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Sour Danfoss fan controller

Yahoo Message Number: 106962
My fan controller finally died. I know if I unplug it fan will run on high speed. Does anyone know if I connect a switch to the fuse can I manually control it until I get somewhere to replace it with a wax valve?

Thanks
Ray Down

06 Inspire 51602

Re: Sour Danfoss fan controller

Reply #1 –
Yahoo Message Number: 106963
Chris Snyder while he was in Tucson had a couple of owners he serviced install switches that way, I did it temporarily until Eric good get a wax valve controller for me. Its been over 2 years with the wax valve and I'm glad I don't I have to worry issue. TWI 2004 Intrigue 11731

Re: Sour Danfoss fan controller

Reply #3 –
Yahoo Message Number: 106965
Ray,

I installed a Danfoss controller bi-pass switch on my 05 Inspire two years ago.
It's quite easy and works great. It allows my to default my fan to high speed whenever I want, such as climbing a long steep mountain grade.
In the outside compartment under the drivers seat you will find a fuse box for the chassis controls. look for a fuse wire tagged fan controller, I think its #73 or #74.
All you have to do is cut the wire coming from the fuse and install a loop circuit up to your drivers left control panel. I had a blank in the panel where I installed an on/off rocker switch that I got from Radio Shack. The switch lights up when I'm bi-passing the controller making it easy to monitor.
Hope this helps. Good Luck!
RJ 2005 Inspire #51264

Re: Sour Danfoss fan controller

Reply #4 –
Yahoo Message Number: 106966
Yes, I've running mine this way since replacing the controller four years ago. One, it's better safe than sorry and two it's great for a little extra cooling on long slow climbs.

Re: Sour Danfoss fan controller

Reply #5 –
Yahoo Message Number: 106969
Many thanks to all that replied.

I have installed a switch and plugged the danfoss back in, at idle it stays in high no matter what position switch is in, hopefully it will go back to low speed once the engine warms up.

Re: Sour Danfoss fan controller

Reply #6 –
Yahoo Message Number: 106970
No need to take it off high speed won't hurt a thing I ran mine for 6 months that way

Re: Sour Danfoss fan controller

Reply #7 –
Yahoo Message Number: 106971
just remember this, if you have your system operating the way it's supposed to, you won't overheat! other than that, you're putting a Band-Aid on the real problem! When you're overheating it's either a bad radiator probably aluminum or fan speed controller or a fan motor from the time I own my coach the first three years I had all three of these problems overheating the main culprit once I resolve the issues the coach runs at 185 and possibly 200 on a steep hill

Re: Sour Danfoss fan controller

Reply #8 –
Yahoo Message Number: 106973
When the controller died we were going up a long hill and overheated because it was on low speed. When I unplugged it went to high speed and no more problems. Ran at 185 from then on. I did not know if it was bad to run on high all the time. Will be in western Wa in a month so plan on getting it replaced at that time.

Ray Down

2006 Inspire 51602

Re: Sour Danfoss fan controller

Reply #9 –
Yahoo Message Number: 106974
The last time mine went out, and I cleaned the connections added some dyslectic grease and am going on 3 years. I clean it once a year as part of my maintenance.

Dan 2006 Allure 31348         
Dan

Re: Sour Danfoss fan controller

Reply #10 –
Yahoo Message Number: 106975
Cleaned the plug connections, dielectric grease and working great for me to:-)

/Mike

2005 CC Magna Matisse C13, #6501

Re: Sour Danfoss fan controller

Reply #11 –
Yahoo Message Number: 106982
Cummins in Eugene Oregon has a mechanical controller and lots of experience installing them these units are almost identical to the Monico units. Eugene and Junction City are the best place for getting work done on your country coach after all it is their home also recommend Oregon coach Jim Cooley

Re: Sour Danfoss fan controller

Reply #12 –
Yahoo Message Number: 106983
I don't know if I have a fan controller problem or not, but when I'm climbing long grades or mountains my engine starts to heat up. I have to shift down into second or first gear in order to control it. The red light comes on at about 205 deg. Which seems a little soon for overheating. t The Silverleaf hasn't given any warning as of yet. IT normally runs at around 180 deg. The engine seems to have plenty if power even at the higher gears. My engine is a Cummins 400isl.

