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04-20-2019, 03:05 PM
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#1
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Senior Member
Join Date: Aug 2016
Posts: 3,400
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What is this for
See coach info in our signature.
Is it ok to block this area to stop cold draft coming in?
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04-20-2019, 03:22 PM
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#2
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Senior Member
Join Date: Dec 2017
Posts: 1,251
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More than likely it is the fan intake for the air-conditioner and the heater. Take a piece of toilet paper or tissue and lay it against the vent then turn on the blower fan on the dash and see if it sucks to it.
I had a Lowe’s plastic bag get sucked against mine in my pick up truck and lost our AC thankfully it was an easy fix.
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Rick Goodrum
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04-20-2019, 03:31 PM
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#3
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Senior Member
Join Date: Jul 2018
Posts: 3,165
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x's 2 furnace or A/C return air. I'm betting furnace.
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2011 Keystone Sprinter 323 BHS. Port Charlotte Fl/Hinsdale MA. Retired Master Electrician. All Motor homes are RV's. All RV's are not Motor homes.
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04-20-2019, 03:39 PM
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#4
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Senior Member
Join Date: Dec 2003
Location: Motor City, Mich
Posts: 3,369
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Dash HVAC recirc air inlet, yes.
May not be opening and closing correctly. On my Winnebago with SCS Frigette HVAC, the vacuum can that operated the recirc door failed. It is exposed to splash from the right front wheel, and is mounted is such a way that it collects water inside it. If yours has failed, the door may be stuck partially open letting outside air directly into the interior.
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Tim.
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04-20-2019, 03:53 PM
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#5
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Senior Member
Join Date: Jun 2012
Location: NorCal
Posts: 3,000
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Looks like fresh air intake for aqua hot or discharge air.
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Outbound
2002 Monaco Executive 500 ISM
2004 GMC 2500HD 4X4
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04-20-2019, 04:24 PM
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#6
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Senior Member
Join Date: Aug 2016
Posts: 3,400
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Quote:
Originally Posted by tderonne
Dash HVAC recirc air inlet, yes.
May not be opening and closing correctly. On my Winnebago with SCS Frigette HVAC, the vacuum can that operated the recirc door failed. It is exposed to splash from the right front wheel, and is mounted is such a way that it collects water inside it. If yours has failed, the door may be stuck partially open letting outside air directly into the interior.
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Hey Tim,
My dash air and heat work fine but.......
I'll check to see if that door is opening and closing or in other words working properly. But I've just taken a closer look at this and the way our coach is, there's no way any water could get up into this area. Front, top and rear wheel wells are totally enclosed so no water could find it's way up further to where this unit is mounted on the top back of the firewall, in the engine bay and accessed by opening the hood. But...I went online to find some diagrams based on what you said and I do see these "vacuum coils" you mentioned. I don't think my actual unit is listed in this PDF because mine says Evans on the outside of the box when I looked under the hood and this PDF only covers Winniebago 2003 thru 2009. But these diagrams and parts list make clear what's going on in there.
See attached PDF.
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04-20-2019, 04:51 PM
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#7
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Senior Member
Join Date: Jul 2010
Posts: 5,336
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One thing to check is before you turn off the engine, make sure the dash AC is on recirculate to close off the outside air vent. Do not block of any furnace vents or returns.
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Tom
2016 Newmar Bay Star Sport 3004
2021 Jeep Gladiator Sport Willys
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04-20-2019, 05:06 PM
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#8
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Senior Member
Join Date: Aug 2016
Posts: 3,400
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Quote:
Originally Posted by wildtoad
One thing to check is before you turn off the engine, make sure the dash AC is on recirculate to close off the outside air vent. Do not block of any furnace vents or returns.
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Well....not sure what you mean by this but my dash controls do not have a recirculate setting.
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04-20-2019, 05:35 PM
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#9
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Member
Join Date: Jun 2018
Location: Bolingbroke, Ga
Posts: 76
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Max air usually closes outside input and recirculates.
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Jim
99 Endeavor Diesel
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04-28-2019, 02:17 PM
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#10
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Senior Member
Join Date: Jul 2010
Posts: 452
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From the picture of your a/c-heat control. you have the Evans Tempcon. Go to their website to get information and drawings.
Evans Tempcon Michigan, LLC > Home
__________________
2004 DutchStar DSDP3812, Cummins ISL 370Hp, Spartan MM Chassis, 2020 Buick Envision Supreme toad, Blue Ox Aladdin Tow Bar, FMCA #F451747 
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04-28-2019, 02:33 PM
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#11
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Junior Member
Join Date: Apr 2019
Posts: 2
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Are Bigfoot Hydrulic Cylinders rebuildable
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04-28-2019, 05:07 PM
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#12
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Senior Member
Join Date: Feb 2008
Posts: 265
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Quote:
Originally Posted by Jreeves2
Max air usually closes outside input and recirculates.
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Spot on!
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04-29-2019, 11:46 AM
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#13
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Junior Member
Join Date: Apr 2019
Posts: 2
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Quote:
Originally Posted by Joegort
Are Bigfoot Hydrulic Cylinders rebuildable
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I need to replace the tires on my RV. I’m thinking about Michelin any ideas.
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