Mercedes

Have Mercedes questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

I have 1989 slk230 and the radiator fan is not working. i…

Customer Question
I have 1989 slk230...

I have 1989 slk230 and the radiator fan is not working. i have replaced the fan and control module and it is still not going on when it should?

Mechanic's Assistant: Has the car been overheating? Have you checked the fuses?

Only once

Mechanic's Assistant: Are you fixing your SLK230 yourself? What have you tried so far?

Yes i checked the fuse and they appeared in good working order

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Yes, and was at the local dealer and they could not solve the issue

Submitted: 9 months ago.Category: Mercedes
Show More
Show Less
Ask Your Own Mercedes Question
Answered in 37 minutes by:
9/18/2017
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 9 months ago
Lou P. master tech
Lou P. master tech, Mercedes Technician
Category: Mercedes
Satisfied Customers: 6,017
Experience: 20 years Master Certified excellent fix rate and have access to factory wiring, and instructions.
Verified

Hello, my name is***** and i will do my best to assist you.I am going over your story now and will reply back soon with some info,thanks!

Ask Your Own Mercedes Question
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 9 months ago

where did you get the new fan and control module from?

assuming the control module you are speaking of is the one bolted to the fender well?

Ask Your Own Mercedes Question
Customer reply replied 9 months ago
from the local dealer, and yes it is the module on the fender wall
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 9 months ago

ok, so can you give me the build date on the drivers door sticker?

also what problems are you having that led you to the fan and module?

Ask Your Own Mercedes Question
Customer reply replied 9 months ago
12/96
vin# *****
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 9 months ago

on the control module check for power on the following wires with the key on

  • pink with red stripe
  • black with green stripe
Ask Your Own Mercedes Question
Customer reply replied 9 months ago
to answer your question the fan was not turning on when the car was hot. I decided to replace the fan and module due to the cars mileage [100k] and the ease of replacement
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 9 months ago

ok gotcha, did the temp ever get above 100?

the fan is mainly to come on for the ac, when the engine is running and the ac is on high the fan should come on.

when do you think you will be able to check those wires for power?

Ask Your Own Mercedes Question
Customer reply replied 9 months ago
i checked the power wire and they have power
Customer reply replied 9 months ago
also when I turn the fan on inside the car. the coolant light comes on? any idea why?
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 9 months ago

yes, could be because of a issue with the fan module.

also the washer and coolant low switches are tied together.

so check your washer fluid too lol.

next we need to check signal from the engine module.

Ask Your Own Mercedes Question
Customer reply replied 9 months ago
ok
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 9 months ago

im double checking the wiring.

Ask Your Own Mercedes Question
Customer reply replied 9 months ago
the windshield washer tank does have a leak and I need to replace it?
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 9 months ago

grey wire should have ground . when engine running and ac on high, fan should come on and ground voltage at that wire should be

ECT < 70 °C 1-1.9 VDC fan not running
A/C on 2-4 VDC fan running
ECT > 85 °C 2.5 -12.5 VDC fan running

ect means engine coolant temperature.

let me know if you get any type of voltage.

Lou

Ask Your Own Mercedes Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a mercedes mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Lou P. master tech Your Own Question
Lou P. master tech
Lou P. master tech
Lou P. master tech, Mercedes Technician
Category: Mercedes
Satisfied Customers: 6,017
6,017 Satisfied Customers
Experience: 20 years Master Certified excellent fix rate and have access to factory wiring, and instructions.

Lou P. master tech is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

< Previous | Next >

Meet the Experts:

MB Paul

MB Paul

Mercedes Technician

3,567 satisfied customers

Qualified Mercedes Benz Diagnostic Technician - 20+ years experience - Workshop Foreman for Mercedes

Marty

Marty

Mercedes Technician

29,460 satisfied customers

Bosch Certified Master Tech. Over 35 years experience.

Lou P. master tech

Lou P. master tech

Mercedes Technician

6,017 satisfied customers

20 years Master Certified excellent fix rate and have access to factory wiring, and instructions.

Michael Warfield

Michael Warfield

Factory Mercedes-Benz Technician

3,132 satisfied customers

Mercedes-Benz Master Certified technician

Matt

Matt

Engineer

643 satisfied customers

Mechanical Engineer with 23 years experience in the auto industry, 8 yrs in formula 1 engine testing

promerc

promerc

mercedes diagnostic technician

553 satisfied customers

Qualified mercedes diagnostic technician & service team manager , ATA registered Master tech

Hipo64

Hipo64

Mercedes Technician

444 satisfied customers

Work and diagnose electronics on daily basis.