glen coulter
2003 intrigue

On Monday, July 4, 2016 8:13 AM, "brian morrow bhmmorrow@... [Country-Coach-Owners]"  wrote:

Cummins in Eugene Oregon has a mechanical controller and lots of experience installing them these units are almost identical to the Monico units. Eugene and Junction City are the best place for getting work done on your country coach after all it is their home also recommend Oregon coach Jim Cooley

Re: Sour Danfoss fan controller

Reply #13 –
Yahoo Message Number: 106984
If you have a $400 ISL you will heat up to about 205 on steep grades and that's normal I do suggest dropping in lower gears to keep the RPM up in the lower 2000 RPM ranges with an ISL 400 you just have to be patient on a hill keep your RPM up and wait it out the electronic fan controllers are a piece of junk so I would suggest a monocle style mechanical that goes into the radiator and read everything mechanically they work much better

Re: Sour Danfoss fan controller

Reply #14 –
Yahoo Message Number: 106985
My Sour Danfoss failed 3 years ago while driving from San Diego to Tucson. The fuse for it was in the panel in the compartment under the driver. On my coach, it was wire #84. I chased it to connector DC-3 located under the transmission controller and added a switch in series which I mounted on the dash. Turning the switch off forced the fan on high. It was an easy temporary fix and I drove to NE Maryland manually controlling the fan as I did not want the fan on full speed the whole trip. (Note I was unable to get the replacement part for a month, so drove home with the manual control.) The switch is still in place and is left there in case of a future emergency.

Also note that there was no easy way to run the necessary pair of wires to the switch from the fuse panel to the dash. Wire #84 went to the controller via a connector under the transmission controller. Taping in there was easy.

Dennis

2003 Allure #30884

Re: Sour Danfoss fan controller

Reply #15 –
Yahoo Message Number: 106986
I installed a switch and drove 6,000 miles that way. It did work you must have the switch on the wrong fuse. I had a Laptop version of the silverleaf sitting on the tray on the dash. Had an alarm set to go off at 205 degrees when it went off I hit the switch and left it on till the engine hit 180.  I installed mine on the fused side of the fuse. Ran the wire up thru the heating duct and ran the fan manually until I had Kevin Waite and Brian Schack install a wax thermal unit.

Brian O'Day
2006 Inspire 360
Portland Oregon

From: Country-Coach-Owners@yahoogroups.com [mailto:Country-Coach-Owners@yahoogroups.com] Sent: Sunday, July 03, 2016 1:05 PM To: Country-Coach-Owners@yahoogroups.com Subject: [Country-Coach-Owners] Re: Sour Danfoss fan controller

Many thanks to all that replied.

I have installed a switch and plugged the danfoss back in, at idle it stays in high no matter what position switch is in, hopefully it will go back to low speed once the engine warms up.

Re: Sour Danfoss fan controller

Reply #17 –
Yahoo Message Number: 106996
You know I don't notice much difference in any event I get 7to8 miles to the gallon depending on the environment. I did however notice more power. The hydraulic fan motor takes a lot of energy when it's running full speed. Also, The fan motors are very expensive and can get a little dirty and the result is lower RPM and engine overheating. No one I know in the u.s. is capable of rebuilding these motors and cleaning them. If I remember correctly they are about $1,500 and take 3 months to get from England! in other words keep your hydraulic fluid clean! The mechanical fan controllers are very Superior and fast responding to the changing heating conditions of your engine. Cummins in Eugene Oregon installed mine and did a very good job. The older Monaco's used them as Standard equipment.

Re: Sour Danfoss fan controller

Reply #18 –
Yahoo Message Number: 106997
I also have an 03 Allure, I have a 370 ILS, I have a feeling my fan is not running properly.
The best MPG I have haver gotten was 6, and thats on the flat going from NC to Florida. If I go up grade, I need to run the generator for AC, as if I run coach AC I will over heat.
When I first bought the coach, a few years ago in November, I could not get the engine warm enough for heat, It always ran cold. Before I got into this matter, It kinda fixed itself ..
I guess I should look into the fan.

