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Country Coach engine fan modulator

Yahoo Message Number: 61804
I have a 2002 Country Coach Allure and was told that the coolant sensor and the air intake sensor needed to be replaced to stop the fan from running at high speed. Now that they both have been replaced I am now told that the fan modulator also needs to be replaced, it is $611 for the part. Is this the real fix or is there another solution for this?

Re: Country Coach engine fan modulator

Reply #1 –
Yahoo Message Number: 61809
For what it is worth,I have a 1999 Allure and the fan has run on high since the day I took delivery. I didn't know any different until I started reading this forum. So it has run on high for almost twelve years with no problems, and I don't plan on fixing it now.

Re: Country Coach engine fan modulator

Reply #2 –
Yahoo Message Number: 61822

Sounds like they might be just throwing parts at the problem until it goes away. The coolant and air temp sensors can be check by meter to verify they are bad. You should tell them you want your old parts. There is a test procedure in the files section of the CC group site for the coolant fan system.

ddtuttle

aka Billy Byte (trusty hound)
2000 Allure #30443


From: jbrumfield98 To: Country-Coach-Owners@yahoogroups.com Sent: Wed, July 28, 2010 1:56:45 PM Subject: [Country-Coach-Owners] Country Coach engine fan modulator

I have a 2002 Country Coach Allure and was told that the coolant sensor and the air intake sensor needed to be replaced to stop the fan from running at high speed. Now that they both have been replaced I am now told that the fan modulator also needs to be replaced, it is $611 for the part. Is this the real fix or is there another solution for this?

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Re: Country Coach engine fan modulator

Reply #3 –
Yahoo Message Number: 61826
98 times out of 100 it will be the fan controller (the 600 buck part). Make sure that your dash air conditioner is turned off and that includes vent mode. That will make your fan run in the high mode also. Make sure you have 12 volts to the controller. Make sure you have coolant in the overflow tank. As said in another post, the water temp and the intake sensor can be checked with an ohm meter. There is data in the files section here for the resistance readings.
If you do replace the controller, there should be no extra charge for "programming" as the controller comes programmed from Sauer Danfoss. 600 is a good price as some have paid as much as 1100 for one.
As a side note, mine was bad and I had to drive it a couple thousand miles before I could get it replaced. I saw no drop in mileage with it on the fritz and saw no increase when it was replaced.
If you want to see what a controller looks like on the inside, I have posted pictures in the photos section.

Don

'02 Intrigue #11427
'02 Intrigue #11427

Re: Country Coach engine fan modulator

Reply #4 –
Yahoo Message Number: 61845
Don

I ordered my controller from the Dan Foss distributor for $385. I don't have the web site here but I got it from the group.

Dan 2006 Allure 31348

Re: Country Coach engine fan modulator

Reply #5 –
Yahoo Message Number: 61849
You can continue to do that but you might want to know that it is costing you an extra mpg of fuel to run the fan on high speed. I too had a coach with a faulty air sensor, once I replaced the sensor, and the fan cycled as it is designed to do, my mpg improved by 1 mpg.

Ray

2000 Intrigue 11040

Re: Country Coach engine fan modulator

Reply #6 –
Yahoo Message Number: 61855
I understand what you are saying about mileage, but I get consistently 8 mpg. If I was to get 9 mpg, it would have cost me $261.00 less for the 50,000 I have traveled with the coach. Figuring diesel at $3.00 per gallon. Also, I think 8 mpg is rather normal for my coach and I really wonder if it does make that much difference. It just seems to me alot of people are spending alot of money to fix this problem and I wonder if its that big of a deal and necessary.

