Drivers changed air temperature far more often than they change the mode (defrost, floor heat, dash vents, etc. My car has 118000 miles. The coolant absorbs the heat from the engine, causing it to become hot. In a dual zone system, you wind up with a blows cold one side, hot on other side condition. ), so the temperature actuators generally fail first. Car owners rely on their air conditioners to cool the interior quickly when they sit behind the wheel. If I am running defrost it is basically the same hot for a little while and then cold untill i turn it off for a little bit. Why Is My Car Blowing Hot Air Instead of Cold? In my Volvo s40 the air conditioner only blows hot air fist thing in the morning but after 5 minutes of driving it starts to work perfect. 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 coolant return heater hose should … There are a few different factors that could be causing the confusion with the airflow. If the car was low on coolant, and the heater is blowing cold air, this sounds like a possible water pump failure. Why is the Heater Blowing Cold Air Instead of Hot? I have a 2003 Chevy Silverado my AC was blowing cool air not cold up until a couple days ago. Then I added some until the gauge read in the blue where it should be but now my system only blows hot air I have no clue why. I have tried the AC but again it doesn't work. 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. A car heater system is essential during the winter or early in the morning when you need to heat your car for that comfortable ambience to work. A car’s cabin will heat up as the engine’s coolant heats up. 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. Somebody help me please. I bought some air conditioning recharging fluid put the gauge on there so that it was a little low. My car … When the A/C is blowing hot air, you can get frustrated, but there is no reason to lose your cool. It can be very uncomfortable and inconvenient if your car's heater system malfunctions as temperatures drop, and instead blows out cold air. but if I just stay in the drive way with the engine on the air will only blow hot air. Like high setting of heater hot. The liquid then flows through the radiator and the air absorbs the heat and uses a fan to push it through your vents. 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. To see if this is the issue, add some more coolant under the hood. My fiancee's Impala exhibited the same symptoms and it turned out to be the water pump had blown a seal and was ejecting coolant. If your vehicle is lacking the proper amount of coolant, that hot air isn’t going to make it inside your car. This is actually a common problem that doesn’t really have a simple answer. Another way to determine why you are faced with a problem of car air conditioner blowing hot air is to see when the unit blows warm air. I have the vent setting on cold, the heater off, and yet it still blows HOT HOT air. When that happens, the HVAC system can be stuck on blows cold air or blows hot air. With the airflow ), so the temperature actuators generally fail first recharging fluid put the gauge on so. Your cool there are a few different factors that could be causing the with... Inconvenient if your car under the hood if i just stay in the drive way with the engine, it... 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