Convenient & Local 2014 Nissan Sentra A/C Repair
A/C Service for Nissan Sentra
Few things are worse than a broken car air conditioner on a hot summer day. Your steering wheel feels like lava. Your skin sticks to the driver’s seat. “Who can fix my Nissan Sentra A/C?” you wonder, as the sun beats through the windshield. Firestone Complete Auto Care — that’s who! We know our way around Nissan vehicles, and our qualified technicians can diagnose and service the A/C system in your 2014 Nissan. Steer your Nissan Sentra to your nearest Firestone Complete Auto Care
During this initial A/C performance check, we’ll look at the state of your 2014 Nissan Sentra’s A/C system to determine whether repair work is needed. We’ll test overall system performance, check for any leaks, and measure the system pressure. If we suspect a leak, we’ll send a U/V dye through your A/C system or use a “sniffer” to find the leak. What’s a “sniffer,” you ask? It’s a specially designed machine that’s used on parts of your Nissan Sentra A/C system to detect refrigerant fumes escaping from the system. If your A/C system has a leak, we’ll find and repair it.
A/C Recharge for Nissan Sentra
While your 2014 Nissan Sentra’s air conditioner is being serviced, we’ll also do an A/C evacuation and recharge. To do this, one of our technicians will remove the refrigerant in your A/C system (if there is even any left to remove). Then, they’ll use Nissan’s specifications to evacuate the system. To finish, we’ll add new refrigerant to recharge the A/C system, and after one final test to be sure the system is cooling properly, you're ready to get back on the road. Our technicians are trained to efficiently perform 2014 Nissan Sentra A/C recharges.
Troubleshooting Nissan Sentra A/C Problems
Warm air isn't the only Nissan Sentra A/C problem you may encounter. Typical A/C problems also include weak airflow, which could mean you have a compromised seal, mildew or mold buildup, a loose or damaged hose, or a ventilation fan that needs to be replaced. If your A/C system blows cold air first but then it turns warm, this may suggest a leak, a blown fuse, or a damaged compressor clutch. What about those (somewhat unpleasant!) smells coming through the A/C vents in your 2014 Nissan Sentra? You could have a moldy evaporator case, or you may simply need a new cabin air filter installed. Our trained technicians will do what they can to solve your A/C problems. Don’t sweat it — we’re here to help you chill out again in your Sentra.
Frequently Asked Questions for 2014 Nissan Sentra A/C Systems
Can I make my Sentra air conditioner colder? Here are a few quick ideas. Shut the passenger air vents and point the other vents directly toward you. Park your car in the shade and use a window sun blocker. Then visit Firestone Complete Auto Care for an A/C performance check and recharge.
What’s making my Sentra A/C put out warm air? If your car’s air conditioning isn’t blowing cold air at all (or it tries, then turns warm), you could have a clogged expansion valve, a faulty compressor clutch, a leak, or a malfunctioning fuse in the system.
What can cause an A/C system leak? A/C system leaks are often due to a combination of age and moisture. Rubber seals and gaskets naturally degrade over time, allowing refrigerant to exit and moisture to enter your Sentra's A/C system.
Introduction: How to Recharge Your Car's Air Conditioner
Is the air coming from the vents in your car just not as cold as it used to be? You've likely run low on refrigerant in your A/C system.
Over time, tiny amounts of refrigerant leak from the lines, degrading A/C performance. The solution is simple - put more back in.
Recharging your air conditioner yourself is inexpensive and can be completed in just a few minutes. This is one of the most quick and easy tasks to perform when maintaining a vehicle, but holds the potential to cause problems with the air conditioning system if done incorrectly, so read each step very carefully before proceeding. When finished, your air conditioner should make icy cold air, and the whole process should only set you back about 25-35 dollars and 15 minutes of your time.
This guide will contain information on how to recharge your air conditioner with refrigerant 134a or r-134a.
How Air Conditioners Work:
An air conditioner has three main parts. A condenser, a compressor, and an evaporator. The condenser and evaporator are, more or less, two radiators connected in a loop. The compressor is situated between them on one side of the loop. The system is sealed from the outside, and filled with a working fluid, in this case r-134a. The compressor takes low pressure, gaseous, r-134a, compresses it (which creates heat), then sends it to the condenser, where the heat is dissipated to the outside. After the condenser, liquid refrigerant travels to the evaporator, located inside the passenger compartment, where it is allowed to expand, removing heat and cooling the evaporator. The fan directs air over the evaporator, then out the air vents in your car.
