If you’re scouring the web for answers to “why is my car AC blowing hot air?” – then you’ve come to the right place. Although an automotive AC system has few moving parts, diagnosing why your car is blowing warm air can be tricky. All rights reserved. And that eventually cools the refrigerant. The Dodge owner's manual contradicts this and shows no 10 amp fuse for the purpose of a blower relay, inside the junction box. This condenser has cooled and fans to push the air through. My problem is on a 1996 Dodge Caravan 3.3 liter. If our certified auto technicians find a problem, we will let you know about it so you can have it fixed before it becomes a major problem. We will test the pressure and use special dyes to pinpoint the leak. When any wire is broken that connects to the AC system, it creates the issue. No matter it’s your home ac or the car ac, there is a device named condenser in each of them. In the case of this Dodge's blower, the answer was fairly easy to discern. As did the author of this letter, you want your fan back. 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. Periodically check the level and condition of the coolant. It then feeds that cool air into the engine. It has been to the car dealer eight times. That could be a reason to make your car ac not blowing cold air consistently. Faulty Compressor. With each service, we conduct a courtesy inspection of all the major engine systems. If the fan is damaged and does not operate at full power, it will not cool down the heat coming from the refrigerant. Follow these steps to fix the problem. My blower motor does come on. The Front Blower Motor Relay (also known as the AC Relay), located behind the junction block with a black connector, B05, is the culprit. But a climate control system with no fan to push the air around is anything but controlled. Also the dash panel gets hot as well. Warm Air is Coming Out Instead of Cold. Haynes say it is located in the PDC under the Hood, along with a 40 amp blower fuse in the PDC. This heater core then passes the hot air it generates into the vehicle with a blower fan. Haynes also states this blower relay is powered via a fuse in the junction box from under the dash, #12, 10 amp. The easiest way to maintain the entire cooling and heating system is to bring your vehicle to our auto repair shop in Byram, New Jersey. Each time a spark ignites the fuel in the engine, there’s a tiny explosion that generates a lot of heat. The trouble relates to the blower motor and its activation. Here are some of … Having your car’s air conditioning go out suddenly can ruin your day fast. What’s wrong? Dodge owners manual shows the 40 amp blower fuse, #25, but does not mention any blower relay in the PDC. It’s really quite ingenious. Ask the mechanic to check for leak then repair if necessary. The first thing to check if your car air conditioner does not blow cold air is the condenser fan. If that’s not what is causing it, check the engine’s condenser. 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 condenser, while looking like a radiator, acts as a cooler on the ambient temperature that blows through the car. It contains several joints for better rigidity and performance. One of the most common problems with an automotive climate control system is a lack of blower pressure or no blower at all. I’ll also talk about how you can maintain your heating and cooling system to minimize future problems. Take note that a clogged condenser is just a contributing factor to why the car air conditioning blows hot air and not blowing cold air. Can you help? Note, there is no burnt or corroded wiring. 7 Possible Causes, Troubleshooting a No Spark Problem in Honda Accord. Your air conditioner is great—when it’s working well. Some cars have a shut off feature that will disengage the a/c compressor if your engine is under duress. 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. A heater that’s not working could mean there is a problem somewhere else in the cooling system. Sometimes blower motors and/or their resistors will fail and stop pushing both hot and cold air through the vents. If your air conditioning is blowing warm or even hot air, there are a few potential causes. The problem of a car air conditioner blowing hot air on one side is mostly seen in cars which have a dual zone climate control system. If your car AC is blowing hot air, it is very likely that the refrigerant in the unit is low. Check out what he's been through, and why he should have asked an expert from the start. When it is not, which of course occurs on the most brutally hot day of the year, the A/C suddenly becomes a cruel joke, blowing warm, stale air into your vehicle. A refrigerant is a special kind of gas (but compressed to liquid) that gives the unit its cooling ability. You should also have the coolant flushed and replaced on a regular schedule. By properly maintaining your car’s cooling system, you are maintaining the heating system too. From there, the water circulates back to the starting point so it can flow through the system again. If you are able to locate the wiring and find any malfunctioning there, use the electrical tape to mend the wiring. Step 3: Check the strength of airflow. The Haynes manual says the blower is activated by a relay. To fix any blower, the first things to look at are the fuses, relays, and electrical connections. Bring the car to a reputable auto shop that specializes in car air conditioning system. Hello, We have a 2005 Mercury Marquis, and the air conditioning keeps blowing hot air. 