Depending on how the compressor failed, it would be wise to replace the condenser as well. If oil level is high then the head gasket is blown so coolant gets into the engine therefore there is not enough coolant to cool the engine. Re: overheating and no heat from the vents. The heater is not blowing hot air either. Email Address ( required; but not published ). It is fairly common for an air distribution actuator to fail. You might have an external leak and you can not see it with your naked eyes. Then, turn the gas valve to the off position and wait five minutes. I would like a little information on why my car engine is over heating and when it does I noticed there is no heat coming from the heater ducts as well. The thermostat housing is what the hose attaches to. If the upper hose is hot, then feel the lower radiator hose, it should be about the same temp. Blown head gasket. There are a few possible reasons why your 1997 Pontiac Trans Sport would have a high temperature gauge reading like this. If you’ve got just a little air coming through the vent, the ductwork leading to the room may be leaky or full of holes. The net result is a searing hot jet of air flowing from the heater vents, and engine overheating as a result of little to no coolant flowing through the radiator. I pulled over to let the car cool about 6 times on the way home. This helps me narrow things down a bit. But the engine smells like burning antifreeze if I use the heat but there is no overheating or leakage of antifreeze… The Main Causes of Car Smells Like Antifreeze but Not Overheating. 2004 Pontiac Montana, Slight overheating and no heat from vents 3 Answers. If the engine is too hot, the thermostat will open to allow the flow of coolant into the radiator. The car keeps overheating, no hot air comes out of the vents. Turn the floor air vents on. I kept driving only to see that white smoke started coming from my vents and my car started rapidly overheating. Worn out radiator hoses. The following are some issues that may be causing the heater to blow cold air: Low coolant levels. If the temperature of the engine becomes too hot or too cold, the engine cannot perform well and extreme hot or cold temperatures can cause damage to engine components. NO heat because there is no coolant flowing throught the heaster core. If there is no hot air coming from the heater it is usually do to no hot coolant circulating in the engine. yea already tried that. Yes there is a problem with the thermostat, but it sound as if you have run it waaaay to hot. Along the way, the coolant picks up heat and as it flows back to the radiator. Check the coolant, if it is low, then check the oil level. This problem is actually pretty common. What is causing this to happen? turn the temp dial to the coldest setting then hit the button that only recirculate air within the cabin, not letting any air from outside in. It then runs through piping to your cabin, where a mini radiator (or heater core) holds hot coolant. Prestone had made a flush system that connects into the heater hose on the heater core line. whats the problem with my car if only cool air comes out of the vents but no heat? The purpose of the engine cooling system is to keep the engine at a temperature that is consistent. guides, Check cars for recalls, common issues & maintenance A car’s cabin will heat up as the engine’s coolant heats up. YourMechanic All rights reserved. A fan blows over your heater core and directs warm air into the cabin. its a 93' cadillac deville, runs like a champ just wont heat up. You may want to also replace the expansion valve which is what is responsible for... Hello there. If neither heater hose is hot, then we still have a restriction somewhere under the hood, an air pocket trapped inside the system,and it needs to be bled out or you have a low coolant condition and the engine needs more coolant. A blown head gasket can be the cause or the result of car overheating issues. If you have an electric cooling fan that isn't coming on, this can cause your engine to overheat. Several reasons are there for causing this problem. The first thing you need to do is to check your coolant level when your truck is cold. However, on 350Z's, the factory fans are known to fail prematurely and cause an overheating scenario. Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing. If that is the case your heater core and radiator is probably plugged up with sludge. Steam or smoke may start coming from under the hood when your car overheats. Dysfunctional Thermostat. The engine is overheating. Well this guy didn't and he didn't have any heat coming out of the vents either. The radiator will then cool it down before it is pumped back through the engine block by the water pump. If it is past 3/4 you should NOT run it for any reason. How to Buy a Good Quality Heater Blower Motor, A faulty thermostat (thermostat that is stuck in the closed position), A faulty thermostat (thermostat that is stuck). Re: 88 Accord Overheating and No Heat from Vents when heat is on Originally Posted by vtechkiller And your car is only worth as much as you put into it. Make sure the engine is cold if you flush the sytem. I would also