The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. The heater control valve is typically not service able and is just replaced if faulty. 1999 Boxster 2.5L with 98k miles. 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. the thermostat starts to open up, the fluid path is changed and the What needs to be fixed to make the heater blow hot air again? Broken compressor clutch; How can you fix an AC that blows warm air? Defective compressor; 3. Other signs of a faulty heater core include a sweet-smelling scent in your car, windows that become particularly fogged-up, and puddles under the dashboard or on the passenger-side floorboard. Air May Be Warm, But Not Feel Like It. If your car is blowing cold air that means that, the hot coolant is not reaching the heater core. For a better experience, please enable JavaScript in your browser before proceeding. Nope, everything is red including the guy in the middle. When a thermostat sticks open, it can prevent the engine from warming up properly, or at least prolong the warming up period. Car Heater Stopped Working…Kind of. Rotated all the unmarked relays around in the junction box. entering the heater core. I bet its still in blue, have you checked that yet? 6. Heater not working 3 Answers. A forum community dedicated to BMW owners and enthusiasts. Why would your car only blow warm air and not 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. Connect OBD-II code reader and see if there are any codes present - to confirm the theory. Rotated all the PDC relays around, they have the same ID, other than ABS pump. Heater Control Valve - When you set the heater temperature dial to hot, air being passed over the hot heater core should be ducted into the cabin. The heater control value isn’t working. When fluid moves through the engine it heats up. The Heater is Too Big/Small – The heater’s size makes a difference to how well it works. But it doesn't. Sometimes if I turned the heat off or switched it from cold back to hot it would work again. Something is wrong when that does not happen. 2005 Montana heater blowing warm air only. Blown clutch fuse; 9. Here are just a few things that could mean: 1) Dead Batteries in Thermostat Faulty Heater Fan. 1. temperature of the fluid is held at the rated temperature. I have the same problem and this is the first winter for me in this car. Heater blows cold while in idle but hot while running. 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. Do not argue with an idiot else he lowers you to his level and beat you down with experience. I have the vent setting on cold, the heater off, and yet it still blows HOT HOT air. The coolant return heater hose should be slightly cooler than the coolant supply heater … Start the engine with cap still open and let the engine idle for a few minutes. 2008 BMW 528xi space gray, Premium, Cold Weather Package. I usually start by checking the coolant level. Now that it's in the 30's - 40's (coooooold here in Texas! I have a 2006 Chrysler town and country replaced the thermostat and the heater stopped working, blowing cold air only, went about 100 miles at first it was warm then it started blowing cold air. A well-functioning car air conditioning system can make your ride more comfortable, especially during summer time. Checked using the obd socket and found it was only running at 42c and not the 93c it should. Turn dial all the way to cold, passenger and driver vents blow cold air (expected) – turn dial all the way to hot, passenger side blowing out the same cold air but driver’s side blowing extremely hot air. Blower still does not work. 4. Blower still does not work. How many candles are on a Hanukkah menorah? Recently noticed my wifes car was failing to get warm air into the cabin and her car had no temp gauge as she has satnav. Bringing the BMW community together. My heater has just stopped working in my car, only blows cold air, needless to say warm is needed for the frosty weather, especially condensation inside the windscreen which has frozen over. ...I know the AC doesn't cool that much in summer.... Are you making sure to change the temp setting from blue to red? The ventilation fans blow air over the matrix and into the car. The coolant return heater hose should be slightly cooler than the coolant supply heater hose. 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. This started about a week ago. If the coolant level is fine then you may have an issue with the thermostat being stuck in the open position. If your car is not blowing warm air into the cabin and the coolant level is fine, then you could have an issue with your heater core. It has a pressurized coolant reserve tank and no bleeder valve. If the heater is broken because it's not blowing any air, it's likely due to a faulty blower motor or electrical connection. Has your car got a temperature gauge and is it showing hot. Checked continuity of 40 amp blower fuse; it's okay. Can switch temperature gauge and it will blow cooler air . Solution: Set the heater to its maximum setting, remove the coolant tank cap and fill it to the proper level. I thought it was the BMW thingy...I