Why is my Mercedes SL500 blowing hot air?

When the air conditioner in your 1998 Mercedes-Benz SL500 starts blowing hot air, you likely have a freon leak. Recharging the freon in your AC system is an inexpensive and easy first step to restoring the cooling capacity of your A/C system.

What kind of a / C system does Mercedes SL500 have?

The A/C system in your SL500 consists of a compressor that is belt-driven, an evaporator and freon. If there is a problem with your compressor or evaporator, adding freon will not restore cooling.

How to add Freon to a 1998 Mercedes-Benz SL500?

How to add freon to your 1998 Mercedes-Benz SL500: hook up the can of refrigerant (likely r-134a) to the low pressure port. When your compressor kicks on, add freon to the correct pressure. In addition to cooling, freon lubricates the compressor when it runs.

The A/C system in your SL500 consists of a compressor that is belt-driven, an evaporator and freon. If there is a problem with your compressor or evaporator, adding freon will not restore cooling.

What causes a Mercedes SL Class R129 to over heat?

A stuck close thermostat will create over heating and if it is stuck open the engine will run too cool. If your overheating and one coolant pipe is hot and the other is cold you may have a bad coolant pump. A clogged radiator can cause overheating and a broken hose can leave you stranded.

What are the most common Mercedes Benz air suspension problems?

Summary of the most common problems with Mercedes-Benz air suspension systems, DIY solutions are provided in the next section: Air suspension compressor Failed (Easy DIY repair, Average cost $200) The air suspension compressor does just that, generates compressed air. It fills up all the air struts, and it can fail.

What are the signs of a low compression Mercedes?

The first signs of low compression is a lack of power, the engine backfiring, or the distinct smell of gasoline from your exhaust. Another sign of low compression can include your Mercedes-Benz not starting, even though the battery, oil, and fuel level are good.

What’s the value of a 1990 Mercedes 500SL?

**Figure based on a stock 1990 Mercedes-Benz 500SL valued at $11,800 with OH rates with $100/300K liability/UM/UIM limits. Actual costs vary depending on the coverage selected, vehicle condition, state and other factors.

How does compression work in a Mercedes Benz engine?

Like all internal combustion engines, a key part of your Mercedes-Benz’s regular operation is compression. This is the process of pressurizing the mixture of gasoline and air inside a cylinder to insure the correct combustion cycle is completed.

What was the Mercedes Benz SL in 1990?

The R129 version of the Mercedes-Benz SL is no exception. For the 1990 model year, Mercedes had prepared a replacement for the R107 design that had served the SL-Class since 1972. The new R129 design received a state-of-the-art adjustable sport-luxury suspension and an all-new chassis.

How does a refrigerant work on a Mercedes SL500?

Recharging the freon in your AC system is an inexpensive and easy first step to restoring the cooling capacity of your A/C system. Most refrigerants include a leak sealer that will seal small leaks in addition to filling the R134a refrigerant. The A/C system in your SL500 consists of a compressor that is belt-driven, an evaporator and freon.

What does the air conditioner do on a Mercedes Benz?

The Air conditioning system on your Mercedes-Benz includes many sensors and components including the air conditioner compressor. Being the heart of the entire system, the A/C compressor’s role is to add pressure by taking the refrigerant and compressing it.

What to do if your Mercedes AC unit stops working?

Be aware that if you reset the unit and it again stops working, you need to take the vehicle in to the dealership for repairs. Insert the key into the Mercedes ignition and turn the ignition cylinder to the “2” position. This is as far as the cylinder will go without cranking the engine.

How to troubleshoot your Mercedes Benz air conditioner?

Identify the location of your compressor. Look at the pullyer and you should be able to see if it spining or not. The engine running turn the A/C on max cool, set fans high, and make sure that the clutch is engaging on the compressor. The pulley spins any time the engine is running. The center part of the A/C pulley only engages when the A/C is on.

How do you reset the AC system on a Mercedes?

Hold these buttons down for about five to 10 seconds, or until the LED lights on both buttons start flashing. Wait 45 to 60 seconds for the LED lights to stop flashing. Then turn off the car. Wait 60 seconds and then start the car engine again.

What should the pressure be on a Mercedes air conditioner?

Read the pressure in your air conditioner system. If the pressure is low the gauge reading will be in the white zone. If the pressure is normal then the gauge should be in the green zone. You should not have a reading on the HIGH / RED zone except when the car is turned off, in which case it is normal. Always keep the can UPRIGHT.

What should the pressure be on a Mercedes Charger?

If the pressure is normal then the gauge should be in the green zone. You should not have a reading on the HIGH / RED zone except when the car is turned off, in which case it is normal. Always keep the can UPRIGHT. As you charge the system shake the can slightly every two or three seconds while you are charging.

What causes a Mercedes to go into lime home mode?

If you are reading a P0301 through P0312 code plus another code, let say P0100. It is very likely that the P0100 fault code which refers to a malfunction in the mass air flow sensor circuit is also causing the misfire codes and even a limp home mode. Lime home mode means the transmission gets stuck in gear, typically in second gear.

