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Old 06-07-2017, 09:38 PM   #15
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Originally Posted by bluepill View Post
Let's not forget that the dash A/C helps to defog the windshield in damp weather. I have been in a few situations where I would not have been able to continue driving without it.

Wow that's great advice because I'm getting ready to make my first cross country trip (third time driving this rv or driving anything bigger than my 18 ft truck) I couldn't imagine the big ass windshields getting foggy I'd flip out
2005 national sea breeze lx class a
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Old 06-07-2017, 09:39 PM   #16
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I have found that the dash AC is a big plus in our coach. Running just the coach AC does not adequately cool the driver. I have to have an extra fan pushing the cool air forward. I suffered through this for a few months till I fixed the dash AC. Now much better and when the big window fogs up having the AC and the top fans help clear it up. I am sure it affects mpg slightly but wind and hills make a much larger impact on mpg. Neither of which can be controlled.
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Old 06-07-2017, 09:49 PM   #17
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I have a gas 8.1 34 ft we run the dash air most times unless the temperature is in the mid 80s and above we install a curtain across the front behind the the drive seat and use a small 9 volt fan it works great and my gas averages 7.5
Larry and Sheila 2004 Sea Breeze 8321 Lx
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Old 06-07-2017, 09:57 PM   #18
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I run the dash air, then turn on the gen and run the roof heat pumps if needed. If I was worried about a mpg or two I wouldn't have a MH!
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
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Old 06-07-2017, 10:24 PM   #19
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I believe the salesman is trying to make you believe that because the AC is not working it's not worth it. I run my dash air all the time. If it gets hot I start the genny and one AC if necessary the 2nd AC. In any event I run the rear AC to cool down the heat in the bedroom.
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2016 London Aire 4519, Freightliner chassis, Cummins ISX, 2018 Jeep Wrangler Unlimited, Blue Ox Avail with AF1. TST 507 TPMS
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Old 06-08-2017, 12:32 PM   #20
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Originally Posted by CJ7365 View Post
I would ask that salesman, to show you some literature stating what he said. He will NOT be able to do that.

Maybe he read this:

Or this:

Or this:

Or this:

Or maybe he read the Cummins literature on improving fuel economy which also discusses the a/c system.

Just having some fun with you. I agree that it sounds like he was making an excuse for the system not working. As far as removing the belt, that's just ridiculous, they installed it for a reason.

As for us, we travel down the road with both the dash and all three a/c's running.
Brian and Tammy
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