If you need to recharge the a/c system in your car, Call Us Today. Auto A/C Repair LLC. Technicians come to your home or office in Miami and will service the AC in your vehicle at your place.
Auto A/C Repair LLC. technicians will :
Recover the old refrigerant from the vehicle AC system.
Vacuum the car AC system to make sure there is no moisture or non-condensable gases in the AC system.
Recharge the car AC system with the exact refrigerant amount recommended by the manufacturer
After the Air conditioning system is recharged up to manufacturer specifications, the technician will check the AC system operating pressures.
The technician will do an AC system oil balance.
WHAT IS AN A/C RECHARGE?
The A/C Recharge service will bring the amount of refrigerant and oil circulating in your vehicle’s AC system up to the exact manufacturer specifications. The refrigerant is where the heat from the vehicle’s cabin is stored and moved out to the outside of the vehicle where is transferred to the outside ambient air. To cool down the driver and passenger compartment fast and properly the exact amount of refrigerant specified by the manufacturer must be circulated in the air conditioning system.
HOW DO YOU KNOW IF YOUR CAR’S A/C NEEDS TO BE RECHARGED?
The AC system is not cooling down the interior of the vehicle as fast as it used to.
The car interior temperature never gets cold enough.
A low freon charge could be the result of a leak in any component of the car ac system.
A/C compressor turning on and off fast(Compressor Over cycling).
Properly fixing a low freon condition involves more than just recharging the a/c system. If there is a leak in the system it must be fixed, otherwise the freon charge could only last a couple hours or days before it is low again.
Refrigerant leaks and refrigerant oil leaks happen together ,just at different rates. Recharging the freon in the car ac system without balancing and recharging the oil could lead to compressor failure
HOW OFTEN DOES A CAR A/C NEED TO BE RECHARGED?
You will need an AC freon recharge as soon as the system is low or after any repair that involves opening the closed loop sealed air conditioning system is performed in your vehicle.
WHY YOU SHOULD LEAVE IT TO THE PROFESSIONALS
The only accurate method to recharge an automotive a/c system that requires a critical charge is to weigh the refrigerant (Freon) into the system using a manifold gauge set and calibrated special scale for this purpose. Recharging the a/c system by pressure, which is the method used when the system is recharged using small refrigerant can and a gauge is inaccurate, and virtually impossible to charge the system according to manufacturer specifications.
WHERE TO GET AN A/C RECHARGE
Is it time to get your vehicle’s air conditioning system recharged ? Schedule an appointment today at Auto A/C Repair LLC. for car A/C Recharge and repair services. One of our ASE certified technicians will come to your home or office to perform the service at your place.
Faulty valve, on electronically controlled variable displacement a/c compressor
Faulty A/C Compressor Clutch Relay
Faulty A/C Compressor clutch coil
Inoperative A/C Compressor
Engine cooling system affecting A/C operation
Leaking Heater valve
Externally restricted A/C Condenser
Internally restricted A/C Condenser
Externally restricted engine cooling radiator
Faulty Outside Ambient Temperature sensor
Faulty Pressure sensor/switch
Faulty Evaporator Temperature Sensor
Faulty electric wiring
Restricted A/C Cabin-filter
Restricted evaporator coil
A/C Door Actuator malfunction
A/C Temperature Door Actuator stuck in the heat position
Faulty Expansion Valve
Faulty Fixed Orifice Tube
Bad drive belt tensioner
Worn down a/c compressor drive belt
Why is my car AC running but not cooling?
Newer automotive air conditioner systems have the a/c compressor always operating. The a/c compressor pulley is constantly rotating but the a/c compressor output is controlled in many cases by the ECM or the PCM in the vehicle. The Powertrain control module (PCM) or Electronic controlled Module (ECM) will receive input from different sensors in the vehicle and will command a/c compressor output accordingly.
Do you need assistance with a poor a/c cooling performance ?
The best way to test a car condenser is by knowing how it should be operating correctly. You can compare the operation and determine if there are any issues with the condenser. A quick and easy test could be performed without using any special tools.
