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How To Add Refrigerant To A Subaru Impreza AC System
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6 DIY Car AC Recharge Pitfalls | Hanson Subaru of Olympia
While a can of AC recharge from your local auto parts store can be an easy fix, Hanson Subaru proves 6 potential pitfalls from these DIY products.
Source: www.hansonsubaru.com
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Subaru Impreza low AC refrigerant symptoms, how to recharge
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Charge Subaru Air Conditioner with Freon – YOUCANIC
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DIY : AC Recharge
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6 DIY Car AC Recharge Pitfalls
5. Correct connection
It’s important that you not only know where to connect the leads for proper car AC charging, but also that the connectors match. Older vehicles used a different type of refrigerant and the fittings for these older AC lines will not work with modern AC charging systems.
4. Retrofit old vehicle
Chances are your vehicle uses air conditioning refrigerant called R-134A. Every vehicle made with AC power since 1994 uses this type. Until then, R12 was the usual refrigerant used. This means you need to take a few extra steps to properly charge a vehicle AC system for your classic ride. These two refrigerants don’t mix, so you need to evacuate the entire system, change connections, and ensure the integrity of the entire system. If this is the case, the work must be carried out by a licensed professional with equipment to recover the old refrigerant.
Subaru Impreza low AC refrigerant symptoms, how to recharge
Refrigerant is the magical compound that flows through the Subaru Impreza’s air conditioning system, allowing super-cooled air to be blown into the blistering heat. What happens if the refrigerant level gets too low?
Subaru Impreza – (Tomas Devera Photo / Shutterstock)
The single most noticeable symptom of low A/C refrigerant in Subaru Impreza is warm air coming out of the A/C vents. Insufficient amount of refrigerant in the air conditioner is one of the main causes of the air conditioner not cooling properly. This can happen due to a leak or if the air conditioner has not been charged for a long time.
refrigerant leak
A low refrigerant level in your Impreza does not necessarily mean there is a leak. Ideally, the refrigerant in a properly sealed air conditioning system should never leak, but most automotive air conditioning systems lose a small amount of refrigerant over time due to minor defects and will need topping up every few years.
If you don’t maintain the air conditioning system in your Impreza for a long time, the refrigerant level will eventually become so low that the system loses its cooling capacity. Simply have it refilled and you can drive at pleasant temperatures again. If the refrigerant level drops again quickly, there is probably a leak.
Causes of refrigerant leaks
A refrigerant leak in the Impreza can be caused by leaking o-ring seals, a leaking condenser or evaporator core, or a ruptured hose. The leak can be diagnosed by injecting a small amount of fluorescent dye into the AC system. If the refrigerant leaks again, the leaking component will glow under UV light.
Since the capacitor is located at the front of the vehicle, it can be damaged even in minor accidents such as being run over by a branch in a storm. If your vehicle has been in an accident, you should inspect the condenser and its hoses for leaks.
This is how you easily top up air conditioning refrigerant
There are two connections in the Impreza air conditioner. One is marked H for high pressure and the other L for low pressure. You can charge your AC via the low-pressure port with a do-it-yourself AC charging kit.
Open the hood of your Impreza. Check what type of refrigerant your vehicle uses. This information is usually found under the hood and/or in the owner’s manual. Start the engine. Turn on the air conditioner and set it to the coldest setting and the fan speed to maximum. Remove the cap from the low pressure service port labeled L and connect the AC charging kit.
Note: If the connectors are not labeled, try connecting the charging kit to both unlabeled connectors on the AC hoses. The refill kit only connects properly to the low-pressure port and does not fit the high-pressure port. Briefly shake the canister and release the refrigerant into the system until the recommended pressure is reached.
Note: See next section for recommended pressures.
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Warning: Wear gloves and safety glasses before recharging the air conditioner to avoid accidental contact with harmful chemicals in the refrigerant. It is also cryogenic and can cause severe frostbite on skin contact.
Overcharged refrigerant
Just as with low refrigerant, the Impreza’s air conditioning only blows warm air when the air conditioning system is overcharged with refrigerant. An overloaded system not only affects cooling performance, but can also damage the compressor and sometimes cause a larger leak.
The ambient temperature affects the refrigerant pressure
The refrigerant pressure is influenced by the outside atmospheric temperature. So even if you have charged your Impreza AC to the recommended pressure, the system could still build up too much pressure as the ambient temperature gets warmer.
Most modern vehicles use R-134a refrigerant, but newer vehicles are increasingly using R-1234yf as a greener substitute. The pressure values based on ambient temperatures differ depending on the type of refrigerant. Consult your vehicle’s owner’s manual or look under the hood to find the type of refrigerant your vehicle uses.
Low pressure values R134a vs. R1234yf
Ambient temperature R-134a R-1234yf 70°F (21°C) 35-40 psi 20-30 psi 80°F (27°C) 40-50 psi 25-35 psi 90°F (32°C) 45-55 psi 30-40 psi 100°F (38°C) 45-55 psi 35-45 psi 110°F (43°C) 45-55 psi 40-50 psi
Check refrigerant pressure
Connect the pressure gauge to the low pressure port (L) in the Impreza. If the pressure is higher than the recommended values, preferably discharge some refrigerant into an empty tank as releasing the refrigerant into the air is harmful to the environment and against the law.
The right way
The DIY AC charging kit method is considered a quick fix and is not usually recommended by the professionals. The correct way is to completely evacuate the refrigerant from the air conditioning system using a recovery machine, and then refill the exact amount of refrigerant by weight based on the manufacturer’s specifications.
The pressure gauge set is used by professional air conditioning mechanics for evacuating and refilling refrigerant.
Conclusion
There are many reasons why your Subaru Impreza AC is blowing warm air. When looking for the cause, you should always start with the most obvious cause, which is insufficient refrigerant charge.
In any case, a visit to a workshop is advisable for laypeople. A professional mechanic can quickly diagnose the problem of poor air conditioning cooling for you.
Charge Subaru Air Conditioner with Freon
This guide provides instructions on how to charge the Subaru Air Conditioning (AC) system using an AC charging kit. The instructions in this manual apply to many Subaru models including Forester, Outback, Impreza, Legacy, WRX,
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