Discussion Starter • #1 • Jan 2, 2009. Access them anywhere. Category: Chrysler. Heater valve is jammed/faulty . If you notice that it initially vents out cold air, but over the drive goes to warmer air, then the problem is likely a frozen expansion pipe. The heater in my car is intermittent. When driving, an engine typically takes about 5-10 minutes to reach its proper temperature. The taillights go out when the brakes are applied. 3. 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. The core, a type of heat exchanger, gets its heat from liquid engine coolant that circulates through it by means of heater hoses. If I drop below this, from stopping in traffic, or too high of a gear, then the air will turn cold. Replacing a thermostat is a relatively easy DIY project on some cars but can be difficult on others. While driving the air is cold and at times it starts blowing warm air. Average repair cost is $580 at 11,050 miles. 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. This genuinely becomes a safety hazard because heat is needed to remove ice and fog build-up on your windshield—not to mention that extreme cold for extended periods is extremely dangerous. After 10-15 minutes, the heat often peters out and I am getting cold to lukewarm air. If the car does get up to temperature as it should, there’s probably something else that has gone bad. Your furnace blowing cold air could be caused by hot air escaping through holes in the duct work that carries the heat throughout your building. You’ll want to flush it several times with water to get all the sediment and build-up out of the heater core or blockage area. Faulty Heater Fan. | Yahoo Answers. If you let it sit and idle for a while, it will start blowing hot, but it will also sound and smell as if antifreeze is boiling over. The cooling system thermostat also may be failing to open, preventing coolant from circulating. It might blow comfortable cold air for 30 minutes and then go back to blowing warmer air. Compromised flame sensor. If the holdup is by the heater core, then that’s one reason why hot air isn’t blowing. Intermittently blew cold/normal. (A clogged heater core can prevent hot air from blowing without causing other problems.) Car Questions. Ask Your Own Chrysler Question. How we test gear. The ac went out on us about 6 months ago so we had the compressor replaced. What is intermittent cold air? This is a two-for-one space saver as this jump starter from Anker also serves as a battery back for smartphones. My Ford F-150 heater is... My Ford F-150 heater is working intermittently. Fan blowing but no warm air coming out the vents. What's going on so We can fix it. What happens is that the heater always blows hot for the first 10-15 minutes of driving (of course progressively hotter as the engine warms). melinda on December 04, 2015: My truck is a 2011 chevy colordo and the heat or a/c will work. Jan 18, 2015 at 12:15 PM #1 #1. Sometimes it blows out hot air and sometimes it is cold air. Coolant doesn’t just disappear though, so there’s a leak in the system somewhere that you want to find sooner rather than later. If the thermostat breaks closed, then you’ll have overheating problems, but they’re not designed to break that way. A fan blows over your heater core and directs warm air into the cabin. December 7, 2020. We took car to dealer and we hope they solved the stalling, but for some reason they didn't get around to looking at AC. We have had bigger issues to deal with lately with intermittent stalling on the interstate. Now that it's winter and -17 degrees this morn, my 07 Charger R/T 5.7L AWD is having cabin air heat problem. If your car is only blowing cold air, even when the engine is warm, there are a few potential causes. Turn off the vehicle and let the engine cool completely. Show Less. Average repair cost is $580 at 11,050 miles. The passenger side of the car is getting no/some heat. It takes much longer than normal to get heat in the cabin and will never blow warm air if I'm in traffic or spend a lot of time at idle or low RPMs. The coolant absorbs the heat from the engine, causing it to become hot. It's no fun getting into your car on a frosty winter's morning only to find the car heater not blowing hot air. I play with the thermostat, blend door functions etc. No, your car didn’t get confused and turned on heat by accident. This will make it incredibly difficult for the engine to heat up in cold temperatures since it’s constantly being cooled. Recently my heater has only been working intermittently. service. An A/C performance check is the easiest way to uncover what’s plaguing your car air conditioner. electrical If it’s really low, it might not be able to warm the heater core, even if it’s doing an adequate job of preventing engine overheating. It might blow comfortable cold air for 30 minutes and then go back to blowing warmer air. It’s not always easy to diagnose heater problems. Compact and sturdy, this shovel for SOG should be more than enough to help dig your car out of any snowy conditions. What to check first if your car heater is blowing cold On winter mornings, many drivers are disappointed to find their cars and 4x4s have heaters that are blowing out cold air. But if you feel the chill of cold air in your car, even after the engine has been running for some time (and the system is set to hot), then the following issues are likely: Heater core is clogged . A fan blows over your heater core and directs warm air into the cabin. A condenser’s job in a vehicle is to cool the warm refrigerant that was used to make the air cold in the evaporator. Games to Play in the Car (With or Without Kids) September 14, 2020. hvac Car Questions; Ford Repair; Ford F-150: My Ford F-150 heater is working intermittently. First, check the coolant level when the engine is cold. We took it back to the shop and they noted that the compressor was shutting off for some reason. 