This component forces cold exterior air through the radiator to speed up the cooling process. 2 comments . radiator fan motor is working, fan motor should come on right away with a/c on, if it don't more then likely bad radiator fan motor, if it comes on, then we know fan motor is good, turn a/c back off, fan motor should come on at about 220 deg. Most problems were related to electronics. ), the radiator fan, or a failed thermostat. Cooling Fan; Cooling Fan problems of the 1996 Mercedes Benz 300 . According to the lawsuit, Mercedes has been aware of the radiator problem for a long time because dealers were issued technical service bulletins in 2005 about the radiator and transmission problems. The ESP/BAS, ABS, Break pads and Foot break warning lights are all on. Insert the key into the Mercedes ignition and turn the ignition cylinder to the "2" position. The customer complaint is that the cooling fan runs constantly and that the air-conditioning is not as cold as usual. Confirm that there are no wiring issues to the sensor. If electrical checks return results that are within specifications, replace the pressure sensor. 5) Bad Cooling Fan Control Unit. Cooling fans stay on at all times. The radiators have additional cooling fans to pull cool air through them and help dissipate heat. Mercedes-Benz Owners (MBO) Forum, exists for the benefit of owners of Mercedes-Benz cars. Press and hold the defrost and recirculated air buttons simultaneously. (3) 3 product ratings - 02-06 MERCEDES BENZ S550 S430 RADIATOR FAN A220 500 0193 GENUINE OEM Finally use the AssistPlus to run a Quick Test and ensure there are no new fault codes. Subscribe to the Autologic Youtube channel. The Mercedes-Benz Owners is a completely independent organisation. The coolant sensor is the one near the … ). Also please check out the statistics and reliability analysis of Mercedes Benz C230 based on all problems reported … I ONLY RECOMMEND THIS ONE. Head unit center console made a loud "a ball rolling around" noise with 24 hours of buying the car. Mercedes Radiator Fans improve the circulation of cool air into the engine's coolant system, especially … One problem related to cooling fan has been reported for the 2007 Mercedes Benz C280. Use the AssistPlus to check the reading in the climate control module. Cooling Fan problem of the 2001 Mercedes Benz C240 1. Question: I have a 2008 Mercedes GL 450. 99 Mercedes c280 the radiator fan is not turning on with a/c on. The cooling fan has an integrated control module to control speed via a control module. Mercedes Benz C230 owners have reported 37 problems related to engine and engine cooling (under the engine and engine cooling category). The most recently reported issues are listed below. This can lead to overheating, especially when the vehicle is at a stop, where there is no forward motion by the vehicle to pass air over the radiator. Spray cold water from a hose on the radiator his will help get the air … Check the power supply, signal and ground of the 3-pin connector at the pressure sensor: Confirm electrical line resistances to the SAM using the appropriate wiring diagram. This should be approximately 5 - 6 bar. Then set the cooling fans on high on the climate control while the temperature selector is set to the lowest or cold setting. Symptoms: The customer complaint is that the cooling fan runs constantly and that the air-conditioning is not as cold as usual. Mercedes 170: i have a 1996 (n reg)..radiator fan..faster..rev i have a 1996 (n reg) mercedes C180 AUTO Elegance (w202) and my radiator fan is always running and runs faster when i rev the engine making it sound like a hovercraft. The Daimler Group are the proprietors of the Community Trademarks "Mercedes", "Mercedes-Benz" and the three pointed star logo. Caution: Evacuate the air-conditioning system of all R134a gas before the system is opened. We can supply a huge selection of parts, including genuine Mercedes parts, aftermarket parts and performance parts for both Mercedes Benz and Smart cars! ), the radiator fan, or a failed thermostat. Cooling Fan Relays and Switches Mercedes-Benz C-Class (1994-2000) W202 Cooling Fan Relays and Switches. As the system is still currently empty, this should read 0 bar. Assuming the fan doesn't run on it's own with the key off, you may have an issue with the coolant temperature sensor signal. September 13, … Capacity information is found on the AAC refrigerant fill sticker, located under the engine hood (bonnet). Mercedes-Benz W211 models utilize an electronic cooling fan integrated into a cooling fan shroud. The Mercedes Radiator Fan improves air circulation in the radiator so that the cooling system is successfully cooled. This video will show how to fix cooling fan issue on most Mercedes vehicles.THIS IS THE BEST AND VERY AFFORDABLE SCAN TOOL. 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. Step 2. 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. … Failure Date: 01/19/2015 One problem related to cooling fan has been reported for the 1996 Mercedes Benz 300. If it is higher, the air-conditioning control module presumes that the pressure is high and assigns the fan control module to run at 90% PWM actuation. Locate wiring in order to avoid chafing of harnesses. , where would the problem be? Engine Cooling Fan Running at Constant High Speed Brand: Mercedes Models: W204 C Class, W207 and W212 E Class, GLK Class ... September 23rd, 2016 mercedes air conditioning cooling fan. Failure Date: 02/14/2015 The vehicle has been in the dealer six times in a four month period of time. This problem … While there are a variety of reasons your Mercedes-Benz E320 is overheating, the most common 3 are a coolant leak (water pump, radiator, hose etc. (This is the same as the “Check Engine” or “Service Engine Soon” light.). The most recently reported issues are listed below. Answer: The problem could be in the cooling fan circuit, a faulty battery, or (less likely) the charging system. Cause. A common problem with E-Class, S-Class, C-Class, ML-Class and other models. Any information displayed on this website has not been approved by the Daimler Group and the products or services we sell or advertise via this website have not been endorsed by the Daimler Group. If the sensor's signal is much hotter than correct or goes out of range then it will turn the cooling fan on all the time, although you would normally expect a code to set. The defrost button has three lines going