know the AC doesn't cool that much in summer. Thermostats have different temperature I would find it hard to believe that the heater core is … 2) Thermostat that is stuck open. 6. I think the thermostat is stuck in OPEN position and as a result, coolant is taking forever to get hot. If it isn't, it could be because the heater control valve is not sending hot coolant to into the system. The heater’s blowing cold, or the AC is blowing hot. A fan then blows across this heated piping and into your cabin. But all you have to work with are the symptoms. In addition to the above; turn dial about 10% (keeping it in the warm) the passenger’s vents start to heat … Purchased the car in the middle of summer last year, so I didn't even think to test out the heater. Hello. All Rights Reserved. 2011 X5 35i Sport Activity|Plat Gray/Beige/Dk Poplar|Conv Pkg|Cold WX Pkg|Tech Pkg|Prem Sound|Comfort Seats|Hitch|. There are many reasons an HVAC (heating, ventilation, air conditioning) system might stop working. If you notice no hot air coming out, the first step is to check your coolant levels. 1. 3. What needs to be fixed to make the heater blow hot air again? Also, your core may have a However, this temperature pales in comparison with the air emanating from a gas furnace, which is typically between 130 to 140°F. VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Faulty Heater Fan. The fan works but it's not blowing any hot air, only cold air. The heater control system of a vehicle runs the blower motor, blend doors, and temperature operation. When did organ music become associated with baseball? 3) Plugged or leaking heater core. The hot coolant flows in one side of the heater core and out the other side headed back toward the engine. Why would your car only blow warm air and not hot. Come join the discussion about Bimmerfest events, production numbers, programming, performance, modifications, classifieds, troubleshooting, maintenance, and more! Both input and output hoses hot. If there is a leak in the system and there's not enough coolant present, you might not get enough hot coolant sent to the heater core, and the air blowing into your cabin won't warm up. work,and the same problem will occur. Have a 2000 gmc sierra. You can set the temp on the dash knob but you also need to go into idrive under climate control and adjust the air temp from blue to red. Who is the longest reigning WWE Champion of all time? This happened a handful of times last year. The heater core is clogged from debris in the cooling system. Truck is a 2016 2500 with just over 50k on the 6.4. Low coolant will cause this. Press the "Auto" button and turn the iDrive dial until the bars, and the bloke in the middle turn blue. Current: 2012 550i xDrive | Dinan Stage II | DGMetallic II | Black Nappa | Anthracite | Convenience | Cold Weather | Driver Assistance | Luxury Seating | M Sport | Premium Sound | ARS | Paddles | Active Cruise | Ceramic | BMW Apps, from what i read its either the heater control valve. The heat from the hot coolant is what your heater normally blows throughout the inside of the car. It does take some time for the coolant to get hot enough to blow hot inside of the vehicle. While you may be getting hot coolant/antifreeze into the heater core, the heater fan, the part that actually blows the heat into the cabin, can break or suffer an electrical short. The heater core is a smaller radiator, but instead of exchanging the heat with the outside air, it sends the hot air to the blower motor and through the climate vents. Why don't libraries smell like bookstores? Most (not all) cars are heated by the engine. Checked for battery at the blower, when the car is running. I put the heat on and about after driving a couple of miles with the heat on it would randomly blow out cold air. This should bleed off the air bubble. A car heater blowing cold air could be a symptom of the failure of the heating unit.. A different reason for the heat to not work would be a lack of coolant going through the engine. On hot it is just blowing lukewarm air . Bad cooling fan; 6. I even have just the middle section blowing air to see if that helped. Electrical wires issues; 10. What does contingent mean in real estate? If the heater control valve is the culprit, the air coming into your vehicle won’t feel warm. I’ve squeezed the upper coolant line and release one air bubble, but it did not fully fix the issue. 