could be stopped, the heating core. The blockage can sometimes by the heater hoses and using a garden hose with a syringe to flush the heater will be unstoppedCore. If neither of the hoses are hot to the touch, it could also a failure of heating control valve, if you are working on the model used. Check the presence of a heater control valve by the heater hoses back on the engine. Sometimes a vacuum line could have a break where they cause no vacuum to operate the valve. Also it should be noted that if this (your first winter with this car and you are not familiar with repair of the carHistory), the previous owner could have avoided because the heater core of a leak. If a heater core leak, usually they get wet the passenger side floor. The labor costs for changing radiator usually expensive, so sometimes people loop the heater hoses and by-pass rather than repair a leaking heater core right.
Next check for proper ventilation. Once you are sure the heater core is hot waterflow, read the following information. Doors inside the heater case, are controlled either by electrical motors, cables or vacuum motors. Adjust the heat control to both extremes while listening for the movement of the mixture door. With a cable operated heater door, it is easiest to hear knocking on the door when it is closed. If the door is not in operation to find the door that the airflow through the heater core controls. If there is an electric motor that controls the door,Tap, it can sometimes make it work temporarily for testing purposes. A vacuum operated vacuum motor must work so that a handheld vacuum pump for the test is generally recommended. If the motor does not hold vacuum vacuum, a leak in the membrane replacement needs. Be needed in order to lower the diagnostic function of head control and diagnosis, repair manual specific information. But, hopefully, has explained the basics in this article helped to get you started onthe right track.