Frequently Asked Questions

10 most frequently asked questions.

  1. Why is my vehicle’s A/C blowing warm air?
  2. What refrigerant gas do I have in my A/C system?
  3. How do I find the low-side port?
  4. What should my vent temperature be?
  5. How can I eliminate a bad smell coming from the vents?
  6. Can I recharge the system myself?
  7. Why do I need to wear gloves when adding refrigerant?
  8. I keep having to add refrigerants. Where did it go?
  9. What happens if my A/C System is overcharged? Is an overcharged system dangerous?
  10. How do I top up my A/C system using STP® Auto Freeze and STP® EZ Chill Air-Con Recharge?

  • Why is my vehicle’s A/C blowing warm air?

    It could be many reasons, but one of the most common reasons is a low refrigerant charge caused by a leak in the system. Taking the low-side pressure reading is the only way to tell if the system is blowing warmer air due to missing refrigerant. Therefore, it is important to check the A/C system pressure BEFORE you add additional gas into a system.

  • What refrigerant gas do I have in my A/C system?

    The refrigerant gas used in a vehicle’s A/C system is dependent on the model of the car and/or the manufacture year. To check which refrigerant gas your vehicle uses, locate the manufactures identification sticker under your bonnet.

  • How do I find the low-side port?

    To find the low-side port, first locate the A/C compressor. Two metal tubes come out of the compressor. The smaller tube is a high pressure line that runs to the front towards the radiator. The larger diameter tube which runs back towards the passenger compartment is the low pressure line. Follow this until you find the port. Some service port caps are marked with a “L” and “H” to distinguish between the high and low ports.

  • What should my vent temperature be?

    Readings between 45°-60°F indicate a properly charged system.

  • How can I eliminate a bad smell coming from the vents?

    STP® Air-Con Cleaner cleans and deodorizes automotive air conditioning systems, including the vents, ducts, evaporator core, and drain pan. It effectively eliminates odours caused by microbes while providing a clean, fresh scent.

  • Can I recharge the system myself?

    YES! The STP® Air-Con range allows you to properly maintain and service A/C systems without the need for expensive equipment and training. This 10- minute A/C recharge job is as simple as the rest of your car maintenance: checking oil, tyre pressures and topping up screen wash.

  • Why do I need to wear gloves when adding refrigerant?

    You need to wear gloves for a couple of reasons:

    1) As you release refrigerant from the can into your vehicle's A/C system, the can will become very cold to the touch

    2) You are working around a running vehicle. There will be hot surfaces that could possibly burn you.
    In order to protect your hands from the cold can and possible burns, always wear cloth-lined gloves as well as safety eyewear.

  • I keep having to add refrigerants. Where did it go?

    Refrigerant does not break down, expire or get used up. If the A/C system is low on refrigerant, it’s because there is a leak!

    If your car is more than five years old, then chances are that the O-rings and gaskets have become brittle and inelastic causing small leaks throughout the system. STP® Auto Freeze, EZ Chill or Advanced R-1234yf Auto Air Con Recharge can help top up lost refrigerant and restore cold air. Check which refrigerant gas your vehicle uses by locating the manufactures identification sticker under your bonnet.

  • What happens if my A/C System is overcharged? Is an overcharged system dangerous?

    Yes, not only is overcharging your system potentially dangerous, an overcharged system will not function properly and can seriously damage your A/C compressor or other components.
    The symptom of an overcharged A/C system is exactly the same as a system that is undercharged: warm air coming out of the vents.
    In order to prevent overcharging, it is important that you measure the A/C system pressure before charging and follow the respective instructions as per the reading.
    If your A/C system is overcharged, seek professional assistance to have the excess refrigerant recovered from the A/C System.

  • How do I top up my A/C system using STP® Auto Freeze and STP® EZ Chill Air-Con Recharge?

    1.FIND PORT
    •Do not start the engine.
    Always connect and disconnect with engine off.
    •Locate the A/C low side service port.
    •Wearing googles and gloves, unscrew the dust cap and attach the STP® Reusable Trigger & Gauge by pressing down the coupler on the low side port. The coupler will only fit on the low-side port - do not force.
    •If reading is zero, this indicates there may be an abnormal leak in the system. Do not attempt to add refrigerant. Seek professional advice from a mechanic.




    2. MEASURE
    •Start the engine
    •Set A/C to maximum cooling and activate recirculation mode.
    •Check that the A/C compressor is running, listen and watch the clutch engaging. Allow for the engine to run 2 minutes.
    •Without pressing the trigger, check the gauge reading and compare to the chart below. If the PSI reading is in the white sector (5-25psi), charge the A/C system following instructions in step 3.


    3.CHARGE
    •Remove coupler from port with engine switched off.
    •Screw the canister of STP® EZ Chill or STP® Auto Freeze Air-Con Recharge into the trigger dispenser ??" do not overtighten.
    •Reconnect the coupler to the low side port and restart the engine.
    •Shake the canister and squeeze the trigger while rotating the can from the 12 to 3 o’clock position to disperse the can contents.
    •Check the pressure every 30 seconds by releasing the trigger. Continue the process, frequently releasing the trigger to check system pressure until gauge reads ‘filled’ (needle is in green zone).
    BE CAREFUL NOT TO OVERCHARGE YOUR SYTEM. Do not let the needle past the green zone.
    •Once completed, pull the coupler up and replace cap on the low service port.

    4.STORAGE
    •Once the trigger is connected to a canister, do not remove until can is completely empty.
    •Canisters contain gas under pressure which may explode if heated. Store in well ventilated place and protect from sunlight.

    IMPORTANT: ALWAYS WEAR GLOVES AND SAFETY GOGGLES




Video Tutorials
Charge Port Locator

Find out how to recharge your air conditioning by choosing the make and model of your car.

NOT SUITABLE FOR
HYBRID VEHICLES