Restoring Comfort to Your Diesel Truck with RG Diesel LLC
If your diesel truck’s air conditioning system isn’t keeping you cool in the scorching weather, there’s no need to endure the discomfort. Come over to RG Diesel, LLC in East Tennessee, where we specialize in swiftly restoring your AC’s performance. Reach out to us now at 423-823-9987 or drop by our shop at 3460 W Andrew Johnson Hwy, Greeneville, TN.
Your diesel truck’s AC blows air only slightly cooler than the outside temperature.
Unpleasant mildew and mold odors emanate from your AC vents.
The AC functions only while the truck is in motion.
Even at the highest fan setting, there’s weak airflow.
Water condenses or drips onto your foot while driving.
Don’t delay! If your diesel truck’s AC isn’t operating at peak efficiency, a visit to RG Diesel, LLC is a wise move. Routine maintenance now can help you avoid more costly diesel AC repairs later. Sometimes, resolving a malfunctioning air conditioner is as simple and cost-effective as replenishing the refrigerant.
Sometimes, resolving a malfunctioning air conditioner is as simple and cost-effective as replenishing the coolant.
Most diesel truck air conditioning systems eventually require attention due to the extreme operating conditions of heavy-duty use. Hoses supplying the AC unit can crack, clog, or develop leaks if neglected. Let us service your diesel truck to keep your cooling system operating at its best. Dial 423-823-9987 to learn more about how we can restore your air conditioning.
At RG Diesel, LLC, we understand the unique and complex cooling needs of high-performance diesel trucks, including the Powerstroke, Cummins, and Duramax. We provide a full range of AC repair and maintenance services to ensure your comfort and the health of your system, focusing on reliable, high-quality workmanship in East Tennessee.
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Your diesel truck's AC system is a sealed unit, but over many years, refrigerant can slowly escape through microscopic gaps. Eventually, a truck will lose enough refrigerant so that its air conditioning system will no longer cool effectively. At RG Diesel, LLC, we are ready to recharge your AC to help you keep your truck’s cabin temperature cool.
"Help! My AC Only Blows Warm Air!"
New advancements in R134a refrigerant systems mean that leaks are far less common than with old R12 systems. Even newer model diesel trucks only leak a minimal amount of refrigerant per year. Come to RG Diesel, LLC when it’s time to recharge your AC refrigerant.
RG Diesel, LLC's Fast 3-Step Process:
Vacuum out all the old refrigerant before refilling it.
Add new R134a refrigerant.
Pressurize your diesel truck's AC system and test for micro-leaks.
"Does RG Diesel, LLC Have R12 Refrigerant For My Classic Diesel Truck?"
Unfortunately, R12 refrigerant is no longer available. If your diesel truck was made before 1994, you must convert your entire AC system to the new R134a standard. This conversion involves replacing dozens of seals and several AC components. R134a is a more highly pressurized and much more efficient refrigerant. Converting your R12 system to R134a is a significant job, so stop by RG Diesel, LLC today and talk with our mechanics about getting the job done right.
"Is Used Refrigerant OK?"
Many diesel repair shops resell used AC refrigerant. The old refrigerant is cleaned using a specialized recovery machine that removes contaminants. Used refrigerant provided by RG Diesel, LLC works just as well as new refrigerant after it's cleaned. Accepting used refrigerant is a great way to help minimize the environmental impact of refrigerants.
Refrigerant gas becomes a liquid when pressurized inside your diesel truck's A/C system but returns to its gaseous state as it leaks out. Many drivers in East Tennessee are completely unaware that they are losing refrigerant until the day they turn on the AC and find only warm air blows out.
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We recommend that diesel truck owners replace the complete AC compressor assembly because the replacement core operates under extreme physical pressure. The compressor is powered by a serpentine belt, which provides the energy needed to compress refrigerant. Once compressed, the high pressure forces the liquid out of the compressor and through the cooling system.
What To Expect When RG Diesel, LLC Replaces Your AC Compressor
- Durability-Tested: We use AC compressors that are durability-tested for the high heat conditions found in diesel engine compartments.
- OE Function: We use a replacement kit assembly designed to meet or exceed Original Equipment (OE) function. It includes the AC compressor, accumulator, and any needed expansion devices.
- Rapid Seal: We use kits with a "Rapid Seal" designed specifically for your compressor. RG Diesel, LLC's pro mechanics know that even the smallest gaps can cause serious damage to your diesel cooling system.