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. At low speeds, the heater blows cold and as we get to a higher speed, the heater gets hot like normal. These instructions will help you diagnose and fix a car heating system that only blows cold air. Thermostat is $600. Buildup of grime is fairly common in coolant systems, so there could be a restriction somewhere. Here's how: Turn the ignition switch to the ON position. Opel made a car in Europe some years ago called the Astra which was a divil for doing this and you had to undo the reservoir and hold it high with the engine running to get the air out of the heater core. While idling, the heater blows but doesn't produce hot air. (A clogged heater core can prevent hot air from blowing without causing other problems.) Heater has decided to blow cold air only 16 Answers Antifreeze is topped up, problem started with intermittent heat, now none at all. Also, while driving suddenly it stops heating and just blows out cold air. Coolant does evaporate sometimes but if the head gasket was gone and the coolant was going there, you would have been getting over heating before this. Thermostats are a common wear item, and typically break open, so it’s always allowing coolant to flow through the engine. My car has 118000 miles. About a week ago, on a chilly morning, I noticed that my heater fan was not blowing on any speed, regardless of what I tried. 11. If the engine is cold, the thermostat will restrict the flow of coolant into the engine, allowing it to warm up quickly. If neither of those is the cause, then the heater core and ancillary components are likely culprits. Have an expert inspect your ducts along with the furnace. Driving. However, if I fiddle around with the temperature control I can get the vents on the passenger’s side to blow warm air. This heater core then passes the hot air it generates into the vehicle with a blower fan. My car … No other warning lights are active on the display. If your furnace starts blowing warm but then quickly turns cold, the flame sensor may need attention. It’s possible that the heater core and other parts are fine, but the computer has grown tired of constantly catering to your climate needs and stopped answering your calls. Schedule an appointment online or stop by your nearest location today! Cars.com’s Editorial department is your source for automotive news and reviews. The cruise control doesn't work if the headlights are turned on. I have a Ford Taurus and the heater, of late, is working intermittently. While driving, the heat will cut out, and blow cold air. Many different things can go wrong here causing the whole system to work poorly or not at all. What I've been able to determine has some effect on this, lately, is engine speed. Another possibility is that a door or diverter that is supposed to direct warm air into the interior is stuck, preventing proper airflow. Dealer said coolant leading from radiator and to replace it including hoses is $1250. My friend thinks I am a car-god. A condenser has coils and a fan to push the air through the coils and thus cool the refrigerant. Related: Tips for Starting Your Car in Subzero Weather. When your car A/C blows cold then warm, head to your nearest Firestone Complete Auto Care. I did this procedure and it worked! If you're having trouble getting the ice off your car, this will help things along. On cars with automatic temperature control, a “set-and-forget” feature that is supposed to maintain a constant temperature, the computer that controls the system might be malfunctioning. Chrysler Town and Country blows cold air, Chrysler Town and Country heater blows warm air, or. Coolant is low . DOUGDARLAND MEMBER; 2005 KIA SORENTO; 2.4L; 6 CYL; 4WD; AUTOMATIC; 130,000 MILES ; I have a few things going on. The morning was cool and I was quite irked that it wasn't working and figured I must have blown a fuse. Submit Your Questio... Lexus RX350 heater ... Notifications Clear all Lexus RX350 heater intermittently blowing out cold air Last Post RSS. Your Check-Engine Light Is On — How Much Are Repairs Gonna Cost Ya? Generally, I get no more hot air for the rest of that drive. If your car's blowing cold air when the heat's on, your car's engine coolant could be running low. why does my heat not blow hot air until i start driving 1 Answer. Answered in 20 minutes by: 10/7/2011. If the fan has broken, then there certainly won’t be any warm air from the heater core coming your way. If i turn it off for about 10 minutes it will blow hot again for again about 10 minutes and then blows cold again out of the defrost vents. Sometimes it can cost up to four figures if you have a bum heater core, other times it’s as easy as a broken switch or dial on your dash. In many cases this type of problem can be caused by a faulty HVAC control head or intermittent blend door actuator or low coolant. Radiator fluid runs through the engine and becomes hot. Because the hot coolant results from waste heat in the engine block, cabin heat is “free” (by contrast, the car’s air conditioner requires engine power to create cool air, which decreases fuel efficiency). HEATER BLOW COLDIn this video we will explain the reasons why your car heater might blow cold air. The A/C only blows cold air once in a great while and only for a short time. 1. The cold air returns shortly, and the cycle repeats itself for as long as you are driving. Save cars. Popular Mechanics participates in various affiliate marketing programs, which means we may get paid commissions on editorially chosen products purchased through our links to retailer sites. I can set the temp at maximum, in either auto or manual modes and even though the car is obviously warmed up, I get lukewarm or cold air. 4. These time increments can vary in every case, of course, but basically it means that the cold air comes and goes. Any suggestions? Checking to make sure the engine warms up properly is number one on the list. Fly or Drive: Comparing Costs of Road Trip vs. Air Travel. If the heater still blows cold when there doesn’t appear to be a problem with the water level or the thermostat, it could be due to a blockage of air in the cooling system. Today heat went on then went cool pretty quickly and sporadically went back to heat. If one or more of these issues is present, your vehicle may blow out cool air rather than heat: Not enough coolant in the engine; Problems with the heater core; Clogged or broken heating controls; Dysfunctional thermostats Chrysler Mechanic: jeepmopar76, Chrysler Triple Master Tech replied 9 years ago. If hot coolant isn’t circulating through the heater core, perhaps a valve isn’t opening to allow that flow, or the core itself is leaking or clogged, or perhaps developed an air lock if air wasn’t properly bled following cooling system maintenance. This will cause plenty of other issues, but there won’t be enough coolant to sufficiently warmup that heater core as well. When you put all the way to hot-cold-hot again, the solenoid can get loose and start working again for a while. Is hot but the other day turned on do not warm up quickly core as well do it DIY on... And at times it starts blowing warm but then quickly turns cold, the air is cold air once a... 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