AC not blowing cold air

The AC was blowing hot air. I recently added Freon, and cool air blew for a while. Now, it is not blowing cold air, or is only moderately cold at best.
Experienced mechanics share their insights in answering this question :
Hi. There are many different possibilities here. Most A/C systems stop working due to switches in the system failing or a bad clutch on the compressor. You may have also just overcharged you’re A/C system or have a Freon leak. I would have a certified mechanic take a look at it and identify your air conditioning problem.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

The most common reasons a Honda Accord ac isn`t working are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor. You may not realize there`s a refrigerant leak until the air conditioner stops blowing cold.
If your air conditioner is running, but not lowering temperatures inside, one issue could be a blocked or clogged condenser coil. When operating correctly, the condenser fan draws air into the outdoor unit through the condenser coil to pull heat energy out of your home.
Common Reasons AC Doesn`t Run Cold

The most common causes of broken air conditioning leaks or compression issues. If you are feeling cool — but not cold — air, the issue could be a clogged filter, a problem with the cooling fan, signs of radiator trouble, or it could simply mean it`s time to recharge your AC.

If the compressor clutch engages and turns the compressor, but the A/C still does not blow cold air, the system is probably low on refrigerant and needs to be recharged.
A second reason for the air conditioning unit to suddenly prefer blowing warm air may be because the compressor itself has gone bad. The main function of the compressor is to pressurize the contents in the refrigerant, and then pump it throughout the necessary components of the AC.
One of the most common reasons your car AC is blowing hot air is because of a refrigerant issue—specifically, a loss of refrigerant. This loss of refrigerant can occur either due to a leak or because your car`s refrigerant levels are too low.
Warmer Air Is Flowing Out

When your AC turns on, you expect cool air to come out of the vents. Warmer airflow, just like diminished airflow, is also a sign of AC compressor failure. If you feel warmer air, call your professional to inspect the compressor for leaks.

Look for it first around on the exterior of your machine, especially along the bottom edge near the ground. An AC`s reset button is typically red and visible, so it should be easy to spot. If you don`t see a reset button on the outside, it could be located inside the unit behind the service panel.
Why do I get hot air from my Accord A/C? If your car`s air conditioning isn`t blowing cold air at all (or it tries, then turns warm), you could have a clogged expansion valve, a faulty compressor clutch, a leak, or a malfunctioning fuse in the system.
The air-conditioning system in a car works by manipulating refrigerant between a liquid and a gaseous state. As the refrigerant changes states, it absorbs heat and humidity from the vehicle and allows the system to give off cool, dry air.
You`ll most likely hear a quiet clicking sound followed by air moving through the ductwork. You can also place your hand on a vent to feel for hot or cold air. If you don`t hear or feel anything within a minute or two of making the changes, your thermostat may need to be replaced.
Your air conditioner`s internal circuitry needs some time to reset after you turn it back on. This can take approximately a half-hour, so sit tight for about 30 minutes. Turn your air conditioner back on at the thermostat. After 30 minutes have passed, turn your air conditioner back on at the thermostat.
The method to reset your thermostat will vary depending on the model. Common methods for resetting a thermostat include installing the battery backward for five seconds, pushing a recessed reset button with a pin or paper clip, or shutting off the breaker to the thermostat for 30 seconds.
If your air conditioner is not working, it can be caused by a variety of reasons. Common reasons include dirty or blocked air filters. In other cases, there can be issues with your compressor or refrigerant. This can lead to your ac not blowing air, not turning on, or it just doesn`t seem to be working properly.
HVAC experts say that it`s completely fine for your AC to run all day. Some AC units are designed to work at full capacity, and some people get this AC installed in Everett, WA. It`s always better to schedule an annual check and get your AC repair in Everett, WA, when needed.
To reset a malfunctioning Honda Accord climate control system, turn on accessory mode, then hold the defrost and OFF buttons on your climate control unit until the light has blinked five times.
If there is the voltage on the “line” side, test for voltage on the “load” side of the fuses by placing the meter`s leads on the load wire lugs. If you read voltage on this side(220-240V), this means the current is flowing through the fuse. If you get a zero-voltage reading on the load, this means your fuse is blown.
Freon, or coolant, is the chemical in the air conditioning system that cools the air.
The short answer is yes, coolant can affect air conditioning performance in a number of ways. Typically, coolant can affect your AC`s temperature, humidity, and airflow. Your AC`s temperature may be affected by the proximity of your car`s interior to your engine.
A car`s air conditioning should be recharged every two years or so. However, if you notice any signs that your AC needs to be recharged, it`s important to take your car in as soon as possible. Taking care of your car`s AC is important for several reasons.
Compressors generally last the lifetime of a car, or approximately 12 to 15+ years depending on how well the car is looked after. In saying that, it`s important that you regularly check up on and service your car to prevent premature failure.
Locate the high pressure switch near the compressor (a cylindrical device piped into the refrigeration system with two wires a red button on the top). Push in the button to reset. Push the rocker switch to restart the unit.
When a thermostat is in recovery mode, this simply means it is recovering from being in an energy-saving mode. During recovery mode, your thermostat is working toward achieving a newer temperature that is cooler or warmer than the outside air.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Overheats When Blowing Warm With Heat & AC But Not When Blowing Cold AC
ANSWER : Hello, thank you for writing in. There are so many different codes being triggered, that it is unlikely all of these systems are having issues at once. We need to focus in on the fact the engine is overheating at all. You will want to check the level and condition of the coolant and the overflow tank. If the level is full then you may have an issue with the thermostat, radiator cap, or water pump. These can all be tested and changed relatively easily. If the main cooling system is okay, you will want to look into the heater core and climate control module. For more diagnostic help, contact our service department to schedule an appointment.