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If your AC fails, it may be your condenser. The condenser looks like a large black square and is usually mounted in front of the radiator. Like radiators and evaporators, condensers are constructed as a series of tubes with fins around them. The condenser's job is to release the heat your refrigerant absorbed while it was flowing through the evaporator, much the same way the radiator releases heat from engine coolant.
Depend on RG Diesel, LLC to Replace Your Diesel AC Condenser
- System-Specific Parts: We use parts specifically for your diesel truck's original air conditioning system.
- Calibration: We calibrate performance multi-flow systems and ensure proper subcooling.
- Inspection: We inspect the heat exchanger core designed to shed airborne material buildup.
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Trust RG Diesel, LLC To Replace Your Diesel Evaporator
- Full Seal Testing: Get AC unit full seal testing.
- Corrosion Repair: Identify and repair internal corrosion issues.
- Leak Detection: Find troublesome micro cracks and leaks in the evaporator core.
- System Calibration: Pressurize and calibrate the AC system to manufacturer standards for your specific diesel truck.
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Your diesel vehicle's AC system is under extreme pressure, and the thermal expansion valve or orifice tube monitors the amount of pressure and the temperature of your A/C system. It calculates the precise amount of refrigerant that can safely go into the evaporator. A failing expansion valve or orifice tube often causes a diesel vehicle's air conditioner to blow hot air.
Replace or Repair
- Expansion Valves (TXV): Too much refrigerant causes your evaporator to get too cold, whereas too little refrigerant would result in inadequate cooling. The expansion valve is a complex valve that regulates refrigerant flow. This process of metering the refrigerant adjusts the flow according to the temperature of the refrigerant in the evaporator coil. Talk to one of the pro mechanics at RG Diesel LLC, as this part can be replaced on its own and does not require the entire replacement of the AC assembly.
- Orifice Tubes: Unlike the expansion valve, the orifice tube is a simple fixed device with no moving parts. It therefore cannot vary the flow of refrigerant into the evaporator, but rather causes a permanent restriction in the system. However, like the expansion valve, the orifice tube regulates refrigerant flow through the system and filters debris which may come through in its screen. Often, fixing a "bad orifice tube" requires replacing the entire evaporator assembly in the diesel vehicle.
How often should refrigerant be changed?
Never, at least not in the way you think of your oil being changed. Your diesel truck's AC system is a sealed unit. No new refrigerant needs to be added unless there is a leak. Over time, as your diesel truck ages, small cracks may form in your AC system parts such as the compressor, condenser, evaporator, receiver-dryer, expansion tube, and connecting hoses, allowing refrigerant to escape. If this occurs, you need to replace the failing part and have your refrigerant recharged. At RG Diesel, LLC, we diagnose the leak and replace the faulty component to ensure a lasting repair.
How Long How long should a refrigerant recharge last?a Refrigerant Recharge Last?
If your diesel truck's AC system was recently repaired and required a refrigerant recharge, it should not need to be replaced again. Your AC system is a closed or sealed system that does not allow refrigerant to escape. Refrigerant is not like gasoline; it does not get depleted. If refrigerant is escaping after your diesel truck's AC system has been repaired, then additional work may need to be done to find the leak. The expert mechanics at RG Diesel, LLC specialize in leak detection to ensure the problem is fixed completely, providing you with long-lasting cold air.
How much refrigerant does my diesel truck need?
Do not guesstimate your diesel truck’s refrigerant needs! Most diesel trucks use between 28–32 ounces (the equivalent of 2–3 12oz cans), but larger diesel trucks and those equipped with rear A/C systems can be different. Always check your truck's service manual or the label located under the hood for the exact specification to avoid overfilling the system. At RG Diesel, LLC, we ensure precise charging based on manufacturer specifications for your specific diesel model.
Should my diesel engine be running when adding refrigerant?
It is advised to have your diesel engine running while recharging your diesel truck's A/C system. This is essential because the A/C compressor, powered by the engine, must be active to facilitate proper refrigerant circulation and ensure an effective recharge.
Why is my diesel truck blowing hot air after adding refrigerant?
If your diesel truck is still blowing hot air immediately after adding refrigerant (often called Freon), the primary reason is an unaddressed refrigerant leak. A refrigerant leak can lead to a loss of pressure in the AC system, which prevents the system from properly cycling the refrigerant to produce cold air. This is why a recharge may prove ineffective; the new refrigerant escapes quickly through the same failure point. It is crucial to inspect the system for leaks and repair any issues (such as replacing a cracked hose or worn seal) before proceeding with a recharge. Simply adding refrigerant to a leaky system is an ineffective, temporary fix.
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