WWWPerfA_ZN0W Report post Posted August 7, 2016 As long as there's passion in this "relationship" LOL! Thanks for the followup, good luck with the fix! Share this post Link to post Share on other sites
nate.shamblin Report post Posted August 7, 2016 Yea, it's a love hate relationship. But not sure if I love to hate it, or hate to love it. 1 Share this post Link to post Share on other sites
drs120new Report post Posted September 3, 2016 I am having similar problems with my 2007 Lincoln MKX. Does anyone know how to troubleshoot the cooling fan system down to the Cooling fans, the Fan Control Module, and the PCM components? I just don't want to go out and buy and replace and find out it is something else. Share this post Link to post Share on other sites
macbwt Report post Posted September 4, 2016 Pretty sure it is your fans. Never heard of a PCM issue not even once. Always the fans that fail. Strongly recommend OEM replacement otherwise you will be unhappy with aftermarket. Tend to not work or fail quickly. Share this post Link to post Share on other sites
enigma-2 Report post Posted September 4, 2016 Took mine in a couple of weeks ago for warm AC at idle, they replaced the fan assembly AND found it was a little low on refrigerant. Ran a vacuum test, passed, told me it's common to lose a small amount of refrigerant over the years due to seals swelling in the summer and shrinking in the winter. Just saying ... 1 Share this post Link to post Share on other sites
NeckDlight Report post Posted February 17, 2018 So is there a certain temperature the engine gets to and the pcm tells the fcm to turn the fans on. I have a 2008 Ford edge that over heated in traffic. I throw 12 volts and a ground to each fan and they do not work. After making a attempting at supplying power and ground for about 15 mins to each fan I decide to turn the fan while supplying power and ground and what do you know they start to pick up speed and run. I'm wondering if one fan went out then the other. I took my edge to a place and said there was a code with the fan control module in the history. But at the time it was operating ok. I'm just wondering if the fcm wiped the fans out or made them weak. Looking for assistance Share this post Link to post Share on other sites
macbwt Report post Posted February 18, 2018 (edited) So is there a certain temperature the engine gets to and the pcm tells the fcm to turn the fans on. I have a 2008 Ford edge that over heated in traffic. I throw 12 volts and a ground to each fan and they do not work. After making a attempting at supplying power and ground for about 15 mins to each fan I decide to turn the fan while supplying power and ground and what do you know they start to pick up speed and run. I'm wondering if one fan went out then the other. I took my edge to a place and said there was a code with the fan control module in the history. But at the time it was operating ok. I'm just wondering if the fcm wiped the fans out or made them weak. Looking for assistance Replace the whole unit and be sure it will work. Use motorcraft fans to be sure they will work and be compatible. Others have had mixed results with aftermarket. This link is the to MC Fan for 2008-2014 wo towing. http://amzn.to/2FboErA Edited February 18, 2018 by macbwt 1 Share this post Link to post Share on other sites
Runterborn Report post Posted June 17, 2019 I have, what seems to be, a very common problem with my 2013 Edge. Overheats in stop/go traffic or City driving. I put the AC on Max and pop the hood. Neither fan is spinning. After reading various threads about this, I start at the fusebox under the hood. Fuses good. Check the connections to the relay, nothing obvious, i.e. connectors not burnt or corroded, but the module itself looks like it might have gotten hot. The label on the module is discolored and flaking off. After another quick search I figure that I need to replace the relay. Relay replaced and still no fans. Replace fan assembly, with a Dorman, and return relay, still no fans. While I seem to be enjoying this game of throw parts at the problem, I honestly don't know where to go next. I read somewhere that the Cylinder Head Sensor may be bad which may be causing the relay to not turn off/on but cannot confirm that information. Any thoughts? Share this post Link to post Share on other sites
PaulSchott Report post Posted June 17, 2019 The temp sensor has nothing to do with the A/C turning on the fans. I'm not sure how to go about this but are you getting a signal from the computer to turn the fans on? Is there power going to the relay? I haven't heard very good things about Dorman replacement parts. I bought a mirror motor replacement from them and it was a POS. Test the electrical to the fan and see if there is a signal and power. 1 Share this post Link to post Share on other sites
