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Old 07-13-2014, 10:48 AM   #1
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Join Date: Feb 2014
Location: Tustin,CA
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Hot Cab/ Kool Kab

Earlier this year I bought a 2001 Minnie 31C on a Ford chassie with an E450 V-10 engine. The RV has low mileage, 31,000 mi, and I have had extensive preventative maintenance performed to include brakes, trans flush, coolant flush, belts, oil etc. It runs well runs but the cab seating area on the passenger side is very hot and uncomfortable. Ford garage says the A/C and heater controls are performing correctly. They noted a piece of loose insulation on the driver's side firewall that they fixed. The area around the AM/FM radio and the footwell get hot to the touch. It is really uncomfortable especially in hot weather. In hot weather the A/C will not keep up with the heat. I will be traveling from CA to Minnesota later this summer. Also the dash gauges seem to register normal. Looking for some cool ideas to chill it out.

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Old 07-16-2014, 04:53 PM   #2
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You don't have a exhaust leak blowing hot air on the floor .

2007 Fleetwood Revolution LE 40V
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Old 07-16-2014, 05:54 PM   #3
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known issue with the V-10, right exhaust is under the floor and creates alot of heat. Pull the cover off to see where the heat comes from. You can try to apply a heat blanket to the inside of the cover and the underside of the floor. We had to just live with it.
Alan & Patty
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Old 07-18-2014, 08:46 AM   #4
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I would suggest you do something like suggested, put some extra insulation under the floor. See my post here where I put some sound dampening material to make my cab quieter, but it also has an insulating effect.
Operation "Super C Quiet Cab"

You can get different material that is specifically designed for insulation, moreso than the stuff I used is primarily for noise reduction. Principle is the same though, add some extra material under your floor carpet or mat.
2005 Kenworth Showhauler truck conversion.
. 44 ft, Cummins ISX15 450 hp, 10 speed, twin screw
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Old 07-18-2014, 12:57 PM   #5
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I have experience with step van type sales trucks with the motor doghouse protruding into the passenger area. Excess heat is always a problem. I have used a small 12v fan to blow hot are out of area, it will make the area around your feet a little cooler
15 Vegas with a red toad
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Old 07-18-2014, 01:36 PM   #6
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The class-A's are worse, trust me.
Don't expect the vehicle AC to keep up on a 31' vehicle in any sort of hot climate. Expect to run the generator.

If you don't have insulation on the doghouse, you'll need to get it. In my class-A, I actually started by insulating the floor (on the outside) using a product that sticks-on called Thermo-Tec. You can buy it at Jegs. Dynamat makes something simliar (it costs more).

You start by insulating everything between that motor and the cab.

I've got an 05 Class-C now and it's actually reasonably cool. The doghouse does build up some heat, but it's the same design as your 01, likely just better insulated.
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Old 07-18-2014, 02:56 PM   #7
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I used the Thermo-Tek - Amazon.com: Thermo-Tec 14620 60" X 36" Heat and Sound Suppressor: Automotive -

Good stuff! If you spray 3M 99 Spray adhesive on both sides prior to gluing in place the stuff sticks like crazy. All tight bends and radius's adhere permanently. Much better than the peel and stick alone.

The stuff reduced the heat by 30 degrees and the noise by 70 percent. Even with my naked doghouse it is barely warm to the touch. With the engine idling before I could count the valve taps now I cant hear it

Here are pics of mine and one of my custom under dash
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