First, there may be a problem with your Heater controls. 15 years of experience. The heater’s radiator clogs over time making it harder for the coolant to pass through its bearings, leading to slightly warm air or completely cold air blown at idle. Next, you need to check the water pump, thermostat, heater’s radiator, … The fan is not called a heater fan, sorry to disappoint you, because it blows air into the car for the air conditioner as well. During the winter when you crank up your heat, the coolant is brought over from the engine to the heater core that then blows warm air into your car. The coolant absorbs the heat from the engine, causing it to become hot. Break open the heater box and clean it out completely. Possibli it is an Air lock. I need help with the heater in my 1989 Mazda b 2600. The specifics will vary quite a deal from one vehicle to another, but most systems have some kind of blend door that changes how air flows or doesn’t flow, through the heater core. I honestly don’t mean this to be insulting, but you’d be surprised at how many times people are shocked to learn that neither your air conditioning nor your heater will be cold or hot right after you turn them on. bleed the air from the highest point on the heater system, take off a hose and prime it with 50% antifreeze solution if nescessary. If it’s not full, fill Can also be used as a fan to cool you in the summer months. This should bleed off the air bubble. Required fields are marked *. December 15, 2014 It is that time of year when one of the most important things to you is probably heat!!! In car heaters there is not an electric element. Yet, that could change if you’re having issues with your heat or your car overheating. Car heater blowing cold air can make your winter months unbearable for driving. Let’s get that taken care of so your morning commute isn’t any more miserable than it needs to be. There are all sorts of causes, many of which are relatively cheap to fix. When you put all the way to hot-cold-hot again, the solenoid can get loose and start working again for a while. A new Lv 4. Here are the various reasons that your car heater could be blowing cold air: If you want the best prices for your vehicle repairs, you should consider fixing them yourself. A car heater is a blessing that makes it easier to drive a car in a freezing season. 1. Find the procedure in a shop manual (at auto parts stores for about $20). Parts and labor to replace a broken thermometer in a car add up to about $200. If it’s where it’s supposed to be, proceed to step 2. This passage might be clogged with particles that buildup during the period of usage. Again, this depends on the make and model of your car, as well as the mechanic who’s doing the repair. Let’s get that taken care of so your morning commute isn’t any more miserable than it needs to be. Causes of a Heater That Blows Cold Air in a Car. Advertisement. I have a 2002 daewoo lanos SE. My car is over heating and heater blowing cold air changed thermostat not leaking any fluids no fog or wet floor it only over heated once then i parked it could this still cause sirious damage melinda on December 04, 2015: It could be due to one or more of the following issues: Throughout this article, you’ll learn the causes and methods of repairing a car heat that’s blowing cold air when it shouldn’t be. Replacing a heating core is one of the most expensive repairs due to labor costs. Lifewire / Maddy Price Reasons Why a Car Heater Stops Working . Sometimes corrosion and plugged inner tubes may be the culprit, or debris has interrupted the heater core fins. Sometimes a blown head gasket causes this, by allowing air into the cooling system causing the air … All I have to do to get hot air again is give it a little gas, say 200 more rpms, and the heater immediately responds with warmer air, hot air if I maintain 1000 rpms. First step is diagnosing the root cause of the lack of heat.. Here’s some easy stuff for you to check. Ask Question Asked 8 years ago. I turned on the car and I saw white smoke. How Much Does It Cost to Fix Car Heater Problems? If the valve is stuck closed, that may also answer the question, is your Toyota car heater blowing cold air. They’re designed to keep you safe by filtering out bad contaminants in the air, which aren’t going to be removed without a replacement. It is the reason you would end up having a car heater blowing cold air. Defrost or demist your car windows quickly and efficiently. When there’s too much dust and debris caught in the filter, the warm air builds up inside and doesn’t penetrate through the vents. When you’re ready to turn on the heater in your car, the last thing it should do is make everything colder. When your car does not warm up with the heater on, the thermostat may be stuck or the coolant may be low. Why is My Car Heater Blowing Out Cold Air? Otherwise, it is better to seek help from a car workshop. First step is diagnosing the root cause of the lack of heat.. Here’s some easy stuff for you to check. I had my car serviced recently and the mechanic seems to think I need a complete new heater. If your car starts to overheat and you aren’t able to read the gauge, you won’t know that there’s a problem until the vehicle is smoking. For example, air bubbles in the radiator can slowly cause a buildup of pressure, forcing a