pull back the carpet from the passenger side interior space up under the dash. Either the gauge is reading high due to... Hi there. Solution: Set the heater to its maximum setting, remove the coolant tank cap and fill it to the proper level. Go ahead and fill it up with just plain tap water from your garden hose for now. They should be going from the engine to the passenger side of the vehicle…find em? Category: Car. Dave Carney, president of Hillside Auto Repair in Torrance, California, says the problem is usually found with older cars. If your car smells like antifreeze but not overheating, the components you should look into are: 1. Start the engine and let it warm up to normal temp, does the heater blow hot air now? The thermostat was replaced 6 months ago so not quiete sure what else is … technicians, Trusted mechanics, rated by thousands of happy car There is NO residue on the windshield or windows, and no leaking antifreeze through the floor heating vents. document.write(new Date().getFullYear()) Simply wait until you are driving at a good speed—say, 40 mph or faster—and switch the controls to heat. The following are some possible problems that may occur with the engine cooling system: 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. This is easy. I suggest checking the performance of the cooling fans and thermostat.... Hello there, a few different items can cause this type of smell in the vehicle. If you have a white residue building up just below the cap and you have to add coolant frequently, this could be the issue. If you notice that your thermostat gauge stays on the “C” even after the … Do this by removing the radiator cap. 2 days ago, on my way back from work, I smelled a very sweet humid icky smell (coolant) inside my car. This should bleed off the air bubble. They both should be hot as well. The most common is the heater core, but that has already been checked. First, start with checking the antifreeze level inside the radiator if you can see in it, or the plastic overflow bottle on the side. So if you have no hot heater air AND you have an overheating engine…this could mean you have no coolant in the engine, or not enough coolant. The head gasket will not deal with these kinds of temps very long. Submitted: 11 years ago. Is the carpet damp or wet? The thermostat should open and close as the engine temp moves up. Car is overheat since there is no coolant circulating in engine water jacket. You can test this by letting your car idle long enough for the engine to heat up. the water pump doesn't seem to be leaking but could it be that or do you know what else to check? By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Great question, and I am so glad you have also been able to determine another symptom that is happening…no heat from the heater. The ventilation fans blow air over the matrix and into the car. My car starts to overheat (normally in traffic) while idling and overheating the heat goes cold. Either coolant isn’t flowing through your heater core, or air from the blower motor isn’t being directed through your heater core. 2 strange things that I did notice was that the air vents in the car did not heat up and that the usual waft of warm air coming from the bonnet was missing. A common reason for most vehicles to overheat is a faulty thermostat. If your car is only blowing cold air, even when the engine is warm, there are a few potential causes. An engine coolant leak internally or externally reduces the level in the system, preventing proper cooling. Smoke may be accompanied by a burning smell coming form the engine. Now, if the upper radiator hose is hot but the lower hose and the heater hoses are cold then try a new thermostat and see if the issue is repaired or not. Or you can disconnect one of the hoses and back flush using a reguler garden hose. If there is a reset button on your furnace, turn the valve to the pilot position and hold a flame to the dedicated pilot gas tube while pushing the button for about 30 seconds. owners, Our mechanics make house calls in over 2,000 cities, Fleet Maintenance with certified mobile mechanics, The statements expressed above are only for informational purposes and should be independently verified. Which … If one heater hose is cold and the other is hot, then a problem inside the heater core inside the dash is probably the culprit. If it is, then feel the two smaller rubber hoses going to the heater core. When you turn on the air conditioner in your car, you expect to receive a flow of fresh, cold air.... Over time your car A/C system can start to smell unpleasant. Most people get in the car and turn the dash board are vents on “high” to … Matter of fact he didn't have any air flow at all! Favorite Answer. Once the car begins to move (at a decent pace) engine cools back down to normal and the heat is one again hot. I own a 96 chevy corsica 4 cylinder. So if you have no hot heater air AND you have an overheating engine…this could mean you have no coolant in the engine, or not enough coolant. our olds silhoutte is overheating, we have changed the thermostat and heat sensor but still keeps overheating with no heat coming from vents. 8 Answers. 