Read Full Q/A … : AC not blowing cold air

everytime I turn my car on the ac starts to blow air even if I switch it off. it won’t blow cold air or heat.
ANSWER : Hi there. Based on your question and input, it looks like your AC control switches are damaged, causing the vents to activate even if the switch is not activated. This is sometimes an electrical problem, as it could be triggered by a damaged electrical relay. You might want to have a professional mechanic complete an AC is not working inspection, so they can determine what is causing this issue you’re experiencing and recommend the right repair.

Read Full Q/A … : AC not blowing cold air

Air conditioning blowing mildly cold air on the coldest setting, turned off/on again, now blowing cold air, should it be checked?
ANSWER : If you are getting ready for a long trip and suspect the cooling fan may be not coming on for the radiator and a/c then you should have the a/c and cooling system performanced checked before trip. Nothing worse than breaking down when out of town in a strange area.

Read Full Q/A … : AC not blowing cold air

My air is blowing cold-hot-cold-hot-cold-hot…
ANSWER : It is possible that you have a leak in the AC system. There are pressure switches that will turn off the compressor if the pressure is too high or too low. The low refrigerant level could cause the AC compressor to cycle on and off. If you would like to have this done, a certified technician from YourMechanic can come to your car’s location to diagnose the AC system and make the correct repair.

Read Full Q/A … : AC not blowing cold air

Hot air mixed with cold blows from air conditioning
ANSWER : Hey there. You will most likely have to have a mechanic bypass the heater coolant lines to have this resolved. Your A/C may not be controlling the air flow inside the evaporator correctly out of the vents and may be the blend door actuator stuck in the heat position. Have the AC system diagnosed first before bypassing the heater.

Read Full Q/A … : AC not blowing cold air

AC stopped blowing cold air
ANSWER : Hello! There are a few potential causes of your problem that I recommend inspecting. I would first check the refrigerant levels of the system, to ensure that it has adequate pressure. If the pressure is low, I suggest having a technician inspect the system for leaks; I think this is unlikely, since the AC stopped working so suddenly. The most likely case is that there is an electrical issue, such as a blown fuse or open circuit, although I would also recommend checking the performance of the AC compressor. Please keep in mind that the Federal Government requires all AC work or repair to be done by an EPA-certified technician. YourMechanic can send an EPA-certified technician to the location of your Expedition to inspect your AC system, and recommend the best path to repair.

Read Full Q/A … : AC not blowing cold air

My heater is blowing air through the driver side air vents but is blowing cold air through the passenger side and rear console ven
ANSWER : Hi there:

Climate controlled vehicles have multiple electrical relays that open and close vents to maintain the desired temperature. In some instances, these relays can wear out overtime. However, it’s also common for debris to clog up vents (especially side vents) which may restrict the flow of cool air. The best way to determine why your AC is not working efficiently, it might be best to have a professional mechanic complete a AC inspection; so they can pinpoint the source of your issues and recommend the right repairs.

Read Full Q/A … : AC not blowing cold air

While driving defroster set to hot blows hot air as it should, while idling it is blowing cold air.
ANSWER : First, the coolant level should be checked to make sure the radiator is full. While the overflow tank may be full, the radiator cap must be taken off to check the level inside the radiator. If you find the level is very low, you have a coolant leak that must be fixed. If coolant levels are normal, an engine thermostat or heater control problem may be what you’re experiencing. Consider hiring an experienced technician like one from YourMechanic who can come out and take a closer look at your lack of heat concern to offer a more personal diagnosis.

Read Full Q/A … : AC not blowing cold air