hairline fracture along the face of it. I adjust the settings and it blows cold even when the car isn't just ideling. This slight differential might be enough to make you consider doing the repair yourself, especially since air filters are one of the easiest fixes on a vehicle. Air in the cooling system impedes the circulation of coolant in the system, and as a result, the heater blows hot air only when driving, and cold air at idle. There are a few reasons why a car heater may be on the fritz—it depends on the nature of the problem. My heater will only blow cold air. Your email address will not be published. Minimum Air Temperature at Floor Outlet 52.2° C (126° F) 56.1° C (133° F) 59.4° C (139° F) 62.2° C (144° F) If the floor outlet air temperature is too low, Both of the heater hoses should be hot to the touch. If the car’s heater is blowing cold air at idle, you should first check the coolant level, and its condition, completing the coolant level is the easiest way but not always the best way to fix this issue. If you've ever turned your car heater on and only had it blow cold air even after time goes by, you may be wondering why. Heater Core Issues: When the car heater’s coolant doesn’t work correctly, it can blow cold air. eval(ez_write_tag([[250,250],'carphrases_com-leader-1','ezslot_4',108,'0','0']));eval(ez_write_tag([[250,250],'carphrases_com-leader-1','ezslot_5',108,'0','1'])); Usually, cleaning the heater’s radiator has a positive effect on the efficiency of the heater, including at idle speed. To test if the thermostat is working, check to see if the car temperature dial will rise even after the car is all heated up after like 10 minutes. eval(ez_write_tag([[300,250],'carphrases_com-large-mobile-banner-1','ezslot_3',112,'0','0']));If the car’s heater is blowing cold air at idle, you should first check the coolant level, and its condition, completing the coolant level is the easiest way but not always the best way to fix this issue. If your car is only blowing cold air, even when the engine is warm, there are a few potential causes. WHY MY CAR HEATER DOES NOT BLOW HOT WARM AIR. However I am a bit unsure about that. There could be various reasons for car heater not working but it basically happens for two reasons: air from the blower is not blow toward the heater core or the coolant does not flow through the heater core. On the other hand, neglecting the repairs could cause you to spend more money. Car Heater, Portable Electronic Auto Heater Fan Fast Heating Defrost 12V 150W Car Defrost Defogger, 2 in 1 Heating/Cooling Function 3-Outlet, Plug Adjustable Thermostat in Cigarette Lighter(Red), Shenlin 12V 150W Car Heater, High Power in Car Heater Fast Heating Fan for Defrosting Automobile Windscreen & Keeping Warm (Red), Electronic Car Heater Portable Auto Heater Fan Fast Heating Defrost 12V 150W Car Heater, Plug Into Cigarette Lighter, 2 in 1 Heating/Cooling Function 3-Outlet 360 Degree Rotary(Black), Car Heater Defroster Portable 12V 150W, Auto Heating & Cooling Thermostat Dual Fan, Powered by Cigarette Lighter Plug for Car SUV Truck RV Trailer. The heating system uses the heat produced by the coolant circulating the car when the engine is running. Driving an ice-cold car on a frigid morning is no fun and a heater blowing cold air is not only annoying it's a safety hazard. Sometimes the problem isn’t a big one, but finding it is not easy. The heater core has a narrow internal passage. If you had topped up the water and the problem is persistent, it is time to check the thermostat just to be sure. Heater blowing cold air 8 Answers When i turn the heater on it only blows cold air. Learn the possible causes to get your car back to being nice and toasty. But if your car heater blows cold air and you’ve checked both heater core hoses to make sure they’re hot, you likely have a bum blend door actuator. There’s nothing like getting into a warm car during the brisk winter. However, some drivers experience issues like their car heater blowing cold air. December 12, 2013 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. 8 years ago. It is important to understand how the heater works in your car before you can begin to try to diagnose why it is not working. You step out of your warm house and the chilly morning air instantly hits you. Schedule Your Service Appointment. If your car is blowing cold air that means that, the hot coolant is not reaching the heater core. If there is such information, you can check it yourself. Car heater blowing cold air? Clogs, leaks, bubbles, and broken thermostats can all cause cold air to come from a heater. Coolant (which is a mix of water and antifreeze) is what circulates around the car’s engine. Some people are more mechanically inclined than others, so there’s no shame in hiring a professional. The heat from the hot coolant is what your heater normally blows throughout the inside of the car. If the holdup is by the heater core, then that’s one reason why hot air isn’t blowing. If the heater has a tap for supplying coolant to the radiator, then this is closed or jammed because of rust. Chances are that if you’re getting a blast of cold air you don’t want when you turn on the vehicle’s heater or defroster, it’s a sign of the same problem: Something has gone wrong in … Other Reasons a Car Heater Can Blow Cold Most of the reasons that a car heater will blow cold have to do with the heater core, but you can also have a mechanical, electrical or vacuum problem. 