10 causes why AC blows warm air. setting i.e. While you may be getting hot coolant/antifreeze into the heater core, the heater fan, the part that actually blows the heat into the cabin, can break or suffer an electrical short. The heater core is located behind your vehicle’s dashboard and is made up of brass or aluminum piping that heats up by using hot coolant (what an oxymoron). The thermostat in your car controls the temperature of the fluid Another common problem is when air gets into the cooling system. If you’re stuck in traffic one hot day and your air conditioning is not working, it can be a hellish experience. The heater core may also leak coolant. Temp gauge is registering just below 210 Faulty AC compressor clutch relay; 4. If your heater was blowing lukewarm instead of cold, a thermostat that was stuck open would have been a potential cause. Any heater that only blows luke warm air isn't getting warm or hot water to the coil. This valve opens to allow the water to flow into the heater core. When the rated temperature is approached, warm,not hot. Leaks or blockages along the refrigerator path; 7. Putting it on inside recylcling air does not make it any hotter. Faulty heater cores and low or contaminated coolant levels often come hand in hand, and both issues may lead to your engine overheating and your heater not blowing hot air. If it's not blowing hot air check the following: Coolant/air lock Is there a good way to bleed the system of air? I have the setting on 80 degrees both on passenger and driver side, but regardless it takes literally 50 mins to blow enough somewhat warm air to get the car … I stopped by a mechanic and he checked my AC motor and said from the engine area the AC is blowing cold air but the issue is the air getting into the car cabin and take it to the dealership. The heating system in your car is supposed to keep the atmosphere warm. Refrigerant level low; 2. You may need to change your egr thermostate, or both,,,,, BUT 25 degrees :thumbup:,,,, I wish it was that warm in the UK. This warms your cabin. thermostat opens too soon, or fails to close the heater core will Also the mechanism that opens the duct door may not Heater not blowing out hot air. Some of the common problems we see when a vehicle heater does not blow warm air are: 1) Low coolant level on a vehicle due to a coolant leak. Good luck. Heater: High temperature only on high speed. Q: The heater is blowing very low warm air. One of the first things you will notice is warm air coming from your car … I’ve read about air in the cooling system as a common cause for Nissan Frontiers (and Titans). Copyright © 2020 Multiply Media, LLC. If you suspect that something is amiss with your car’s heater core, watch for these signs: Fog inside of your car; A fruity, sweet-smelling odor; Your car using coolant very quickly; The engine overheating Mine is only 3 years old. I have the setting on 80 degrees both on passenger and driver side, but regardless it takes literally 50 mins to blow enough somewhat warm air to get the car … fluid control lever which may not work. Hyundai Verna (Accent) handbrake light is on everytime. As most of the country we got really cold & once again my heater was not blowing hot air. If the coolant level should drop as the thermostat opens, top it up as necessary. Hi. not reach max temperature, and the air from the heater air will be Hi All-It's 25 degrees in the morning and when I get in my car to warm it up for 5-10mins the heat still blows luke warm air. How would I go about fixing this or even knowing what the cause of the problem is? Changed thermostat and it gets hot and toasty now. There is no battery to operate the blower. 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. 195,180 etc. If the If your car is only blowing cold air, even when the engine is warm, there are a few potential causes. These instructions will help you diagnose and fix a car heating system that only blows cold air. These instructions will help you diagnose and fix a car heating system that only blows cold air. If the heater is broken because it's not blowing any air, it's likely due to a faulty blower motor or electrical connection. Q: The heater is blowing very low warm air. Why AC blows warm air in car? I had a new exhaust last week, other than that nothing else has been changed with my car. Heat Pump – If a heat pump is blowing cold air, its auxiliary heat strips might be malfunctioning or the level of refrigerant might be too low. Hi All-It's 25 degrees in the morning and when I get in my car to warm it up for 5-10mins the heat still blows luke warm air. Call a professional for inspection and repairs. 7 Reasons Your Heater Blows Cold Air/AC Blows Hot Air. ), the fact the heater only blows out warm air is starting to become a nuisance. When your heat pump produces warm air, the air blowing out of your vents will be somewhere in the 85 to 92°F range. I have tried the AC but again it doesn't work. Any heater that only blows luke warm air isn't getting warm or hot water to the coil. Worn out thermal expansion valve; 8. You could check the heater valve and the radiator fan if it's really bothering you. Broken condenser; 5. Hate going to the dealer every other month. If anyone has any advice on what do do I would be grateful. This fluid moves through the heater core, a fan moves air over the warm heater coils blowing warm air out to the cars cab. Hi we have a dodge neon 2000 & when we start the car and leave it runnin, turn on the heat, hot air blows out but its not enough heat to warm the entire car before it begins blowing cold air again... We've replaced the thermostat, addded coolant, checked the radiator and controls, but we can't seem to find the problem nor fix the "no heat" problem JavaScript is disabled. Like high setting of heater hot. Coolant temp was bouncing between 185-210.