Is there a problem with the Mercedes cooling fan?

Is there a problem with the Mercedes cooling fan?

Check the mass airflow sensor first. If it checks good then more than likely the ecm will have to be replaced. Loading…

Why does my radiator fan run full speed when I start the car?

Immediately upon starting the car, the radiator fan begins to run full speed, even though the car is stone cold. The AC is OFF. The radiator and condenser are BRAND NEW. This problem existed before and after the radiator was replaced. The fan continues to run at its maxiumum speed, regardless of the engine temperature.

Why does my Mercedes-Benz A / C blower run uncontrolled?

But under fault conditions it could fail as ‘always on’ or ‘never on’. Mostly (according to this forum) a failed BR causes the a/c blower to run uncontrolled. Btw your WIS a/c circuit diagram is not identical to mine for W208. However the blower motor/regulator part is the same.

Why does my Mercedes Benz fan keep running?

Automotive information based around Mercedes-Benz information and repair assistance along with other makes and models. No matter what car you own or need help with, my tips and tricks and teachings can help you along the way. An error occurred while retrieving sharing information. Please try again later.

Immediately upon starting the car, the radiator fan begins to run full speed, even though the car is stone cold. The AC is OFF. The radiator and condenser are BRAND NEW. This problem existed before and after the radiator was replaced. The fan continues to run at its maxiumum speed, regardless of the engine temperature.

But under fault conditions it could fail as ‘always on’ or ‘never on’. Mostly (according to this forum) a failed BR causes the a/c blower to run uncontrolled. Btw your WIS a/c circuit diagram is not identical to mine for W208. However the blower motor/regulator part is the same.

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 kind of air conditioner does a Mercedes Benz have?

The A/C system on your Mercedes-Benz includes many sensors and components including the air conditioner compressor. The A/C compressor is the heart of the system. One crucial element of the A/C compressor is the clutch. It is important to understand how to check if the A/C compressor is engaging or not.

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.

What to do if your Mercedes Benz fan is stuck?

Not hard to do, just drop the blower motor and replace the regulator. The hardest part is positioning your self under the dash and looking upwards to locate the mounting screws. Hi Paul, just wondering if you found a solution to your stuck fan.

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!

Why does my car fan keep running when the car is turned off?

Look in your owners manual. I think it’s primarily for cold weather, it keeps the car interior warm until the heater core completely cools down. Not to say you don’t still have a problem separate from that. It keeps running for hours unless I unplugged the battery or the motor itself. That is the design.

What kind of car is the Mercedes CLK?

The early 2000s was the time of coupes. Most of the people prefer coupe or sedan class over another segment of cars. The Mercedes Benz CLK second generation (W209) was a great cruiser that can help you to cover long distances. Most of the critical parts of this coupE are as same as the C-Class.

What kind of fuse box does a Mercedes CLK II have?

Actual Mercedes-Benz CLK II (W209) (2002-2010) diagrams & schemes (fuse box diagrams & layouts, location diagrams, wiring diagrams etc.) may vary depend on the model version.

Why is my engine cooling fan running at constant high speed?

There is no Schraeder valve on the sensor and removing the sensor allows the gas to escape into the atmosphere. Replace the sensor and confirm good location of the wiring connector. Locate wiring in order to avoid chafing of harnesses. Use the AssistPlus to check the reading in the climate control module.

What kind of fan does a Mercedes E350 have?

2008 Mercedes E350 Convertible… Fan comes on at start-up at FULL SPEED. Stays on and continues to run after key is taking out of ignition. Already replaced coolanttemp sensor, radiator, and cooling fan…. Car was involved in a frontal crash… Any ideas? Show More Show Less Ask Your Own Mercedes Question Share this conversation

Check the mass airflow sensor first. If it checks good then more than likely the ecm will have to be replaced. Loading…

The early 2000s was the time of coupes. Most of the people prefer coupe or sedan class over another segment of cars. The Mercedes Benz CLK second generation (W209) was a great cruiser that can help you to cover long distances. Most of the critical parts of this coupE are as same as the C-Class.

Actual Mercedes-Benz CLK II (W209) (2002-2010) diagrams & schemes (fuse box diagrams & layouts, location diagrams, wiring diagrams etc.) may vary depend on the model version.

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.

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.

Why does my air conditioner spin when the engine is running?

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. If the clutch is engaging and disengaging rapidly, the refrigerant may be low. Locate the Low Pressure A/C recharge port.

What are the symptoms of a bad cooling fan relay?

1. Engine running hot One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. If you notice that your engine is running at higher temperatures than normal, that may be a sign that the relay is not functioning properly.

Why is the cooling fan running on high?