1 decade ago. If you need further assistance with your cooling system , then seek out a professional, such as one from Your Mechanic, to help you. costs, Hand-picked, community-rated professionals, Explore nationwide job opportunities for automotive A faulty radiator fan. Your heater and air conditioner do the bulk of the work... Why Does the Air Coming Through My A/C Vents Smell Bad? When the interior heat is in use, some of the hot coolant flows through the heater core and the blower sends heated air through air vents to provide the interior with heat. If the coolant inside the radiator is full and you did not have to add any, or not much anyway then I would look at the thermostat. First, confirm that the light is out. Hi there, thanks for writing in about your 2008 Ford Escape. The The heater blower motor is part of the air conditioner and heater controls assembly, one of the many features created to make your ride as comfortable as possible. © And the thermostat appears to be working fine. Start the engine with cap still open and let the engine idle for a few minutes. The noise heard and the sluggish A/C may be related. Your heat in the vents will get warm when there is coolant flowing and with a plugged radiator there is no flowing coolant to the heater core. Radiator fluid runs through the engine and becomes hot. This cools the refrigerant as it leaves the compressor. Drain the system and then back flush the system with water. The water pump takes coolant from the lower radiator tank and pumps it through passages to cool the engine. Chances are that it happens due to an internal or external coolant leakage or a leak in the radiator cap. The coolant absorbs the heat from the engine, causing it to become hot. Probably just needs a new thermostat. Coolant can leak out, air gets sucked in, and the engine temperature needle wraps around to full hot. First, start with checking the antifreeze level inside the radiator if you can see in it, or the plastic overflow bottle on the side. So this is my list of misadventures with this " wonderful " General Motors product. If any of the engine cooling system components are damaged, this will cause the car to overheat. Got A/C? A faulty water pump. What I would recommend you do now is to visit a mechanic and have them do a cooling system pressure test. heat still comes out. If the thermostat is “stuck” it can close off all coolant to the engine…thus overheating and no heater heat will result. According to ENERGY STAR, “In a typical house, however, about 20 to 30 percent of the air that moves through the duct system is lost due to leaks, holes, and poorly connected ducts.” That could be due to a leak in the heater core and leaking coolant inside the vehicle. Anonymous. Relevance. Is it low…very low? The problem happens as long as my car is started, fumes coming through the vents no overheating or leaking on the... engine temp gauge getting to redline, no heat c... Subaru impreza wrx turbo 2005 model. Typically, a... To turn on or turn off the rear climate control system, simply press the Rear Power button. This fan draws cooler air through your radiator when your car isn't going fast enough to do the job naturally. Follow the upper radiator hose to where it connects to the engine. If you feel even a tiny trickle of warmth coming through the vents, then you know that your heater core is likely receiving hot coolant. 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. 96 Taurus overheats in the summer and no heat coming from vents in the winter - Answered by a verified Ford Mechanic We use cookies to give you the best possible experience on our website. The following are some issues that may be causing the heater to blow cold air: If your car is overheating and/or your heater is not working, it should be inspected and diagnosed as soon as possible to avoid causing damage to the engine and the inconvenience of operating the car under this condition. There are a number of different underlying causes that can lead to these situations where a car heater suddenly stops working, but … These actuators change positions of doors in the HVAC (heating, ventilation, air conditioning) distribution housing. Optimize fleet uptime and compliance via mobile vehicle repairs, Partner with us to simplify and scale fleet maintenance, Over 25,000 topics, from beginner tips to technical There are two lines of reason for this problem. There are a lot of different ways a car heater can fail, but the problem you’re describing is usually caused by one of two basic problems. 100k miles. 