Start the engine
Turn the A/C on
A/C set to Max Cold and Max blower operation
Run the A/C for a few minutes to let the system stabilize
On the engine compartment locate the condenser(It is in front of the car and looks like the radiator)
Feel the temperature of the condenser coil beginning from the top of the condenser to the bottom of the condenser.
A good operating condenser should be hot at the top warm on the middle of the condenser coil and cool on the bottom part of the coil surface.
Results of the condenser Test
Cold spot on the condenser coil surface indicates a problem and must be corrected
Hot from top to bottom condenser coil indicates a problem and must be corrected
Normal operation of an a/c condenser
The Hot superheated gas from the compressor enters the top of the condenser at 200 F. The condensing temperature is going to be about 30 F warmer than the outside(ambient) air.
The outside air temperature is 95 F. The condensing temperature is 95 F + 30 F = 125 F. The refrigerant must be cooled to 125 F (200 F – 125 F) in the first part of the condenser coil. This is call desuperheating. It is the first job of the condenser.
Partway through the condenser coil the superheat is removed and the refrigerant reaches the actual condensing temperature of 125 F ; liquid begins to form in the coil. Liquid will continue to form at the condensing temperature of 125 F until all the vapor has turned to 100 % liquid. This is called the Latent Heat of Condensation.
The liquid can now reject sensible heat and subcool to below the 125 F condensing temperature. Any liquid below 125 F condensing temperature is referred to as a subcooled liquid.
The liquid in the bottom of the condenser draining into the receiver or expansion device depending on the type of system may cool to 110 F. This would give the liquid 15 F(125 F – 110 F) of subcooling.
Impact of debris and damage of the car condenser and temperature differential.
All air-cooled condensers do not have the same exact 30 F relationship with the ambient air. It is good practice to determine and record the temperature relationship between the air and refrigerant at start-up time. Then if the relationship were to change, you would suspect trouble, such as a dirty condenser, system contaminated or an overcharge of refrigerant.
A well-maintained clean condenser will have a close 30 F or even lower temperature relationship with the ambient air, compared with a road debris restricted ac condenser. The efficiency of the condenser will vary according to the condenser design, size and quality of the materials used for its construction. The operation of the a/c condenser depends greatly on the flow speed and volume of air going through its fins to accelerate the heat exchange between the refrigerant and the ambient air.
Do you need assistance checking your car ac condenser ?
Call Auto A/C Repair LLC. Today ! Auto A/C Repair LLC. provides car ac repairs on site service in your area. ASE certified mechanics can service your automotive ac system at your home or office. A/C specialist near you will take care of your air conditioning system.
My car AC compressor has blown 15 minutes after a regas/recharge. What could be the cause?
Vehicle ac evacuation and recharge near me
Before replacing any components that carry refrigerant through the system, the existing refrigerant must be removed. On a typical 80° F Day, a fully charged system will have over 80 psi of pressure. Opening a fitting or union will allow the refrigerant to escape into the atmosphere. Such a procedure I not only extremely unsafe; it is illegal and environmentally harmful.
How much does it cost to evacuate and recharge AC?
Do you have to evacuate AC system before recharging?
After repairs have been performed on the A/C system, or any time a system has been opened, it must be evacuated. Air and moisture will enter an open system. Moisture from humidity in the air can form destructive chemicals inside the system when mixed with refrigerant and oil, and can cause a breakdown of the newer synthetic oils used in R 134A systems.
Also water in the system can ice up in the expansion valve and block the refrigerant flow. These chemicals can corrode metals and attack rubber parts.
During evacuation, as the pressure inside the system lowers, so does the boiling point of the water in the system. Water can vaporize and be withdrawn by the vacuum pump.
How do you evacuate an AC system on a car?
You can use either a charging station or stand-alone vacuum pump. According to EPA ,when evacuating a vapor compression system, the vacuum pump should be capable of pulling 500 microns (29.92 hg.) of vacuum. After properly connecting the service hoses and removing any refrigerant , start the vacuum pump and open both sides of the system, exposing it to vacuum. Once the vacuum level reaches specification, continue pulling the vacuum between 5-60 mins depending on the type of system repair and the time the ac system has been opened. Close all valves and turn the vacuum pump off. Wait for 1-15 minutes and note any loss of vacuum using your ac manifold gauges. If vacuum is lost, it means system leakage is present.