2007 Mercedes clk350 , why… 2007 Mercedes clk350 , why is cooling fan running on high ? As soon as car starts the cooling fan runs high, have checked ac temp sensor (is good) …still runs high regardless if ac is on/off.

How often does a car cooling fan stay on?

Cooling fans stay on at all times Average rating from 129,472 customers who received a Vehicle Engine Cooling Inspection. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool.

Why is my Mercedes radiator fan running on high speed?

Please try again later. This is a very common problem with the Mercedes radiator cooling fan running constantly on high speed. The problem in most cases is a bad ecm so in order to fix it the ecm will have to be replaced and programmed to work with your vehicle. Check the mass airflow sensor first.

Is the Mercedes C230 single engine cooling fan working?

Mercedes C230 Single Engine Cooling… Mercedes C230 Single Engine Cooling Fan is Not Working Large Wires Red and Black have 12 volts and Good Ground. Small Wires have 12 volts pos and 3.1 volt Ground.

1. Engine running hot One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. If you notice that your engine is running at higher temperatures than normal, that may be a sign that the relay is not functioning properly.

What should I do if my engine cooling fan is running at high speed?

Replace the sensor and confirm good location of the wiring connector. Locate wiring in order to avoid chafing of harnesses. Use the AssistPlus to check the reading in the climate control module. As the system is still currently empty, this should read 0 bar. Fill the system with the specified amount of refrigerant and oil.

Why is my ml 350 G8 making so much noise?

We don’t have your model, but this other document and post which address the fan noise in the ML 350 G8 may offer the cause or causes of your fan noise.

Why is my Mercedes air conditioner not working?

Your Mercedes vehicle will flash a host of service lights to inform you when something might be damaged inside the car. If the air conditioner unit is not running normally or is only blowing out warm air, it may be a temporary fault. Sometimes the unit isn’t actually damaged, and resetting your climate control unit …

What are the problems with a Mercedes Benz?

Top 5 Mercedes-Benz no start problems 1 Engine Click, No Start 2 Engine Dies Right After It Starts 3 Car turns over, but it won’t start 4 The car makes a clicking noise but won’t start. Hint: Starter Problem or Low Battery 5 Key will not turn the ignition More …

Why are my cooling fans running at all times?

3. Cooling fans stay on at all times. If the cooling fans are staying on at all times, this is another (less common) symptom of a possible problem with the cooling fan relay. If the relay shorts internally, it may cause power to be permanently switched on, which will cause the fans to run at all times.

Cooling fans stay on at all times Average rating from 129,472 customers who received a Vehicle Engine Cooling Inspection. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool.

Why does my Mercedes Benz radiator keep running?

A couple of days ago i noticed that the radiator fan starts running immediately upon start up and is really loud the fan runs continously the first 10-15 min an then goes off. Its as if the fan is running full blast like the car thinks its overheating however the engine cannot be overheating as it happens immediately upon startup.

Why does the engine fan run all the time?

The sensor shown in the diagram is for air conditioning. The sensor we need to find is actually a temperature switch somewhere in the cooling system and may have failed safe in the closed position causing the fan to run all the time. what abut if i connect the car to the OBD II? i can bay one if that can tell me the problem within my car?

What should I do if my fan is running at a constant high speed?

Confirm that there are no leaks at the sensor, that the air-conditioning is operating as expected and that the fan no longer runs at a constant high speed. Finally use the AssistPlus to run a Quick Test and ensure there are no new fault codes.

Why is my Mercedes radiator cooling fan not working?

This feature is not available right now. Please try again later. This is a very common problem with the Mercedes radiator cooling fan running constantly on high speed. The problem in most cases is a bad ecm so in order to fix it the ecm will have to be replaced and programmed to work with your vehicle. Check the mass airflow sensor first.

The sensor shown in the diagram is for air conditioning. The sensor we need to find is actually a temperature switch somewhere in the cooling system and may have failed safe in the closed position causing the fan to run all the time. what abut if i connect the car to the OBD II? i can bay one if that can tell me the problem within my car?

What should the radiator fan be running at?

The fan continues to run at its maxiumum speed, regardless of the engine temperature. I allowed the car to run today from cold to just above 80 deg. C before sutting it off today.

What is the fuse box diagram for a Mercedes CL500?

Here you will find fuse box diagrams of Mercedes-Benz CL500, CL600, CL55, CL63, CL65, S280, S320, S350, S400, S430, S500, S600, S55, S65 (1999, 2000, 2001, 2002, 2003, 2004, 2005 and 2006), get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.

When did the Mercedes Benz CL Class come out?

In this article, we consider the third-generation Mercedes-Benz CL-Class (C216) and the fifth-generation Mercedes-Benz S-Class (W221), produced from 2006 to 2014.