Re: Country Coach engine fan modulator

Reply #7 –
Yahoo Message Number: 61856
I am not sure how you did your calculations, but according to mine 50,000 miles at 8 mpg is 6250 gallons. 50,000 miles at 9 mpg is 5555 gallons. This is a savings of 695 gallons. Using your figure of $3.00 per gallon, you would save $2,085. Even at only a 0.5 mpg increase, you would save over $1,000, more than the cost of the part.
As I mentioned to you when you posted your first message on the forum and I was approving your moderated post, I suggested a savings of one mpg, but wanted to see what the members would say. One did also reply with one mpg savings
When you starting signing your posts with name, year, model and serial number, I will unmoderate you.

Herb

Forum Moderator

Re: Country Coach engine fan modulator

Reply #8 –
Yahoo Message Number: 61863
Herb,

I was about to post the same difference in cost results which you came up with. I think there would also be savings in the wear and tear on the fan motor by having it cycle as it should.

Ray

2000 Intrigue 11040

Re: Country Coach engine fan modulator

Reply #9 –
Yahoo Message Number: 61866
This is an interesting subject. What speed, if you don't mind saying, do you typically drive?

Mike

06 Inspire 51784

Re: Country Coach engine fan modulator

Reply #10 –
Yahoo Message Number: 61879
Had my Fan Controller replaced last week on my 05 Allure with the Cummins 400 ISL. Both Coolant & Transmission Temperatures would be around 180, now with the New Fan controller, coolant is 200 and the transmission is 210 which I understand is now normal operating temperatures. Problem now is the transmission temperature claims 237 in stop & go traffic (15 minutes 5 miles) requiring me to shift to neutral to keep temperature lower. Outside temperature in the low 80's coolant at 210. The RV dealer who installed the Fan Controller stated that it had to be re wired? Question: Is the problem the fan controller wiring or a bad controller? It seems that the fan controller is not going into high-speed. Currently traveling East and 800 miles from the RV dealer.
John Tanzi

05 Allure #32281

Re: Country Coach engine fan modulator

Reply #11 –
Yahoo Message Number: 61898

John,

Idling in traffic is one of the biggest heat loads on trans/fluid, the converter is slipping which produces heat and not moving the lube doesn't get circulated through the cooler and transmission as efficiently as at speed; plus loss of efficiency standing still - less air movement over everything.
There are some mechanical similarities between Allure and Inspires so the following might apply. There is apparently more than one temp sensor in the Allison trans and it has been posted here that CC selected, for some Inspire production, the one that will show the worst temps - and that this is not an accurate indication of problems. I believe the sump is the normal temp of concern and the one CC used is before anything gets cooled. The Allison is an electronic transmission and has lots of inputs most of which are no interest or concern to us. If this is accurate info CC just picked the inappropriate connection.
Our Inspire does exactly the same thing, when I get stuck in traffic I also put the trans in neutral, this releases the load on the converter and may raise the engine rpm which circulates the trans fluid better. I believe I also read here that you can go to an Allison dealer and have the temp sensor connection changed from what CC did to the one that more accurately shows what is actually the situation. Knowing the problem I just ignore the gauge. FWIW, my Silver Leaf PC based system shows normal (well, much lower) trans temps than the dash gauge when stuck in traffic as described. This is why I suspect the info is correct about CC using a different sensor. Bottom line is unless you really try I doubt there is a problem actually brewing. Using neutral is a good idea if the passengers can stand the slight clunking noises. ;-)

Bob (rthandren@...)
'05 Inspire 51178

Re: Country Coach engine fan modulator

Reply #12 –
Yahoo Message Number: 61907
For what[/b]it's worth, my VMS shows the temp 10 to 15 degrees cooler than the analog gauge.

George

'04 Inspire 51061

Re: Country Coach engine fan modulator

Reply #13 –
Yahoo Message Number: 61913
John, the fan controller replacement requires no re-wiring. It is plug and play.
By the way......I don't think those temperatures are too bad in stop and go traffic. The transmission will always go up dramatically in those conditions. In the absence of some other data point I would not worry about what you are seeing.

George in Birmingham(Now in Taos)
'04 Allure 31038
George in Birmingham
2003 Magna 6298