What happens when catalytic converter is clogged in Mercedes?

If your catalytic converter is clogged you will notice a drastic drop in fuel efficiency and real struggle getting your Mercedes to accelerate. If the cat is completely clogged your car won’t even start.

Why does my AC blow hot air only?

It applies only if your cars a/c compressor is turning on and the pipes by the compressor get cold but in the interior the car blow hot heater air. In this video we are working on a 2006 Nissan Sentra. But this issue happens on any brand in any car and the vent producing the issue is always in the same spot.

How to fix a car that’s blowing hot air?

Scotty Kilmer, mechanic for the last 45 years, shows how to fix a car that is blowing really hot air, even though the AC system is turned on full cold. Often a bad main AC control unit goes bad, and he shows how easy it can be to replace. 1. Autel Diagnostic Tool: http://amzn.to/2nrT5op 2. Screwdriver set: http://amzn.to/2jaHIfP 3.

Why does my Volvo S70 have no AC?

Symptoms on my 1997 S70 was either there was a quick fan blow, everything stopped then the two lights flashed for 20 secs or nothing happened the two lights just flashed, no A/C and no fan. I took it to the dealer for a very expensive repair close to 700 dollars and the fix was a fan motor drawing excessive current.

How to troubleshoot and repair vents low air flow?

Easy step by step guide one how to troubleshoot and repair vent low air flow, this article pertains to most vehicles. Step 1 – Most air control vents are equipped with a flow control door that is located at the vent outlet. This door is controlled by a thumb wheel that when activated will open and close the vent air flow door.

Why does my car have low air flow?

If this fan motor is starting to fail it will cause the fan motor to run at a lower speed resulting in low air flow. To test this condition an amp meter is needed, connect the meter lead to the power wire of the fan motor.

Why does my car have no air in the vents?

Step 3 – A fan blower motor is controlled by either a switch in the passenger compartment or by a computer. If this fan motor is starting to fail it will cause the fan motor to run at a lower speed resulting in low air flow. To test this condition an amp meter is needed, connect the meter lead to the power wire of the fan motor.

How does Mercedes Benz air conditioner system work?

While the pictures on this article are of Mercedes Benz cars, this guide is written to apply to all makes and models. How the A/C System Works. A/C compressor not engaging.

How much does a Mercedes Benz air conditioner cost?

’01 E320 15k miles.. DL – I would find a competent aircon shop for around $80 or less to evacuate the existing refrigerant, hold at vacuum to check for major leaks, then they will refill with 100% fresh refrigerant to restore the system. Keep the beat !

While the pictures on this article are of Mercedes Benz cars, this guide is written to apply to all makes and models. How the A/C System Works. A/C compressor not engaging.

What is the code for Mercedes Benz air conditioning?

Also make note of the recharged bar pressure (17) – you can periodically check code 7 to make sure the system is holding the refrigerant pressure – if it decreases over time you have a slow leak and need to address it. Hope this helps and good luck! 2001 E55, 1999 C43. thanks!

How to troubleshoot your Mercedes medic air conditioner?

Turn the A/C ON. If you have an Economy button make sure that is off. Make sure fan is on HIGH, temperature selector is turned all the way to COLD, and that the A/C and recirculate light indicators are on. Set the temperature to cold, the lowest setting. Set the cooling fans on high on the climate control.

What can I use to recharge my a / C compressor?

You can use a R134a recharge kit to recharge your system if the A/C compressor is not working. Here are a couple of highly rated kits that you will find on Amazon.

Why is my car AC not working after recharge?

There could be numerous reasons for the improper AC working after you recharge it. You can handle the situation by finding out the most common reasons for this right away! 1. The Compressor is Unable to Connect Numerous reasons can cause the compressor to not to connect with the vehicle AC.

Do you have to recharge the AC after changing the compressor?

And then, you must recharge the ac after changing the compressor to start blowing the cold air again. People usually hire a mechanic for this procedure. But you will be happy to know that you can also DIY the project without paying for the mechanic.

Why is my a / C compressor not working on my Mercedes?

One other reason why the A/C compressor does not engage is the fact that the system may be low on R134 refrigerant. Typically older cars may have very slow leaks that may require top off with refrigerant every couple of years. You can use a R134a recharge kit to recharge your system if the A/C compressor is not working.

What to do if your AC compressor is not cooling?

As a solution, it is recommended that you run the AC on full speed once in three weeks in winters and monsoon when you don’t use the AC frequently. There is nothing to worry about if your AC compressor running but not cooling. Sometimes, it just needs a visual inspection to determine which component is malfunctioning.

Why is the air conditioner on my Mercedes not working?

The hot summer days are here and you realize that the air conditioner on your Mercedes-Benz is no longer blowing cold air. A/C problems can be complicated but it also can be something as simple as the system being low on freon. This is usually one of the most common problems.

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