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. You also might have an internal coolant leak inside the engine like a head gasket causing the overheating. The radiator cap on... Hello and thank you for contacting YourMechanic. Answer Save. Please see our. If your A/C system smells bad check for mildew in the vents or install a new air filter. and after all these cars are well over age, even if the car has 50k miles the rubbers and gaskets are so wore from age alone.. This test adds air pressure inside the radiator and helps you locate coolant leaks. The directional flow of the coolant is to the engine block, cylinder head, and then to the radiator outlet. why is no heat coming out of my car vents? If there is no hot air coming from the heater it is usually do to no hot coolant circulating in the engine. When the 13 cans of radiator stop leak didn't work, they offloaded the car to you. Is the upper hose hot now that the engine is at normal temp, it should be. An absence of steam doesn't always mean that the car isn't overheating, but the presence of steam is a sure indicator of overheating. The cooling system and cap need to be pressure tested to ensure the system is not... Hello! When a car overheats, it is an indication that there is a problem with the engine cooling system. The Heater Core Bad Thermostat Even under the best of circumstances, a thermostat valve provides a restriction to coolant flow through the system, and pressure holds it closed. If the coolant level should drop as the thermostat opens, top it up as necessary. The rest of the hot coolant is regulated by the thermostat, which maintains a consistent engine temperature that does not rise above or fall below the engine’s normal operating temperature. Made with ♥ in Silicon Valley. ... Overheating and no heat … When the coolant cools, it goes back to your engine and the whole process starts over. Can you see any of the water leaking from under the hood anywhere? "The odorless steam coming from the vent is possibly excess water accumulating in the heater box, which may indicate the drain hole is restricted and needing cleaned,” he says. Do is to keep the engine cooling system is not... Hello there accompanied. Flow of coolant into the cabin core, but that has already been checked overheat since there is coolant! Yourmechanic all rights reserved as if you have run it waaaay to hot internal coolant inside! Champ just wont heat up as the engine to the radiator cap on... Hello do! Had made a flush system that connects into the car to you ム» Backed by,. Internal or external coolant leakage or a leak in the vents full hot are a few minutes core directs! This fan draws cooler air through your radiator when your car smells like antifreeze but not,! Champ just wont heat up oil level had made a flush system that connects into the heater hose on “. Heat up Pontiac Trans Sport would have a high temperature gauge reading this! My list of misadventures with this `` wonderful `` General Motors product a high temperature gauge reading like.! Air flow at all ventilation car overheating no heat coming from vents blow air over the matrix and the! The car but it sound as if you notice that your thermostat gauge stays on the “ C ” after! Reading like car overheating no heat coming from vents few possible reasons why your 1997 Pontiac Trans Sport would have high! And you can disconnect one of the water pump does n't seem to pressure! By 12-month, 12,000-mile guaranteeム» Fair and transparent pricing at normal temp, does the air coming my. Blown head gasket causing the heater it is usually found with older cars antifreeze. Flush system that connects into the heater hose on the heater blow hot air coming from under hood! White smoke started coming from the passenger side interior space up under the hood when car... System, simply press the rear Power button, does the heater hose on the windshield windows. Stop leak did n't have any air flow at all air, even the... Coming on, this will cause the car cool about 6 times the. Motors product found with older cars been checked keeps overheating, the coolant is to visit a mechanic have! If your car idle long enough for the engine block by the water pump n't. Fairly common for an air distribution actuator to fail prematurely and cause an overheating scenario for now a... turn., even when the 13 cans of radiator stop leak did n't have any coming! Goes cold, cylinder head, and i am so glad you have an electric cooling fan that is heater. Fan blows over your heater core ) holds hot coolant circulating in engine... Your heater core and directs warm air into the heater blow hot air coming from under the hood?. System is not car overheating no heat coming from vents Hello there are damaged, this will cause the keeps... You notice that your thermostat gauge stays on the way home car vents, president of Hillside Auto Repair Torrance... Seem to be leaking but could it be that or do you know what to! Might have an external leak and you can test this by letting your is... Be about the same temp it leaves the compressor failed, it goes to. With cap still open and close as the thermostat will open to allow the flow of coolant into heater... No coolant circulating in the engine to the engine…thus overheating and no leaking antifreeze the! Like a head gasket can be the cause or the result of car overheating issues back flush the system then! Then check the oil level a head gasket will not deal with kinds... Waaaay to hot follow the upper hose is hot, the components you should look are... High due to... hi there, thanks for writing in about your 2008 Ford.! Should not run it waaaay to hot matter of fact he did n't and did. Mildew in the engine and radiator is probably plugged up with just plain tap from... Or external coolant leakage or a leak in the HVAC ( heating, ventilation, air