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Old 05-03-2021, 12:33 PM   #1
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Flyer15015's Avatar
Join Date: Jun 2016
Location: On the continental divide
Posts: 484
Cooling fan question

So, we have just returned from our first long haul trip from Colorado to Florida and back, a total of 4200 miles including a stop in Davenport, Iowa, in our "new to us" 2004 Pace Arrow 37C, pulling a Dodge minivan on a dolly.

As per our signature I did install the Ultra RV TCM and ECM units, and new Bilsteins prior to the trip. I'm happy with the performance of the coach, in that as hard as I tried to keep her at 62 - 65, she likes to creep up to 70, and seems to be quite comfortable at that speed. I don't.

On long pulls and brisk head winds coming across Texas, I hear the engine fan roaring quite a bit, and it does not take much for her to downshift. When she does, I immediately lift off the gas and try to keep the revs below 3K. This results in a speed drop to 55, and I have to wait for the next downgrade to get her back up to 60+ and in 5th gear.

So, my question is, there are 2 "pancake" fans in front of the air conditioning coils. What turns them on ? AND is it possible to put an indicating light on the dash to tell me when they are running, AND has anyone ever wired them up to a switch on the dash to control them manually.
This would seem to be a benefit in high heat / load / traffic conditions.
And maybe cut down on the engine fan roaring at the slightest sign of a hill.

Anybody traveled this road before ? I would welcome your ideas.

Mike in Colorado
2004 Fleetwood Pace Arrow 37c,(Jezebel) Ultra RV ECM / TCM, Bilstein's, Sailun's & Sumo's all round, pushed by a 2014 Chrysler T&C.
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Old 05-03-2021, 12:45 PM   #2
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Join Date: Nov 2002
Location: OH
Posts: 736
Generally speakin and a multimeter will tell you or just observations. When you turn the AC compressor on you will see those fans turn on. Yes you can parallel the control switch to manually turn em on when not using the AC.

Better bet may be to implement an electric fan that is switch controlled instead of mucking with the AC system.

RUSTIC is good.
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cooling, fan

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