through it, while the recirculated air button has a … if it does after engine is … For example, at a coolant temperature of 51.0°C (123.8°F) the refrigerant pressure should be no more than 12 bar. This site uses cookies. Check and make sure coolant level is good, also check that elec. Symptoms: My 1998 W210 E200 seems to be having a litany of problems one of which being the fan that comes on and remains so as soon as I start driving. If you use a scan tool, the BMW fault code is 30C1. This site offers a 'one-stop' online parts shop for Mercedes Benz and Smart car parts at great prices. The noise heard is louder than normal for a cold engine. Cause This problem is often caused by a faulty pressure sensor located on the air-conditioning condenser. The thermostat, also considered as the watchdog of the cooling system has two failure scenarios- getting stuck in an open position, and … ... Mercedes AdBlue Problems. Set the cooling fans on high on the climate control. Step 3: Check the cooling fan. Replace the sensor and confirm good location of the wiring connector. If accessing fault codes, there are no relevant DTCs stored in the engine control module (ECM) or signal acquisition module (SAM). By continuing to use this site, you are agreeing to our use of cookies. Cooling Fan problem 1. Shortly after the engine starts the malfunction indicator light (MIL) illuminates. ... then shut down, let the engine cool, this should self bleed the air, refill the coolant bottle and retest for your problem, restore the wiring, the not running fan is for AC. it has codes 421 & 422 compressor is working but not cooling high side pressure is going up to 450 ... windows ,fan,dash,etc. The most recently reported issues are listed below. Qualification for membership is for owners of such cars and true enthusiasm for the marque. The customer complaint is that the cooling fan runs constantly and that the air-conditioning is not as cold as usual. This control module is an electrical component connecting the fan to the rest of the system. If you have a mechanical fan that is not functioning, the fan … Last but not least, if the airflow in your Mercedes seems sluggish, take a look at your cooling fan unit. This website is not in any way connected or affiliated with the Daimler Group. Cooling Fan; Cooling Fan problems of the 2007 Mercedes Benz C280 . (You must log in or sign up to reply here. If your cooling fans stop working the relays and switches should be the first place to check. Vehicle was inspected by dealer who diagnosed that the electronic control unit / module (ecu / ecm) or cooling / suction fan … Cooling Fan problem of the 2015 Mercedes Benz E350 1. Don't start … There is no Schraeder valve on the sensor and removing the sensor allows the gas to escape into the atmosphere. This is as far as the cylinder will go without cranking the engine. Cooling Fan problem … I … If the electric cooling fan is not coming on or if the mechanical fan is not moving at a high rate of speed, then there is a problem with its functioning. The fan motor could be pulling too much current or the circuit has too much resistance. Have those points checked first. Look at refrigerant pressure, specially noting if it too high for the ambient temperatures. Membership is extended to non-owners with a genuine interest in the best engineered car in the world. Also check the AAC pressure at stand still / cold. Mercedes Start/Stop Not Working. A loose or corroded connection can cause AC issues but is usually a relatively simple fix. Failure Date: 08/13/2013 My 2001 mercedes-benz C240 engine cooling or suction fan runs constantly at high speed nonstop at startup until vehicle is turned off. Since cars like the Mercedez Benz are designed to have the radiator cooling fan kick in when the A/C is on, make sure to check if the cooling fans on the radiator are working when the air … The customer’s complaint is that there is a loud rattling noise when the engine is first started. A-Class/B-Class C-Class (W202/W203/W204) C-Class (W204) E,CE,D,CD,TD,TE Class (W123) E-Class Sedan (W124) 1986-1995 E-Class (W210) 1995 - 2002 E-Class (W211) 2003 & later E-Class Sedans (W124) 500E & E500 E-Class Coupes & CLK (W207-209) E-Class Sedan (W212) & Coupe … 1 Rust Rust behind license plate / trunk area. Of the 2 cooling fans at the front of the A/C - Mercedes-Benz 1990 300 Diesel question. Discussion in 'Introduce yourself' started by Khimario, Jan 24, 2017. Fill the system with the specified amount of refrigerant and oil. 41% of the time it's PFS Parts Ltd. is a specialist parts company established in 2003. We still remember an older Mercedes-Benz 240D that had over 1 million miles still running … 3. Check to see that the cooling fans on radiator are running when the air conditioning is on. Most cars are designed to have the radiator cooling fan kick in when the A/C is on. List of the most common Mercedes-Benz problems. The engine cooling fan control modules are: Vehicles equipped with a diesel motor: CDI control unit or the AAC control unit or comfort … One of the main challenges with Mercedes-Benz cars is rust. Mercedes-Benz Models & Chassis. Radio would … mike. This problem is often caused by a faulty pressure sensor located on the air-conditioning condenser. While there are a variety of reasons your Mercedes-Benz E350 is overheating, the most common 3 are a coolant leak (water pump, radiator, hose etc. Before replacing, first fully evacuate the air-conditioning system. For the Mercedes Benz cars, there are three major causes of overheating: thermostat failure; radiator fan failure; and coolant leakage in hoses, radiator or the water pump. The radiator coolant and wiper water warning lights are also on. Optional Information: Year: 2000 Make: Mercedes-Benz Make (other): Model: S500 Engine: 5 liter Already Tried: - no power to radiator fan - fan turns freely - water level is fine - car heats up to 95C - normal is 80 C - #48 is fine visually and test OK with a volt meter When the engine starts to get above the normal operating temperature, watch the cooling fan. The cooling fan doesn't run even at a … : 02/14/2015 the vehicle has been reported for the ambient temperatures the problem could be pulling too current... Via a control module the 2015 Mercedes Benz C240 1 front of the time it's Discussion 'Introduce! High for the benefit of owners of such cars and true enthusiasm for the 2007 Benz. 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