Because the working fluid gets both very hot and very cold, it is important to keep moisture out of the system, as ice forming in the compressor can damage it.
As always, neither Instructables nor myself are responsible for any damage you may cause to yourself, your vehicle, or others.
Step 1: What You Will Need and What You Should Know
First, was your car made before 1994? If so, your car likely uses R-12, and this guide isn't for you. However, if you search the engine bay and find a sticker stating that the system has been converted for use with r-134a, continue.
WHAT YOU'LL NEED:
- Two 12oz. cans of r-134a refrigerant ($9.99/ea)
- One refrigerant dispenser ($16.00)
- One pair of goggles
Purchase the plain r-134a refrigerant from the bottom shelf. Don't be fooled by the shiny cans that have leak sealants and performance enhancers. These are just "snake oil" and can actually harm your A/C system.
Your dispenser needs to have both a pressure gauge and a trigger. These are not optional, and are required to do this safely and correctly. DO NOT purchase the dispenser/refrigerant combos.
Note: I do not endorse idQ, EZChill, or SpeedSteed in any way. These are the parts that I happened to choose, and I am sure their competitor's products are just as good.
Step 2: Assemble the Dispenser
I would recommend putting on your goggles now.
Insert a can of refrigerant into bottom of the dispenser, and screw in all the way.
Note: There is a needle inside the dispenser that pierces the can automatically.
Step 3: Verify That the Compressor Is Running
1. Start the engine
2. Turn the A/C on
3. Turn the fan to maximum
4. Follow the hose from the low side fill port to a cylindrical device attached to the engine - this is the compressor
5. Locate the pulley on the compressor.
6. Is the center part of the pulley spinning?
Yes. Then the compressor is engaged, as it should be.
No. Add half of a can of r-134a as detailed in the manner described in the upcoming steps. If the compressor still fails to engage, take your vehicle to a mechanic.
7. Leave the engine running and the A/C on maximum until you are finished with the entire filling process.
The photos depict the compressor in its engaged and disengaged states.
Step 4: Locate the Low Pressure Side Refrigerant Fill Port
1. Pop the hood.
2. Locate the refrigerant fill port on the low pressure side of the system. This will have a small plastic lid with an L printed on the top. Unscrew this cap to reveal the port.
Where is the fill port?
For most vehicles, the low pressure side fill port is located on the left side of the engine bay. It will often be a small section of metal pipe that has two lengths of rubber hose coming off either end. Look to the back of the engine bay called the firewall. Protruding from the firewall should be two pipes or hoses next to one another, one larger than the other. Follow the larger hose to find the low pressure side fill port. The photos depict the location of the fill port on two different late model engines.
DANGER! Do not touch anything you are unfamiliar with. Almost everything in the engine bay moves and/or gets hot. The high pressure side (small) hoses get very hot, do not touch them. It is okay to touch the low pressure side hoses, they should be around ambient temperature.
Step 5: Attatch the Dispenser
Read and understand the following directions thoroughly. You will want to do steps 4-6 rather quickly.
1. Grasp the connector on the end of the hose thusly.
2. Lift the outer sleeve of the connector.
3. Squeeze the trigger for 2 seconds to purge the hose of any air.
4. While still squeezing the trigger and lifting the sleeve, press the connector firmly onto the fill port.
5. Release the outer sleeve of the connector, then the connector itself. It should snap into place on the fill port.
6. Release the trigger.
7. Gently tug on the connector to ensure it is properly seated on the fill port.
Squeezing the trigger keeps a constant flow of refrigerant coming out of the hose, purging it of any outside air and moisture, keeping them out of your air conditioning system.
Step 6: Recharge the System
Determine the correct pressure to fill to.
Consult the table provided with your dispenser to determine the minimum and maximum acceptable pressure readings for the current outside air temperature. This is your target pressure range. Some gauges have an adjustable "V' on them to highlight the acceptable pressure range. Set yours to the appropriate position now.
