why is my car not blowing hot air

A cold winter day is no time to find out your car heater isnвt working. There are any number of reasons cold air or no air is coming through the vents. This blog post will give you a good idea of what might be causing the problem with your car heater. Iвll also talk about how you can maintain your heating and cooling system to minimize future problems. Before going into greater detail on why the heater may not be working and how you can maintain the system, letвs talk about the heater in your car. Did you know itвs part of the cooling system? Itвs really quite ingenious. Each time a spark ignites the fuel in the engine, thereвs a tiny explosion that generates a lot of heat. The radiator, thermostat, belts, water pump and hoses are responsible for circulating water to the engine to keep it from overheating. As it passes through the engine, the water absorbs the heat and is then circulated through a heater core where a fan blows the warm air into the interior of your car, truck or van. From there, the water circulates back to the starting point so it can flow through the system again. Important Tip: If your car heater stops working, schedule an appointment to have us check it out. A heater thatвs not working could mean there is a problem somewhere else in the cooling system. If thatвs the case and you donвt get it fixed, you could wind up with a major repair expense, or worseв an engine that needs to be replaced. Whatвs causing my car heater to not work? The amount of coolant in the system is too low. When your vehicleвs engine has cooled down, open the radiator cap and check the level of coolant. If you find itвs too low, you will want to add the appropriate mixture of coolant and water to the radiator.


You will also want to schedule an appointment to find out where the coolant is leaking. It could be a faulty radiator cap or it could mean thereвs a leak somewhere in the system. Either way, you donвt want to drive around with a vehicle that is leaking coolant. This vital fluid is what keeps your car from overheating. The flow of water through the heater core is hindered by a pocket of air. As we saw earlier, warm water is circulated through the heater core. There are hoses on each end of the heater core, both of which should feel warm when the engine has been running and is at operating temperature. If air is blocking or lessening the flow of coolant through the heater core, the outlet hose wonвt feel warm. The thermostat is sticking. The thermostat is designed to open and allow coolant to flow throughout the system when the engine reaches a certain temperature. A faulty thermostat will affect the proper flow of water and can cause issues with the heating system. The heater control value isnвt working. This valve opens to allow the water to flow into the heater core. If the heater control valve is the culprit, the air coming into your vehicle wonвt feel warm. The heater core may also leak coolant. The heater core is clogged from debris in the cooling system. If debris has caused a clog in the heater core, it will need to be replaced. A faulty blower motor. Youвll know this is the problem if no air comes out of the vents when you turn on the heater. A kink in the heater hose is preventing the proper flow of water through the heater core. The water pump stopped working and needs to be replaced. What things can I do to maintain the heater in my vehicle? Itвs simple. By properly maintaining your carвs cooling system, you are maintaining the heating system too.


Periodically check the level and condition of the coolant. You should also have the coolant flushed and replaced on a regular schedule. Donвt forget to inspect the belts and hoses and have them replaced when they show signs of excessive wear. The easiest way to maintain the entire cooling and heating system is to bring your vehicle to our auto repair shop in Byram, New Jersey. With each service, we conduct a courtesy inspection of all the major engine systems. If our certified auto technicians find a problem, we will let you know about it so you can have it fixed before it becomes a major problem.
With the frigid temperatures we have had in the past couple of weeks, many people are noticing that the heater in their car is not working at 100 percent. Or they expect their car to be instantly warm and cozy like the home they just left. Our vehicle heater is designed to warm the passenger compartment. The heater uses heat that is generated during normal engine operation that causes the coolant or antifreeze to get hot. The radiator is designed to expel excess heat. However, the hot coolant also gives us the opportunity to use some of this heat to be directed to the heater core. The engine cooling system uses a water pump to circulate liquid coolant (a proper mix of antifreeze and water), from the engine thru hoses to the radiator and heater core. Once the heat from the coolant has been utilized, it is circulated thru the engine again to absorb more heat. The heater core is like a mini radiator that is installed generally in the dash or near the firewall of the vehicle. The heated coolant circulates thru the tubes of the heater core, and the heater fan blows air across those tubes and through the little fins encasing the tubes and directs warm air through the heating vents of the cabin of your vehicle.


The controls of the heater system vary in most cars. There are primarily two designs, a Manual Control System and an Automatic Temperature Control System. The Manual Control System requires manual adjustment from the operator or passengers in the car, to keep the cabin at the desired temperature. The Automatic Temperature Control System, is a computerized management system, that is designed to keep the cabin at a selected temperature or even split the settings for the driver and passenger compartments. The heater control system of a vehicle runs the blower motor, blend doors, and temperature operation. 1) Low coolant level on a vehicle due to a coolant leak. 2) Thermostat that is stuck open. 3) Plugged or leaking heater core. 4) Heater blower that is not functioning. 5) Blend doors that are not functioning properly. If the heater in your vehicle is not working properly, we recommend having it checked out by your trusted repair facility. If it is related to the engine cooling system, other issues can occur if you run your vehicle low or without the proper mix of coolant. Especially in extremely cold or hot outside temperatures. If you have any questions or comments feel free to call us at 503-465-2926 or email us at cars@allaboutautomotive. com. Steve and Karen Johnston are owners of All About Automotive, providing auto repair and auto maintenance in Historic Downtown Gresham. If you have questions or comments, call them at 503-465-2926 or email them at cars@allaboutautomotive. com, you can also visit our website at www. allaboutautomotive. com.

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