why is my heat not working in my car

December 30, 2020 in Uncategorized

The coolant is housed in a translucent plastic jug in the engine compartment. My 2013 Ford Edge is blowing heat on the passenger side and cold air on the drivers side. Once the engine is up to temperature the thermostat opens and the coolant flows around the whole system. Dan Ferrell (author) on November 25, 2019: It's not safe to drive without a temperature gauge, but you may want to try an aftermarket solution in the meantime, so you can keep an eye on the temperature. Get the Latest Tech News Delivered Every Day, How to Fix It When Your Car Heater Isn't Working, How to Fix It If Your Car Heater Isn't Blowing Any Air, Universal Replacement Car Heaters That Work. Orders for printed manuals placed on or after December 24 will be shipped when we reopen on January 4th, 2021. However, low coolant often indicates another problem, such as a leaking gasket or hose. The coolant is forced around the passages by a water pump. When a car heater doesn't work, the most common cause is low coolant. If the temperature gauge isn't moving much from the lowest reading, or the car runs poorly for more than a few minutes on a cold day, the cooling system may not be working properly. There are many reasons your car's heater isn't working. Step 1 - A heater cannot operate unless the engine is full of coolant/antifreeze. If the blower doesn't receive power, check the blower fuse to make sure it's not blown. If you determine that hot antifreeze flows through the heater core, there may be debris in the heater box. The first thing to be affected will be the heater core — since it is higher than the engine, there might not be enough coolant to reach it. When your vehicle’s engine has cooled down, open the radiator cap and check the level of coolant. Also, my termperature gage on the instrument panel keeps going from normal back down to "C" (cold) while I'm driving. If it receives power, check if the blower motor is burned out, If the blower doesn't receive power, check the blower fuse to make sure it's not blown. Vehicle has dual heat/ac. Best answer for Why Does My Air And Heat In My Car Only Work Sometimes. The thermostat, and clutch or electrically controlled cooling fan work in conjunction to keep the water at the optimum temperature. They work by using the heat in the coolant system that circulates around the car's engine to cool it. Is the heater blowing cold air into the car, or is the car heater not blowing any air at all? Now start the engine without replacing the cap and idle for a few minutes. • A bad thermostat that isn’t allowing the engine to properly warm up. Why Doesn't the 12v Socket in My Car Work? Coolant that is a dark brown color indicates that there is rust in the cooling system. It's almost as unpleasant to have a heater that's not giving out enough heat. When you regulate the thermostat from hot to cold and don't hear the blend door moving, there may be a problem with the blend door, linkage, wiring, or the thermostat switch, depending on the vehicle. According to the Popular Mechanics website, a common cause of a car's heater not working is a buildup in the heater core. If it receives power, check if the blower motor is burned out. If your heat is not working, the first thing to do is figure out why. A small amount of hot coolant is diverted into a hose fitted into the firewall and then into a small heat exchanger or heater core. Squeeze the top radiator hose to help air pump around the system (taking care to avoid any moving parts, in particular the radiator fan, which could come on suddenly without warning). Turn off the vehicle and let the engine cool completely. • A blower fan that isn’t working properly. Lift the hood and check the temperature around where the heater core hoses enter the heater core box. A car heater that isn't working could be caused by several simple issues. It should have level indicators that show how full or empty it is. A faulty or broken thermostat is the most common cause of your car’s failing heat. Lack of maintenance. A vehicle thermostat regulates the coolant temperature in the engine. A network of passages carry liquid antifreeze/coolant around the hotter parts of the engine. If cold air is coming out of the heating vents, even when the vehicle is warmed up and the thermostat is set to hot, you could be dealing with one of the following problems: If the heater is broken because it's not blowing any air, it's likely due to a faulty blower motor or electrical connection. To do this, set the heater controls in the car to maximum heat, remove the radiator cap (or remote mounted coolant pressure cap, sometimes on the overflow tank) and fill to the correct level. Trying to work out why your car heater isn't working and why the car heater is blowing cold air when it should be hot? Filling the coolant may fix the problem in the short term. So, a problem with the vehicle's cooling system might also cause the heater to underperform or stop working. The only way to determine which component has failed is to grab some basic diagnostic tools, access the blower motor, and check whether or not it receives power. Another likely cause of a car that runs OK, but has no heat is a stuck thermostat. Check for debris in the heater box. If coolant level is low check the system for leaks. It's just iddle? Switch the thermostat from hot to cold and listen. Beginner’s guide: what is a four stroke engine and how does It work? A thermostat prevents the coolant from flowing until the motor gets warm enough. There could even be a puddle of liquid under the front of the vehicle. Either the blower isn't working, in which case you may get warm air but not much of it, or it is blowing air but it may not be very hot. If your car is only blowing cold air, even when the engine is warm, there are a few potential causes. After removing the blower, you may find that the squirrel cage is clogged with so much debris that the motor can't operate. How Does a Car Heater Work? Dysfunctional Thermostat. Here are a few of the more common reasons that’s causing the car heater to not work properly: The amount of coolant in the system is too low. This is why, once your car warms up, the temperature gauge should remain relatively static. I replaced my car ECU and noticed the temperature guage stopped working. Car Heater Blowing Cold Due to Cooling System Issue Grime or other sediment accumulate in the core and restrict the flow of heated coolant that serves as the source for the … If cold air is coming out of the heating vents, even when the vehicle is warmed up and the thermostat is set to hot, you could be dealing with one of the following problems: There are some common reasons can occur this. There are many reasons why a car heater is not working. A different reason for the heat to not work would be a lack of coolant going through the engine. Even if you live in Florida, Texas or California, these days you need your car's defroster to work properly to fight those early morning chills, and if you live up north a working heater can be a matter of life or death. If one hose is the same temperature as the coolant and the other hose is cold, there may be a blockage in the heater core. When cold the thermostat restricts the flow of coolant to prevents it from entering the radiator. A blown fuse often indicates a different underlying problem, so never replace one with a larger fuse to prevent it from blowing out again. Until the engine warms up, there’s no heat for the heater core to extract. You can easily understand this issue. Not sure if the new radiator had anything to do with it or not. Watch for the coolant level to drop as the thermostat opens. Why do i only have heat on one side of my car - Answered by a verified Auto Mechanic We use cookies to give you the best possible experience on our website. There are a few potential culprits for why your car engine coolant may not be heating up: Fixes: The only way to fix a faulty thermostat or temperature sender is to replace it. Instead, you might have a failed thermostat, which opens and closes circuits in the cooling system as the engine heats up. Is There a Cheaper Alternative to Air Conditioning? Between the engine heat and the water pump, all the air should be forced from the system. It doesn't move up or down. Fix this issue by your reliable mechanic. A car heater that isn't working could be caused by several simple issues. When it does happen, you're left with a miserably underpowered heat or AC system. I ended up adding an entire gallon of coolant over 2 days. If the vehicle has a valve in one of the hoses, check its operation. The specific diagnostic procedure varies depending on the vehicle. To find out what's wrong with your car's heating system and what you can do to fix it, you first need a basic read of the situation. The heater in your car is able to blow hot air into the cabin because of a part called a heater core. Reasons Your Car Won't Heat | Heater Stopped Working Heat in automobiles is supplied by hot coolant circulating through the engine. 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