< Previous | Next >

Related Mercedes Questions
2008 MB S63 AMG need to know correct type of coolant to use.
2008 MB S63 AMG need to know correct type of coolant to use. Coolant other than MB brand that I can get hopefully at a local parts store.… read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
6,017 satisfied customers
On display says Coolant. 120 000. 2007 Dodge Sprinter.it
2007 Dodge Sprinter.it says shut the engine off.I ‘ve checked the antifreeze,added it fool ,but still it says shut the engine off and no bad noise,it runs normally … read more
Matt
Matt
Engineer
Bachelor's Degree
643 satisfied customers
1995 C280 with oil in coolant and overheating, what are
1995 C280 with oil in coolant and overheating, what are possible causes? … read more
Kevin
Kevin
workshop foreman /master tech/mot tester
1 satisfied customers
Coolant indicator fault showed up on dash, car was not low
Coolant indicator fault showed up on dash, car was not low on coolant but is maintaining a check engine light what is srong … read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
6,017 satisfied customers
Where is the engine coolant temperature sensor located for a
Hi, Where is the engine coolant temperature sensor located for a 2007 GL450 Mercedes Benz, do you have a diagram … read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
6,017 satisfied customers
Not getting supply power to my coolant fan module. Not sure
Not getting supply power to my coolant fan module. Not sure where to check for the source power. … read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
6,017 satisfied customers
1996 mercedes benz c220 coolant light came on the other day
hi 1996 mercedes benz c220 coolant light came on the other day it was low added coolant to the resovior and found there is oil in the coolant ionly in the resivor and only abot 25%of the resivor is oi… read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
6,017 satisfied customers
I have an oil leak in my coolant reservoir. Its a mercedes
Its a mercedes benz CLA 250? No I have never replaced the gaskets … read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
Can the C230 engine run without coolant. It's 250 000 km.
Hello JA: Hi. How can I help? Customer: Can the C230 engine run without coolant JA: How many miles on the car? How has your mileage been lately? Customer: It's 250 000 km JA: What year is your C230? C… read more
Kevin
Kevin
workshop foreman /master tech/mot tester
1 satisfied customers
Would I be able to change the coolant thermostat on a 2012
Would I be able to change the coolant thermostat on a 2012 GL 450, or is this really a shop job. … read more
vwtech0405
vwtech0405
VW Technician
Associate Degree
8,868 satisfied customers
I had a low coolant warning, check the reservoir and
I had a low coolant warning, check the reservoir and everything seemed normal so i didnt add the coolant and went out with the 2016 gl450. When returning the level of the meter started fluctuating bac… read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
6,017 satisfied customers
I need to replace the radiator, due to coolant leak, on my
I need to replace the radiator, due to coolant leak, on my 2002 S430. Are there step by step instructions available? … read more
TIM MOHR
TIM MOHR
SHOP OWNER
Master's Degree
8,037 satisfied customers
Lou.. when I am gonna install my coolant temp sensor and
Lou.. when I am gonna install my coolant temp sensor and thermostat do I have to take the O-rings and lubricate them ? If yes , lubricate with the coolant?… read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
6,017 satisfied customers
Lou ...can I replace coolant temp sensor with thermostat and
Lou ...can I replace coolant temp sensor with thermostat and water pump being removed? Looks like to me.. thermostat and water they seems like holding the sensor..… read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
6,017 satisfied customers
Lou... I have a question how to bleed coolant system easy
Lou... I have a question how to bleed coolant system easy way? I never done this ... I read on forums... that some people opened the cap from refill reservoir ..than start a car and squzee the upper r… read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
6,017 satisfied customers
Last night my 1999 SLK 230 Mercedes coolant reservoir hose
Last night my 1999 SLK 230 Mercedes coolant reservoir hose broke off. It seems somehow coolant got into the mass airflow sensor area intake because it wasn't bolted down properly the tabs are broken o… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
5,323 satisfied customers
My eps light came on and my engine light and coolant level
My eps light came on and my engine light and coolant level light. I pulled my car over because as I accelerated the engine was sounding funny. Pulled over turned off car and it wouldn't crank waited a… read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
I need to know where the coolant temperature sensor is and
I need to know where the coolant temperature sensor is and how to replace. I have the part … read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
6,017 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x