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 :
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.
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
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.
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.
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.
This is a list of the most common car a/c failures that lead to a no cooling ac condition in any vehicle:
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.
Call Today to set an appointment for a complete air conditioner system checkup in your vehicle. Early preventive service could save you a lot of money.
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. Depending on the a/c system design, the pressures will be impacted by the type of compressor, metering device(Expansion Valve or Orifice tube) ,ambient temperature and humidity. Pressure controlled systems could reach pressure cycling points faster ,increasing the compressor clutch cycling and forcing the compressor to operate under higher-than-normal crankcase temperatures if the system is undercharged. Short cycling compressors will decrease the life of the compressor clutch assembly, due to more often engagement and disengagement of the clutch assembly and the compressor pulley. When the system is overcharged the evaporator will not be able to evaporate the refrigerant metered by the metering device and liquid refrigerant could reach the a/c compressor. An overcharge system will force the a/c component working pressures to the limits and could develop leaks and cause compressor damage.
Improperly recharged car a/c systems will increase or decrease compression ratios, negatively impacting the overall health of the a/c system. Just because the air conditioner is blowing cold air, it doesn’t mean is working according to manufacturer specifications. Modern car a/c systems design have the capability to adjust their operation even when the freon recharge is not 100% accurate. The a/c system will change compressor displacement, thermal expansion valve operation ,condenser fan speed and will force the system to get to the desired temperature set by the driver. Car a/c systems working under inaccurate freon charge will have compression ratios that will stress the compressor and shorten their life. The manufacturer calculated values of superheat and subcooling happening in the evaporator coil and condenser coil will change, making it harder for the metering device to respond to the flow of refrigerant and for the compressor to receive refrigerant oil back from the evaporator needed for internal piston lubrication. Flash gas rates will be higher at the expansion valve making the valve less efficient.
You will need an AC freon recharge if the system is low or after any repair that involves opening the closed loop sealed air conditioning system is performed in your vehicle. A low freon charge could be the result of a leak in any component of the car ac system. 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 couple hours or days before it is low again. Refrigerant leak and refrigerant oil leak happen together ,just at different rates. Recharging the freon in the car ac system without balancing and recharging the oil will lead to compressor failure.
Our ASE certified air conditioning system specialist will take care of your vehicle’s air conditioning system. Have your system properly serviced by an air conditioning system specialist today! You can save money by servicing the a/c system following the manufacturer specifications. Call Today !
Auto A/C Compressors have evolved over time and the old, fixed displacement compressor has been replaced by more efficient variable displacement compressors. Pressure controlled variable displacement compressor and Electronically Controlled Variable Displacement Compressor (ECV) react in different ways compared to fixed displacement compressors when air conditioning restrictions and other common automotive a/c faults happen. Failure to identify the type of a/c compressor in the vehicle at the beginning of the diagnostic procedure could lead to unnecessary, expensive and in most cases time consuming repairs. A restricted Thermal Expansion Valve creates Manifold gauge readings that could lead to chasing a/c system leaks, unnecessary auto a/c compressor and sensor replacement.
Manifold Gauge readings
Low side LOW High side LOW
A restricted Thermal Expansion valve gauge readings will be different in the newer Pressure controlled variable displacement air conditioning compressor.
When a restriction in the refrigerant flow caused by a Thermal Expansion Valve (TXV) fault happens, the Pressure controlled variable displacement compressor will try to compensate the change in refrigerant pressure from the TXV by adjusting the compressor internal control valve, and keep the compressor crankcase pressure at a value where the swash plate angle based on the low side pressure is prevented from going into the condition where you see a manifold gauge vacuum reading. The manifold gauge reading in this type of system will show Low side gauge reading low and High side gauge reading low. It could be erroneously diagnosed as a weak compressor problem.
Low Side into Vacuum High Side LOW
A restricted Thermal Expansion Valve (TXV) gauge reading on an Electronically Controlled Variable Displacement Compressor will be different due to the logic the Powertrain Control Module uses to operate and control the a/c compressor. The PCM will receive inputs from the evaporator temperature and will command signals to the ac compressor electronic control valve to adjust pumping capacity accordingly. When the TXV fails or is restricted the evaporator temperature will increase and that increase value will be sent to the PCM which in turns will increase compressor pumping capacity to 100%.The Electronically Controlled Variable Displacement Compressor will operate similar to an old ,Fixed Displacement A/C Compressor and the Manifold Gauges will show Low Side going near 0 Psig or into a vacuum reading.
The air entering the cab is only slightly cool, and there are bubbles visible in the sight glass. there is usually about an 95% chance the restriction is expansion valve failed in the closed position related, 4% chance it is drier related and 1% chance it is somewhere else along the system or an internal drier desiccant bag rupture leading to a/c system contamination and restricting the metering orifice of the expansion valve.
Call Us today if your A/C is experiencing this symptoms! The correct diagnostic procedure will save you TIME and Money. Auto A/C Repair LLC. offers mobile a/c inspection in Hialeah,florida.
|Compressor Noisy||AC compressor internal noise||Bearing worn or damagedDefective cylinder/or shaft||Disassembly and replace defective parts.|
|Magnetic Clutch Noisy.||Rattling noise when magnetic clutch is not engaged .||Bearing worn or damaged.||Replace bearing.|
|Noise from piping||Piping not secured.||Piping vibrating .Pulsating noise resonates into body.||Secure piping.|
|Noise from condenser||Condenser vibration prominent.||Condenser mounting stay resonating with body .||Secure by inserting rubber between stay and body.|
|Noise produced by bracket.||Rattles when touched, continuous rattling heard when operating.||Bracket cracked or broken.Mounting bolts loose.||ReplaceRetighten bolts.|
|Idler pulley noisy.||Clattering noise produced. Rattles when touched.||Bearing broken.Bracket Cracked or loose.||ReplaceReplace or retighten.|
|Noisy crankshaft pulley.||Rattles.||Improperly installed.||Replace or retighten.|
|Belt Noisy||Belt deflection excessiveBelt side surface wornBelt worn||Belt wornBelt center misalignedWorn belt causing belt slipping on pulleys and tensioner||Adjust tensionAlign centerReplace belt|
|Noisy belt tensioner||Squealing belt and/or rumbling noise||Tensioner bearing or tensioner spring weak||Replace belt and tensioner|
Call today and schedule an appointment to have your auto a/c system inspected.
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.
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.
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.
If you need assistance Recharging the a/c system in your car Give Us a Call !
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