Bob

03 Allure, 3 Slide tag #30814

Re: Sour Danfoss fan controller

Reply #19 –
Yahoo Message Number: 107002
The short answer is no. However I haven’t driven that much since it was installed. The engine temp seems to stay constant at around 180. I have experienced more fan noise. With the wax valve the fan speeds up with the engine so it sounds more like a diesel truck than it did before. I can live with that as long as the engine stays that constantly cool.
 
Brian O’Day
2006 Inspire 360
Portland Oregon

Re: Sour Danfoss fan controller

Reply #20 –
Yahoo Message Number: 107004
Yes about .5 to 1 mpg. Sometimes even more. Even with the coach running 7 to 10 degrees cooler. TWI 2004 Intrigue 11731

Re: Sour Danfoss fan controller

Reply #21 –
Yahoo Message Number: 107006
I have chased an overheating problem for several years. In May, I solved the problem by having a thermo valve installed by Source Engineering in Coburg, OR. Works great!. I went south over Siskiyou Summit at a max temp of 194. It normally operates around 180. I would recommend one to solve overheating problems caused by the Sauer Danfoss valve.

Louie P

2004 Allure #31039 2014 Honda CRV

Re: Sour Danfoss fan controller

Reply #22 –
Yahoo Message Number: 107011
I went thru the unplug, clean the connectors, add dialectic grease phase. Did this two times, when I noticed usually fan module control activity.

For various reasons, I elected to have the Source Engineering Wax Valve solution installed while in Oregon. What I really like about this, is it's KISS. And it is infinitely variable, so the cooling fan only runs at the RPM required to maintain cooling. This directs more power to the wheels, where I like it.

Good quality components, professional install.

More MPG? Well I'd say yes - except I'm using the extra power for the wheels, so quite often it's a zero sum on MPG, but higher MPH while hill climbing.

Engine temps cooler? Well yes. But, I think this more from running Final Charge, after a good flush. That took place before the S.E. Wax Valve install. I usually run 185, today while traveling I90 into a heavy head wind in the mid 80's outside (These were sustained head winds, with rolling hills to some pretty good and long inclines.), with OTR AC running - the temp worked it's way up to 195-197 range.

Very pleased with the results.

Tip: If the current radiator hoses are old, and or thermostat - it's a great time to spend a few more bucks, and have them replaced at the same time as a Wax Valve KISS solution.

Best to all,

Smitty

04 Allure, 31017. ISL370 Cummins ECM programmed to ISL400. CAPS era engine.
04 Allure Sold to a nice new owner! Now enjoying a 07 Magna Rembrandt 45' ISX600 #6775
"We're ONDROAD for THEJRNY!" (Toad and Coach license plates, say Hi if you see us!)

Re: Sour Danfoss fan controller

Reply #23 –
Yahoo Message Number: 107012
While at the FMCA rally in Albany last week, I looked into the wax valve from Source Engineering and will be getting it installed sometime soon. Right now I don't have a problem but I know it will happen down the road, preventive maintenance.
Floyd 2006 Inspire 51744

Re: Sour Danfoss fan controller

Reply #24 –
Yahoo Message Number: 107013
Every time I read a thread about fan controller I wonder about mine.

I have the 425 HP ISL with the DPF. I have never been able to find the fan controller that many folks describe. Mine has what looks like a solenoid valve mounted to the fan motor. The guys at Cummins in Roanoke, VA said my fan was controlled by that valve and it got its 'instructions' from the engine ECM.

My fan starts at what seems to be high speed as soon as the engine is started. It seems to changed to an even higher speed if you turn on the dash AC. I have never run hot so I guess all is well but I've always wondered why the fan runs so fast on a cold engine at start up.

In 2014 the guys at CC said it was working as designed. I plan to ask the folks at OMC to confirm what I have when we get some service done there in October.

Gary

07 Allure 470 Siskiyou Summit, ISL 425