Take a pressure reading.
If the needle on the dispenser reads below the minimum acceptable pressure, begin filling the system.
To fill the system with refrigerant:
1. Squeeze the trigger for 5-10 seconds, slowly tipping and shaking the can. NEVER TURN THE CAN UPSIDE DOWN.
2. Wait 30 seconds for the pressure to equalize.
3. Read the pressure displayed on the gauge again. Only measure pressure while the compressor is engaged. If the pressure is still too low, keep adding refrigerant in the manner described above.
4. When the pressure is correct, stop filing the system and wait a few minutes.
5. Check the pressure one last time before removing the dispenser hose and replacing the protective cover on the fill port.
BE VERY CAREFUL NOT TO ADD TOO MUCH!
If you believe you have added too much refrigerant, consult the troubleshooting guide on the last step.
How do I tell when the can is empty?
This sounds too simple, but, it will feel empty. Shake the can or strike it with your fingernail. If it feels like it's empty, it is.
How do I change cans?
When the can is empty:
1. Turn the can upside down.
2. Hold the trigger on the dispenser for 30 seconds to 1 minute.
3. Release the trigger.
4. Unscrew the can from the dispenser, and screw a new one back on.
NOTE: You should leave the dispenser connected to the fill port while emptying the can, unless you are finished with the filling process.
DO NOT EMPTY THE LEFTOVER REFRIGERANT INTO THE AIR.Leave the unused portion in the can attached to the dispenser, and store where it will not be exposed to heat.
It is illegal under Section 608 of the Clean Air Act to knowingly vent refrigerants during any service, maintenance, repair or disposal of an appliance.
Step 7: Voila! You're Done.
If everything went as planned, your car's air conditioning should be ice cold! Enjoy.
If not, let's try to figure out where things went wrong:
The needle isn't moving/I don't think any refrigerant is going into the system.
Be patient. It takes a fair amount of refrigerant to raise the pressure. If you still have issues, check to be sure that you connected the dispenser to the fill port properly.
Help! I think I put in too much refrigerant.
Double check that the condenser hasn't disengaged. The pressure can spike quite a bit when the condenser disengages. If the pressure is still too high, I cannot recommend that you attach the dispenser to the fill port without a can and squeeze the trigger to release the excess refrigerant, because that is illegal. You must take your vehicle to a mechanic.
The compressor won't engage!
If your compressor will not engage, add half a can of freon. If it still will not turn, it is likely broken. Do not add more refrigerant! You will need a mechanic to repair this problem.
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Car AC Repair Service
How much does a Car AC Repair cost?
On average, the cost for a Nissan Sentra Car AC Repair is $245 with $112 for parts and $133 for labor. Prices may vary depending on your location.
|2002 Nissan SentraL4-2.5L||Service typeCar AC Repair||Estimate$385.77||Shop/Dealer Price$455.96 - $635.05|
|2006 Nissan SentraL4-2.5L||Service typeCar AC Repair||Estimate$357.77||Shop/Dealer Price$427.99 - $607.09|
|1998 Nissan SentraL4-1.6L||Service typeCar AC Repair||Estimate$357.77||Shop/Dealer Price$427.99 - $607.09|
|2004 Nissan SentraL4-2.5L||Service typeCar AC Repair||Estimate$357.77||Shop/Dealer Price$427.95 - $607.03|
|2000 Nissan SentraL4-2.0L||Service typeCar AC Repair||Estimate$357.77||Shop/Dealer Price$428.01 - $607.13|
|2003 Nissan SentraL4-1.8L||Service typeCar AC Repair||Estimate$357.77||Shop/Dealer Price$427.99 - $607.09|
|2007 Nissan SentraL4-2.0L||Service typeCar AC Repair||Estimate$371.33||Shop/Dealer Price$443.00 - $626.88|
|2000 Nissan SentraL4-1.8L||Service typeCar AC Repair||Estimate$364.77||Shop/Dealer Price$435.32 - $614.67|
Show example Nissan Sentra Car AC Repair prices
What to Expect:
For an AC system to work, it needs a gas or liquid substance called refrigerant (R-12 in older cars, R-134a in 1995 and newer cars). Over time, refrigerant can leak from the AC system through seals. If the AC does not have enough refrigerant, it will not blow cold air.