7 Best Lubricants for Car Door Hinges Currently on the Market, How to Remove Rusted Screws From a License Plate, How to Clean and Restore Black Rubber Trim Around Car Windows. In short, you shouldn’t stress too much, but you should also make sure that you have the repairs on your to-do list. The following are some issues that may be causing the heater to blow cold air: Low coolant levels Always deal with small repairs before they compound and combine with others. Next, you need to check the water pump, thermostat, heater’s radiator, heater’s tap, presence of air the cooling system. 0 0. Before you settle for a quote, try to call around and get quotes from numerous shops in the area. Automotive Mechanic. Besides, the heater core has some fins in the external that can also be clogged due to debris or other particles coming from outside. 1. My Vehicle’s Heater Is Blowing Cold Air in Winter Temperatures! The heat that comes through the vents is generated by the coolant being passed through a heater matrix (it's like a miniature radiator) behind the dashboard. If it’s where it’s supposed to be, proceed to step 2. If you’re able to repair them by yourself, then you shouldn’t have an issue getting your heater back to blowing out warm air. With a heater blowing cold air, the first question I’d ask someone is if cold air is blowing from their furnace right after they turn their heat on. If you’re driving in the middle of winter and your car heater isn’t doing what it should, you could be in a terrible situation. Easy to use, just plug it into your vehicle’s cigarette socket and turn it on. Approximately 3 This type of heater is present, in most cases, on older cars and the simplest solution is to open the tap. If the coolant level should drop as the thermostat opens, top it up as necessary. How to know and calculate your car real fuel consumption, Pros and cons of using bigger wheels on a car, What is a fuel rail pressure sensor? Coolant misplacement can be caused by the aforementioned air bubbles stuck in the radiator, but it can also happen due to a leak or rupture in the system. Whether your radiator is cracked, the cap doesn’t have a proper seal, or one of the hoses is loose, you can fix this problem for less than $400 in most scenarios. Fixing this can be as simple as a fluid flush. Save my name, email, and website in this browser for the next time I comment. First, there may be a problem with your Heater controls. 4. Checking its operation depends on the specific car make and model and the type of system. Also cars use flaps to regulate air mix from heater core (it is in … Solution: Set the heater to its maximum setting, remove the coolant tank cap and fill it to the proper level. You can usually diagnose and fix the problem yourself in about an hour. Deal with all repairs as soon as you can to prevent the problem from getting worse or costing you more money. Your car’s heater isn’t meant to blow out cold air. The odds of it not working 5. The best way to check the reason behind your car heater blowing cold air AFTER you have verified that there is enough coolant in the radiator, is to touch both the heater hoses that connect to the firewall. I have a 04 Audi a8 and a few weeks ago the heater stopped working. However, many of the issues listed above can expand to worse concerns if you don’t deal with them in a timely manner. If the heater is blowing cold air and the car is overheating, it is likely that the problem is related to the engine cooling system as well. But, it only blows cold air and doesn't even warm up the car.... Any suggestions what to check before taking it in? The ventilation fans blow air over the matrix and into the car. If your heater is blowing cold air, and it’s not one of the first two possible explanations on this list, then you’ll need a specialist to at least come and take a look. You rush to your car, turn over the engine, crank up the heat, and wait. If your car heater starts blowing cold air instead of hot, you will be very frustrated. My Vehicle’s Heater Is Blowing Cold Air in Winter Temperatures! Finally, a broken thermostat can be a huge concern if you can’t keep an eye on the engine’s temperature. Defrost or demist your car windows quickly and efficiently. There are five main causes why the heater is cold at idle.eval(ez_write_tag([[468,60],'carphrases_com-medrectangle-4','ezslot_0',104,'0','0'])); A low coolant level in the tank represents the main reason why you don’t have hot air in the cabin, it is not just related when the engine is idling, however, this can be the reason why your heater blows cold air at idle. Heater is not working Inspection: $79.99 - $89.99: Get a Quote: Evan Clay. A: Your heater is broke! So, do you know why your car heater is blowing cold air? Instead, you have what is called a “heater core.” The blower is what circulates the heat through the core and then warms the car and passengers. Heater cores are precisely a cooling system component resembling compact radiators. There are several reasons why your car's heater may be blowing cold air, instead of heat. You settle for a Quote: Evan Clay possible causes to get your car back to being and. 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