mvan231 Report post Posted June 17, 2019 20 minutes ago, Runterborn said: I have, what seems to be, a very common problem with my 2013 Edge. Overheats in stop/go traffic or City driving. I put the AC on Max and pop the hood. Neither fan is spinning. After reading various threads about this, I start at the fusebox under the hood. Fuses good. Check the connections to the relay, nothing obvious, i.e. connectors not burnt or corroded, but the module itself looks like it might have gotten hot. The label on the module is discolored and flaking off. After another quick search I figure that I need to replace the relay. Relay replaced and still no fans. Replace fan assembly, with a Dorman, and return relay, still no fans. While I seem to be enjoying this game of throw parts at the problem, I honestly don't know where to go next. I read somewhere that the Cylinder Head Sensor may be bad which may be causing the relay to not turn off/on but cannot confirm that information. Any thoughts? Have you captured any wiring diagrams to start diving into the power and ground of the circuit itself? I looked them up and it looks like this isn't a typical relay controlling a high current circuit like a blower motor relay circuit would be. Apparently the module has a relay, but there is no direct method to power the fans. Which relay were you checking? I don't see a relay for cooling fans in the underhood fuse panel diagram. 1 Share this post Link to post Share on other sites
akirby Report post Posted June 17, 2019 Dormans suck - that might either be a bad unit or the connection isn't good. I would assume the temp sensor is the same one that's feeding the temp gauge so if that shows it overheating then that's probably not the problem. 1 Share this post Link to post Share on other sites
Runterborn Report post Posted June 17, 2019 38 minutes ago, mvan231 said: Have you captured any wiring diagrams to start diving into the power and ground of the circuit itself? I looked them up and it looks like this isn't a typical relay controlling a high current circuit like a blower motor relay circuit would be. Apparently the module has a relay, but there is no direct method to power the fans. Which relay were you checking? I don't see a relay for cooling fans in the underhood fuse panel diagram. There is a relay on the drivers side of the fan assembly. I have the towing package so there was one lead going in and two, one to each fan, coming out. Based on the diagram above the relay plugs into C1554. 1 Share this post Link to post Share on other sites
Runterborn Report post Posted June 17, 2019 14 minutes ago, akirby said: Dormans suck - that might either be a bad unit or the connection isn't good. I would assume the temp sensor is the same one that's feeding the temp gauge so if that shows it overheating then that's probably not the problem. That is what I am afraid of. I may just bite the bullet and buy and OEM to see if that fixes the problem. The removal and reinstallation was quite easy I must say. On a side note, our Edge has 198,000 miles on it and has had one type of electrical issue or another since we purchased the dang thing. Share this post Link to post Share on other sites
mvan231 Report post Posted June 17, 2019 50 minutes ago, Runterborn said: There is a relay on the drivers side of the fan assembly. I have the towing package so there was one lead going in and two, one to each fan, coming out. Based on the diagram above the relay plugs into C1554. That is quite interesting that it isn't in the diagram. Do you have photos of the unit? I wonder if you apply direct power to the fan motor power if it will spin. Could be that the cooling fan module itself is dead Share this post Link to post Share on other sites
Runterborn Report post Posted June 21, 2019 (edited) Ultimately I called the dealership and ordered an OEM fan assembly and installed it one night after work. The OEM assembly worked and both fans cycle as expected. The overheating issue is gone for now. Pulled the Dorman out and returned it. Edited June 21, 2019 by Runterborn 1 Share this post Link to post Share on other sites
akirby Report post Posted June 21, 2019 On 6/17/2019 at 12:45 PM, akirby said: Dormans suck - that might either be a bad unit Nailed it. Not the first time a brand new Dorman unit was defective. I got lucky - mine worked and we traded the Edge within a couple of months. Share this post Link to post Share on other sites
WWWPerfA_ZN0W Report post Posted June 25, 2019 Sometimes a simple swapout of the control module will make the aftermarket fans work. Share this post Link to post Share on other sites