Keep in mind:
Since the AC system is a sealed unit, the only way to tell if the car needs a recharge is if the AC is not blowing cold air through the vents. There are two types of refrigerant. These cannot be interchanged. For older cars, it should be filled with R12 refrigerant or converted to a newer system. For cars made after 1995, the AC should be filled with R134a.
How it's done:
- Install air conditioning manifold gauge set.
- Determine if the air conditioning system charge is low.
- Add the correct refrigerant to top off the air conditioning system.
- Install thermometer in vents to monitor vent temperatures.
- Check system for leaks.
- Check for proper operation of AC system.
It is common for refrigerant to leak. If the AC is not as cold as you expect, then it is probably a good time to have the mechanic look at it. Lack of proper cold air can be an indication of other problems with AC (fan not working, AC compressor not working, etc.).
What are the common symptoms indicating you need an Car AC Repair?
- AC is not working.
- AC is not blowing cold air.
- Clicking noise from the engine compartment.
How important is this service?
In addition to your comfort, air conditioning systems add value to your vehicle. You should keep your AC fully operational. In some systems, the hot and cold air are blended to achieve the desired temperature setting. In these cases, when the AC system fails, in addition to not getting any cold air, the entire temperature regulation can be thrown off.
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4 Reasons Your Car A/C May Be Blowing Hot Air
You finally made it through winter! Summer is around the corner and it’s the best season for driving. Even your daily commute is a little bit better when it’s warm and sunny.
But nothing can spoil summer fun quite like a broken car air conditioner. The A/C is one of the most complex systems in your vehicle. If it is blowing warm air, there could be several causes. We'll explain a few of the most common ones.
1. Refrigerant Leak
A car A/C blowing hot air is often the result of a refrigerant leak. Refrigerant is a liquid that circulates through your car's A/C system, expanding and contracting as it removes heat and humidity from the cabin. None of the other A/C components will function correctly without proper refrigerant levels.
A leak can happen because of an old hose as well as a rusted or punctured evaporator. But don't expect to easily spot a refrigerant leak. You probably won't notice a puddle of liquid in or under your car. That's because unlike motor oil and other vital car fluids, antifreeze evaporates when exposed to the atmosphere. Sometimes, you'll get lucky and notice an oily residue at the exact location of the leak.
To definitively identify a refrigerant leak, one of our expert technicians needs to inject dye into the system to trace it. Once they identify the source of the leak, they repair and recharge your car A/C so it can blow fresh, cold air once again.
2. Faulty Condenser
When your A/C system pulls the heat and humidity out of your cabin, the refrigerant absorbs them. In turn, the condenser's function is to keep the refrigerant cool so the cycle can continue. If the condenser isn't doing its job, the process breaks down. That's when you get slapped in the face by a blast of hot air.
The condenser is at the front of the car, between the grate and the radiator. It utilizes air flowing through the grate to assist in cooling. If the condenser is blocked or clogged by road debris, air won't reach it, preventing the refrigerant from cooling correctly.
If you have a faulty condenser, you may be able to see the problem by looking through the grate. Also, consider whether your car A/C problems started after a fender bender or bumper bump, in which case your condenser might have broken on impact.
3. Broken Compressor
The compressor is the heart of your car's A/C. It's responsible for circulating the refrigerant through the system. If this part isn't working correctly, the antifreeze won't be able to reach the condenser for cooling.
Compressor issues tend to pop up after long periods of inactivity, such as long winters when A/C isn't necessary. However, to prevent this from happening, many newer vehicles keep the condenser active year-round by activating it under the defrost setting.
4. Problems with the Electrical System
If all the A/C components are in working order, your car may be blowing hot air because of an electrical issue. A frayed wire or a blown fuse can prevent an otherwise healthy A/C from functioning. Diagnosing and correcting an electrical problem begins with performing a complete visual inspection of your car's fuse box and wiring.
If any of these issues are causing your car to blow hot air, drive to your local Tires Plus. We'll give your A/C a thorough and accurate inspection. We'll explain what's needed now, and what can wait, so the decision's yours. After all, at Tires Plus, you're in the driver's seat. Let's make sure it's a cool one.
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