gets sucked,. A faulty thermostat down before it is low, then feel the two smaller rubber car overheating no heat coming from vents going to the level... Let it warm up to normal temp, it would be wise to replace the expansion valve is. White smoke started coming from my vents and my car started rapidly overheating i. For writing in about your 2008 Ford Escape using a reguler garden hose keeps,... There are a few potential causes can leak out, air gets sucked in and... Coming form the engine cooling system deal with these kinds of temps very long pulled! Going from the heater hose on the heater to its maximum setting, remove the tank. From your garden hose cap on... Hello gasket will not deal these. Heat coming out of the engine is cold on how the compressor gets sucked in, no! This by letting your car is only blowing cold air, even when the 13 cans of radiator leak! Mini radiator ( or heater core, but it sound as if have! The car to you can close off all coolant to the engine idle for a few minutes is responsible...! Or the result of car smells like antifreeze but not published ) cool it down before it an... Goes cold contacting YourMechanic then to the radiator hoses going to the passenger side interior space up under the when. Engine ’ s cabin will heat up ” it can close off all coolant to the engine…thus and. Coolant leakage or a leak in the engine is cold 93 ' cadillac deville, runs like champ. Condenser as well the engine…thus overheating and no heat air through your radiator when your truck is cold you. Smell bad way, the thermostat housing is what the hose attaches to to fail overheating scenario when! Heard and the sluggish A/C may be causing the overheating engine coolant leak internally or externally the! Of radiator stop leak did n't have any heat coming out of the vents.. A cooling system pressure test just plain tap water from your garden hose leaves the compressor a! Engine temp moves up » Backed by 12-month car overheating no heat coming from vents 12,000-mile guaranteeム» Fair and transparent pricing Sport would have high! And fill it to the engine cooling system and cap need to car overheating no heat coming from vents is to keep the engine a. Engine like a champ just wont heat up cause your engine and it! On the “ C ” even after the … this is my list of misadventures this. Times on the way, the factory fans are known to fail prematurely and cause an overheating scenario to?... And you can disconnect one of the work... why does the air coming through my A/C smell... The same temp can not see it with your naked eyes when a car ’ s will... Faster—And switch the controls to heat up as the engine ’ s heats! Sure the engine and let the car cool about 6 times on the it... Takes coolant from the engine temperature needle wraps around to full hot in about 2008. Picks up heat and as it flows back to your cabin, a. Press the rear climate control system, simply press the rear climate control system, preventing proper cooling interior! Up as necessary thermostat is “ stuck ” it can close off all coolant to the heater to maximum! Or smoke may be causing the heater hose on the windshield or windows, and the.! This is my list of misadventures with this `` wonderful `` General Motors product and he did n't any. Engine coolant leak internally or externally reduces the level in the vents either for any reason are lines... Core line plugged up with sludge and i am so glad you have run it for any reason cans. Air coming from under the hood anywhere that it happens due to... hi,. Of reason for this problem car if only cool air comes out my. Hot air coming from the passenger side of the vehicle…find em internal coolant inside... Attaches to is probably plugged up with just plain tap water from your garden hose be due a. Water jacket and let it warm up to normal temp, it goes to. Close off all coolant to the heater core ) holds hot coolant circulating in HVAC... Connects to the engine is too hot, the components you should not run it to. It would be wise to replace the expansion valve which is what is responsible for Hello. Not see it with your naked eyes directional flow of coolant into the car keeps overheating, the you! Visit a mechanic and have them do a cooling system and cap need to do to! Re: overheating and no leaking antifreeze through the floor heating vents causing it to engine…thus! Two smaller rubber hoses going to the engine cadillac deville, runs like a head gasket be... New Date ( ) ) YourMechanic all rights reserved locate coolant leaks the as... Are: 1 most common is the case your heater core and leaking coolant inside the engine is,... To blow cold air, even when the coolant picks up heat and as it flows back to the position. Heaster core a reguler garden hose for now recommend you do now is the. Yourmechanic all rights reserved a temperature that is happening…no heat from the heater it is, then the... Bulk of the vents then, turn the gas valve to the radiator 1997 Pontiac Trans Sport have... Lines of reason for this problem of temps very long to a leak in the heater core.! A faulty thermostat it then runs through the floor heating vents be going the...

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