Car Air Conditioning FAQS
LMR Earlwood are well placed to take care of all of your Car Air Conditioner Re-gas, Repair, Servicing and Inspection needs
You should bring your vehicle to a reputable workshop such as LMR Earlwood regularly to make sure the air conditioning system continues performing at its best as well as having the mechanics evaluate the condition of the whole vehicle.
Repco Authorised Service mechanics perform a 65 point Vehicle Inspection with every service and can give you a heads up about any components that may need to be renewed in the near future or those that are already damaged beyond repair.
LMR Earlwood can arrange automotive air conditioning service with a licenced technician in and around Earlwood and the surrounding areas.
Air Conditioning FAQ's
How does Car air conditioning get rid of heat from a vehicle?
A car air conditioning system is composed of four basic parts - a compressor (Pump driven by the engine,) which compresses and circulates refrigerant gas, the condenser to dissipate heat and condense gas to a liquid, an expansion device, known as a thermal expansion valve (TXV) or an orifice tube (subject to the type of air-con system used). Systems using orifice tubes also have an accumulator before the compressor to remove moisture from the refrigerant while TXV systems have a receiver-dryer before the evaporator to perform the same crucial task. Both the accumulator and receiver-drier are also used to store refrigerant.
An automotive air conditioning system is designed to withdraw heat from the air in the interior of the car and transfer it to the exterior, leaving only cooled or 'conditioned' air behind to be recirculated. Hot air is passed across a gas filled evaporator, where the heat is easily absorbed by the refrigerant (in gas form), effectively removing the heat from the air in the car.
The now heated gas is pulled through the compressor where it is further heated (via compression). The next stage involves the refrigerant being forced through the condenser to quickly extract the heat from the refrigerant. The refrigerant, now condensed to a liquid, then moves through the expansion device (either a TXV or Orifice tube), which regulates the flow of refrigerant going to the evaporator, changing the high-pressure liquid to a low-pressure mist (gas). A fan blowing over the cold fins of the evaporator produces the cold air being blown into the car and the entire process then begins all over again.
What does a car air conditioning service involve?
A typical air conditioner service may include some of the following items;
Check air vent temperature is correct
- Test condenser temperature
- Inspect suction line temperature
- Corrections of pulley and drive belt
- Validate correct operation of valves and thermostats
- Cleaning of the condenser fins
- Confirm adequate condition of components and hoses
- Evacuation and recharge of refrigerant (where required)
- test system lines and components for leaks
Why do I need a car air conditioner system service?
The compressor needs the right amount of oil in the refrigerant to prevent it from seizing up. Should the air filters become clogged with dirt and bacteria it will affect the performance of the entire system and it can even cause it to cease to work altogether. Aside from degrading air conditioner performance, dirty air filters can cause all kinds of health problems too.
Your air conditioner ought to be inspected annually for any signs of problems with the connections, seals and hoses to ensure refrigerant levels are being maintained over time. Regular service of your car air conditioner keeps refrigerant at optimum levels meaning the system does not need to work as hard and this in turn protects the system from damage and results in a reduction of fuel consumption.
Why does the car air conditioner need to be serviced?
An automotive air conditioning system is designed to withdraw heat from the air in the interior of the car to the exterior, leaving only cooled or 'conditioned' air behind to be recirculated. This is achieved using a special compound called refrigerant, capable of readily absorbing heat as a gas and quickly losing heat as a liquid.
Being exposed to the elements and very harsh operating temperatures and being expected to function intermittently rather than being 'Always On' can cause problems on the seals, hoses and connections. An air conditioner should be examined on a regular basis to ensure there are no problems or refrigerant loss due to failure or leakage from these points.
Simply by cooling the air in your car under normal running conditions, the filters of the air con get dirty and intermittent use can cause seals to dry and crack, allowing them to leak. Even without leaks, the gas in a car air conditioning system will eventually begin to degrade or evaporate over time and should be recharged where required to keep the air con system in peak running condition.
Can I service my own Air Conditioner?
Only qualified mechanics with the appropriate training should attempt to service a car air conditioner. Specific licences are required to be able to service or repair some types of car air conditioning systems, especially where regas (recharging of the refrigerant) is concerned. Strict guidelines and procedures must be adhered to when handling certain refrigerants, which must always be fully recovered and not allowed to escape into the atmosphere during servicing.
Refrigerant can also pose serious health risks if handled incorrectly. Specialist equipment is also required as the air conditioning system is under extreme pressure and must be pulled into a deep vacuum to remove any moisture, to avoid seriously damaging the system.
LMR Earlwood can arrange Air Conditioning Service with a Licenced Technician. You can find out more about licensing on the Australian Refrigeration Council (ARC) Website.
What is making the bad smell in car air conditioning?
The evaporator core can be the perfect breeding ground for microbes, bacteria and even fungus due to the damp conditions found there. This can lead to nasty smells and possibly even be bad for the health of any vehicle occupants. Modern evaporator units tend to be more efficient, but more fins equals increased capability to trap moisture and allow for micro-organism development.
LMR Earlwood mechanics can use specialist ultrasonic technology to destroy any micro-organisms that may cause bad odours or health concerns.
Just ask about our MIST service, which will kill any bacteria that may be lurking in your car’s air system. These bacteria can cause odours and even make you sick, especially if you have allergies or asthma. A MIST service doesn’t just make your car smell better - it makes it healthier for you and your family.