If the vacuum pump is turned off too soon, some of the moisture in the system will be left behind. Before turning off the pump, close off the A/C system to the atmosphere to prevent air from being drawn back in.
Where can I find a professional auto air conditioning service?
We specialize on automotive air conditioning systems. We have ASE certified auto ac mechanics near you.
Inaccurate refrigerant(freon) charges increase the chances of auto ac compressor lock up. Modern auto a/c systems require super accurate charging. Being off as little as 2 ounces can cause problems.R-134a and R-1234yf ac system tolerances require charge rates that must remain or should be charged within +/- 5% of OEM recommendation. SAE J2788 requires charge accuracy of +/- one-half ounce.
Attempting to charge by cans is History !!
Car ac compressor lock up due to improper compressor lubrication.
Refrigerant moves the oil inside the ac system and helps to cool down the ac compressor. An undercharge or overcharge refrigerant condition will increase the air conditioning compressor temperature and a change in oil viscosity and lubrication characteristics. Most compressor lock ups are the result of a lubrication problem.
AC compressors lock up due to ac system contamination
Auto ac compressor damage may occur because of system contamination. Anything more than the correct type of freon and oil is a contaminant. The use of sealers to fix small refrigerant leaks will cause oil and refrigerant contamination and ultimately ac compressor lock up. Sealer can’t be removed from the A/C systems. The contaminated components must be replaced.
The use of excessive Dye to help finding leaks in the ac system could create a contamination problem as well, increasing the normal working pressure of the ac compressor and the overall efficiency of the air conditioning system.
Improperly replacing any component in the automotive air conditioning system where the system must be opened for replacement of the damaged part and not evacuating the system before recharging it with the proper amount and type of refrigerant will contaminate the ac system with air. Air and moisture inside the system will create excessively high operating pressures and temperatures and eventually could lead to a compressor lock up.
Inefficient ac condensers and air conditioning compressor lock up
Debris on the condenser will affect the desuperheat, condensation and subcooling processes happening in the auto ac condenser.AC condenser with bent or missing fins will be unable to efficiently operate. An inefficient ac condenser will cause an auto ac compressor to lock up.
Low Refrigerant charge and electronically controlled compressor lock up ?
The car engines in vehicles with the clutchless compressors should not be run without refrigerant in the A/C system. Without refrigerant to move the oil, the auto ac compressor may not be properly lubricated and compressor lock up may result.
Do you need assistance inspecting the state of your ac compressor in your vehicle?
The receiver drier is a storage tank for the liquid refrigerant from the condenser. It also contains a bag of desiccant.
The purpose of the desiccant is to absorb any moisture that might enter the system during assembly or service. The receiver drier is often neglected when the air conditioning system is serviced or repaired. Failure to replace it can lead to poor system performance or replacement part failure.
When should I change my AC filter drier?
It is recommended that the receiver drier and /or its desiccant be changed whenever a component is replaced, the system has lost the refrigerant charge, or the system has been open to the atmosphere for any length of time.
AC receiver drier refrigerant flow restriction.
If the receiver-drier outlet is colder than the inlet, this unit is restricted and should be changed to restore efficient and proper system operation.
The air delivery system controls the movement of heated and cooled air into and throughout the passenger compartment. The Hvac housing is the plenum unit located and beneath the instrument panel. It contains the evaporator, heater core, the blower motor assembly, blower speed control device and the vacuum controlled door actuators.
The plenum houses the air doors and door actuators that direct airflow to the correct ductwork. The doors may be controlled by cables, vacuum, or electrical actuators. Single zone systems are usually equipped with three doors.
AC vacuum-controlled door actuator main fault
Automotive ac climate control panel levers may operate a rotary switch to select the various vacuum or air routings to the motors that control A/C modes. The main fault experienced with vacuum-controlled door actuators is vacuum leaks.
Do you need assistance with the ac vacuum-controlled door in your vehicle?
We have auto ac mechanics in your area in Miami-Dade County. Some ac door actuators may be located underneath the dashboard of the vehicle and to get access to them could be labor intensive. Give Us a Call Today!