All of these are fairly easy to check. How to Fix It If Your Car Heater Isn't Blowing Any 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. And that eventually cools the refrigerant. Your AC Refrigerant is Leaking. Low Refrigerant Levels. If your air pressure is normal but the air is hot Most late-model cars use electric motors (called actuators) to change the air temperature and direction of the airflow by opening and closing flaps in the heater box under the dash. This heater core then passes the hot air it generates into the vehicle with a blower fan. By properly maintaining your car’s cooling system, you are maintaining the heating system too. https://thecarsguide.com/ac-blows-warm-air-in-car-causes-and-fixes In the case of this Dodge's blower, the answer was fairly easy to discern. Periodically check the level and condition of the coolant. When any wire is broken that connects to the AC system, it creates the issue. There’s not much worse than expecting an ice-cold breeze, but instead, you’re met with a blast of heat. The most common causes of broken air conditioning are leaks or compressor issues. Such systems allow you to control the temperature in the passenger compartment of the cars as per your comfort level. If your air conditioner is blowing warm air, or just not working properly, it is best to schedule service … It’s really quite ingenious. If you do not feel any air or if you only feel air coming through the vents on certain settings, the problem may lie with the AC’s blower motor or the blower motor resistor. It will still work with no fan, and you'll usually still be able to control the temperature of the air that is blowing or trickling, out. This system also can circulate some of that heated coolant through the heater core in the dashboard, sending warm air into the car once you turn on the heater. There are any number of reasons cold air or no air is coming through the vents. A refrigerant is a special kind of gas (but compressed to liquid) that gives the unit its cooling ability. It contains several joints for better rigidity and performance. The amount of hot air and which direction it blows are controlled by the buttons and switches on your dash, which direct the heater valves and the car’s blower fan. Can you help? Your car’s air conditioner is supposed to provide you comfortable cool air inside the cabin, but if your car’s A/C is blowing hot air, there must be something wrong with the system. All the relays in the PDC have designated legends on the cover, but none indicate they are for the front blower relay. My blower motor does come on. Poor maintenance of the air conditioning unit is the main culprit for car air conditioner not blowing cold air when idling. If that’s the case and you don’t get it fixed, you could wind up with a major repair expense, or worse… an engine that needs to be replaced. There could be several reasons behind this problem. Hello, We have a 2005 Mercury Marquis, and the air conditioning keeps blowing hot air. Matthew Wright has been a freelance writer and editor for over 10 years and an automotive repair professional for three decades specializing in European vintage vehicles. The Haynes manual says the blower is activated by a relay. No matter it’s your home ac or the car ac, there is a device named condenser in each of them. This typically happens if the engine is too hot, so be sure to check the engine temperature. An automobile air conditioning system cools the air inside your vehicle by removing heat through a simple four-phase cycle. Look under the hood at the AC compressor clutch. It has A/C but is a short body and has no rear heat or A/C. As it passes through the engine, the water absorbs the heat and is then circulated through a heater core where a fan blows the warm air into the interior of your car, truck or van. This typically happens if the engine is too hot, so be sure to check your car’s temperature. Dodge owners manual shows the 40 amp blower fuse, #25, but does not mention any blower relay in the PDC. Why is My Car AC Blowing Hot Air? The trouble relates to the blower motor and its activation. If that’s not what is causing it, check the engine’s condenser. Bad ac compressor on car Check out what he's been through, and why he should have asked an expert from the start. Car not blowing hot air? The best ​repair manual is always a factory manual, but these can either be hard to find or many times more expensive than a "consumer friendly" repair manual. Copyright © This condenser has cooled and fans to push the air through. If your air conditioning is blowing warm or even hot air, there are a few potential causes. As we know, AC connection of a car is done with the wire that is not connected straight. This is often the case. But a climate control system with no fan to push the air around is anything but controlled If it’s hot in a situation of car air conditioner blowing hot air , then it’s an engine problem. Many different things can go wrong here causing the whole system to work poorly or not … Although an automotive AC system has few moving parts, diagnosing why your car is blowing warm air can be tricky. Bring the car to a reputable auto shop that specializes in car air conditioning system. Your air conditioner is great—when it’s working well. 7 Possible Causes, Troubleshooting a No Spark Problem in Honda Accord. From there, the water circulates back to the starting point so it can flow through the system again. Some cars have a shut off feature that will disengage your car air conditioner compressor if your engine is under duress. I’ll also talk about how you can maintain your heating and cooling system to minimize future problems. Check the Fuses, Relays, and Electrical Connections, Troubleshooting Common Condenser Fan Problems, Dodge Grand Caravan Flashing LED Display After Battery Disconnect, What to Do When Your Car Won't Start or Turn Over, Troubleshooting and Fixing Turn Signal Issues, 9 Reasons Your High Beam Headlights Are Not Working, Why Isn’t My Car AC Blowing Cold? When it does happen, you're left with a miserably underpowered heat or AC system. The condenser, while looking like a radiator, acts as a cooler on the ambient temperature that blows through the car. Have you been taking care of these vehicle safety features. Step 3: Check the strength of airflow. The first thing to check if your car air conditioner does not blow cold air is the condenser fan. The Dodge owner's manual contradicts this and shows no 10 amp fuse for the purpose of a blower relay, inside the junction box. 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