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. Problems in the Condenser. This blog post will give you a good idea of what might be causing the problem with your car heater. I need to find the location of this front blower relay and the fuse that powers it. When it does happen, you're left with a miserably underpowered heat or AC system. 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. Its job is to cool the warm refrigerant, and that makes the air cold when it reaches the evaporator. As you get in your car and turn on your AC, you probably expect it to be blowing hot air for the first minute or two until the system cycles through enough to cool it. Click here to schedule an appointment for car heater repair at Geller’s Automotive. Bad ac compressor on car Have you been taking care of these vehicle safety features. 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. Some cars have a shut off feature that will disengage your car air conditioner compressor if your engine is under duress. In that case, some joints may leak or lose while operations. Your AC Refrigerant is Leaking. It has A/C but is a short body and has no rear heat or A/C. This typically happens if the engine is too hot, so be sure to check your car’s temperature. The air blowing out of my car heater isn’t hot. Poor maintenance of the air conditioning unit is the main culprit for car air conditioner not blowing cold air when idling. This is often the case. you're left with a miserably underpowered heat or AC system. Blog – Expert Automotive Info from Geller’s Automotive in Byram, NJ. Why is My Car AC Blowing Hot Air? Copyright © This typically happens if the engine is too hot, so be sure to check the engine temperature. All the relays in the PDC have designated legends on the cover, but none indicate they are for the front blower relay. However, attempting this without all of the info you need, destines your electrical troubleshooting process to failure. If it’s hot in a situation of car air conditioner blowing hot … Car not blowing hot air? The radiator, thermostat, belts, water pump and hoses are responsible for circulating water to the engine to keep it from overheating. The most common causes of broken air conditioning are leaks or compressor issues. First, the air conditioner may not be the problem. Low Refrigerant Levels. Such systems allow you to control the temperature in the passenger compartment of the cars as per your comfort level. There’s not much worse than expecting an ice-cold breeze, but instead, you’re met with a blast of heat. As we know, AC connection of a car is done with the wire that is not connected straight. That said, if you're able to obtain a high-quality manual, it will pay for itself several times over in guidance. Repair or Replace Vehicle: Questions and Considerations. All of these are fairly easy to check. Here are a few of the more common reasons that’s causing the car heater to not work properly: It’s simple. 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. The most common comfortable temperature people want inside their car … That means a trickle out of your vents instead of the rush you asked for. When it isn’t, driving in your car can be uncomfortable, especially on hot summer days. There are many components and other systems that can cause warm air to come from the vents. 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. An automobile air conditioning system cools the air inside your vehicle by removing heat through a simple four-phase cycle. 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. When car ac blowing hot air, the possibility of having a damaged wiring system is high. Andover, Byram, Hopatcong, Lake Hopatcong, Ledgewood, Newton, Stanhope, Succasunna, and Roxbury. https://thecarsguide.com/ac-blows-warm-air-in-car-causes-and-fixes There are any number of reasons cold air or no air is coming through the vents. 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. Before going into greater detail on why the heater may not be working and how you can maintain the system, let’s talk about the heater in your car. Why does the air conditioning keep blowing hot air 8 Answers. If it’s hot in a situation of car air conditioner blowing hot air , then it’s an engine problem. 2021 Geller's Automotive. The most common cause of hot air coming from car AC vents is low levels of refrigerant. Checking the system from time to time is crucial to keep it in a good condition. Your vehicle should have a complete relay diagram showing the location of all of the vehicle's electrical components such as fuses and relays. There could be several reasons behind this problem. 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? 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. I work in the telephone business and am very familiar with DC wiring. Don’t forget to inspect the belts and hoses and have them replaced when they show signs of excessive wear. If you suspect a refrigerant leak, take your car to General Automotive. But a climate control system with no fan to push the air around is anything but controlled If your air pressure is normal but the air is hot Check if the blower motor receives power. Any number of culprits could be causing your car A/C to blow cold then warm air, including: A Leak in the A/C System A small refrigerant leak is the most common reason a … Look under the hood at the AC compressor clutch. Did you know it’s part of the cooling system? 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. 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. 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