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07-16-2017, 11:18 PM
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#1
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Junior Member
Join Date: Jul 2017
Posts: 15
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New Member Class A
Hello RV community, I am Izzy new to RV. My first trip will be in a few days to Lake George for a week. Happy to be here. I have an issue with my 2000 Coachman class A. My Driving AC is not coming out from the vents , only from the front windshield. Any suggestions. Thanks
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07-16-2017, 11:24 PM
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#2
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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 from WA State!
Sounds like the vacuum controlled diverter valve isn't working.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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07-16-2017, 11:31 PM
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#3
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Junior Member
Join Date: Jul 2017
Posts: 15
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Big job? Should I get it service. Or could I get the part at any local dealer.
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07-16-2017, 11:41 PM
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#4
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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First ypu need to figure out what part is causing the problem, then if it can be fixed or needs replacing. Could even be as simple as pushing a vacuum hose back into place.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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07-16-2017, 11:42 PM
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#5
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Junior Member
Join Date: Jul 2017
Posts: 15
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Great, will check it out tomorrow. Thanks
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07-17-2017, 08:56 AM
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#6
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Registered User
Ford Super Duty Owner
Join Date: Nov 2014
Location: NW Ohio
Posts: 7,114
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I suspect you have a vacuum leak. The systems are designed so if they fail, they fail in the defroster mode.
On my old Mirada, the vacuum hose came off of the accumulator under the hood, above the heater box. You can read about it here:
Heater A/C blows Defrost mode, regardless of switch setting – 2001 Coachmen Mirada 300QB
ALSO - Another common failure point is the square looking accumulator that's mounted on the chassis rail directly in front of the passenger front tire. It gets a lot of spray and stuff that gets kicked up from the tire and can break and even pull the hoses out of the accumulator.
And of course the hoses are known to break where they come out of the control head and go to the heater box inside the and around the passenger compartment
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07-17-2017, 04:14 PM
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#7
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Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 54,794
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Hi !  Welcome to IRV2! We're sure glad you joined the gang! 
Keep her between the ditches!
Good luck, happy trails, and God bless!  
__________________
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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07-17-2017, 07:35 PM
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#8
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Junior Member
Join Date: Jul 2017
Posts: 15
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Thanks guys, It was a vacuum hoses detach near the front right tire. Very happy . Thanks again RV family .
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