So why is blowing warm air inside the car? The air conditioner has been working fine, until this morning. Thermostat; It may sound obvious, but the first thing you should check is the thermostat. This might be an easy and inexpensive fix of the AC blowing warm air in the car. To protect the components of over current, they placed a fuse. It is possible that you have turned bearing or damaged the connecting rods or pistons. A broken condenser means that the gas might be still turned into liquid, although the temperature is higher than the desired one. Decided to take it into a shop. It's blowing out hot air only. The condenser is the first component that is cooling the gas and as an effect this one takes liquid form. After the AC has been on for say 40-60 minutes air stops coming out of the vents. They are not that expensive and are easy to replace (most of the time). So is the service every 2 years a BS call? For this reason, it uses good connections, and proper quality wires. Yes, based on your description and testing, I would agree that the fuel pressure regulator is the most likely candidate for this problem. It is intermittent, some days … Average repair cost is $1,200 at 43,350 miles. If neither of those components were replaced when the A/C system was opened, start by replacing them both and recharging the system. How To Tell If Oil Pressure Sensor Is Bad. This is a video tutorial on how to diagnose and fix a AC System in an automobile. A clutch is used to engage or disengage the operation of the compressor. When When you get into your vehicle, you simply expect the air conditioner or the heater to work when you need them. The heat still works. What Are The Symptoms Of A Bad Voltage Regulator? Check also a nice video which is showing the process discussed above: There might be several reasons AC blows warm air inside the car, based on the above explanation. Whenever the A/C system has a leak, not only does the refrigerant leak out, but normal contamination and moisture in the air gets into the A/C system through that leak. Heater fan blows the air from the outside over the evaporator which cools down the air that it’s entering the cabin. The high and low pressure sides of the A/C system are connected. During driving, fan blades can get broken or even the fan itself can get damaged. For instance, if the compressor is not engaging when you press the AC ON button and everything else, it’s excluded. For most car owners, their gaskets are not something that they think about until one of them begins to malfunction. During water pump replacement, it is recommended that the timing belt also be replaced, since it needs to be removed while the water pump is being replaced.... Hello there! Turning the dial on blue doesn't blow cold air. As I drove along for about 10-15 mins, my AC started to blow warm air, then back to cold air, then finally settled back to warm air. They are not that expensive and are easy to replace (most of the time). The most recently reported issues are listed below. technicians, Trusted mechanics, rated by thousands of happy car What can i do to remedy this problem. The relay it’s based on a mechanical circuit so you can slowly knock it to see if the clutch it’s starting to engage. How To Tell If You Have A Bad Wheel Bearing. So I have this weird situation going on. If I drive the car after it has been parked while the AC is on then the air starts to turn cold again again, but only if I am driving around. Turning the dial on blue doesn't blow cold air. When you hit the AC on the button inside your car, the compressor engages. Air Conditioner is Blowing Hot Air. Common causes for AC to blow hot air; In a previous post, one of our team members told a story of coming home at the end of the day to a soaking wet carpet caused by issues with his air conditioning system. When this switch fails your air conditioning is dead in the water. Fix it well so later you will not have additional problems. The thermostat setting for cooling and the indoor fan is running, but warm is coming from the supply vents. The AC is not blowing cold air at all. A defective condenser fan. Without knowing which model you have I can only offer general advice. I bought a new condenser replaced the old one to find out that the "new" condenser was faulty (leaking out the refrigerant). July 24, 2010. Will Housh July 12, 2016. During a performance test if the compressor clutch is engaging, and the gauge readings are not moving, this would indicate a possible AC compressor failure. I have a 2005 Mazda Tribute. Is hot outside and your AC blows warm air in car? 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