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