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09-23-2014, 12:13 PM
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#1
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Member
Winnebago Owners Club
Join Date: Apr 2012
Location: Tacoma, WA
Posts: 74
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AC quit W24
Sorry if this is a redundant issue, but I could not find anything here.
This is our first Motorhome, a 2006 Itasca Suncruiser 38T (W24 chassis). The AC has quit working while traveling, and the fan (AC & Heat) quits blowing when we drive up hill.
Is this a problem other have had and solved?
Thanks for your help.
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Bob & Muriel Tacoma, WA 2006 Suncruiser 38T, W24, 8.1, Henderson front, Ultra-Trac Rear, Koni, Banks Power, 2008 Saturn Aura Toad w/SMI & Falcon All Terrain
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09-23-2014, 12:25 PM
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#2
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Senior Member
Winnebago Owners Club
Join Date: Sep 2007
Location: Ann Arbor Michigan
Posts: 792
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Does the basement air work while plugged in to shore power or when on generator?
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2005 Suncruiser Banks Powerpack
Chocolate lab (Buster) 2007 Jeep Wrangler
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09-23-2014, 01:38 PM
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#3
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Senior Member
Workhorse Chassis Owner
Join Date: May 2009
Location: Kansas City, MO./Pollock, LA.
Posts: 1,556
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More info please.
Are you talking about your roof air or dash air.
Does it come on going down hill?
__________________
06 Hurricane 34FT WH W20 Chassis 8.1L 132K, Steersafe, Koni Shocks, DIY Trac Bar, Tri-Metric 2025RV Battery Monitor, 4-6V Batteries, Scan Gauge 2, Crossfires, 735W Solar Morningstar MPPT-60, WG T4 In-Motion Sat, XM Radio, 07 Chevy Malibu Maxx Toad, Falcon 2, Brake Buddy, Escapee
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09-23-2014, 02:14 PM
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#4
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Member
Winnebago Owners Club
Join Date: Apr 2012
Location: Tacoma, WA
Posts: 74
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Thanks for the reply(s) Coderbill and mgscott.
I am talking about the dash air from the engine.
Our house AC is from the heat pump in the basement.
We experienced the AC problem on our way home. I don't know if the AC in the basement works, but I will give it a try when I get a chance.....are the two systems tied together somehow?
The fan comes back on when we are driving level or down hill....but it does not blow cold.
__________________
Bob & Muriel Tacoma, WA 2006 Suncruiser 38T, W24, 8.1, Henderson front, Ultra-Trac Rear, Koni, Banks Power, 2008 Saturn Aura Toad w/SMI & Falcon All Terrain
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09-23-2014, 03:15 PM
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#5
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Senior Member
Join Date: Jul 2012
Posts: 1,450
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If I understand correctly, it may be a vacuum issue. The first thing I would check is under the hood. There should be a black plastic sphere approx. the size of a baseball attached to the firewall. Check vacuum hose connection on bottom of plastic ball.
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George R. - Fulltiming since January '03
2007 Newmar Mountain Aire 3991
2012 Chevy Malibu LT1
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09-23-2014, 09:21 PM
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#6
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Senior Member
Winnebago Owners Club
Join Date: Sep 2007
Location: Ann Arbor Michigan
Posts: 792
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The dash air and basement air/heat pump are twp separate systems and not tied together. The only time I will run the dash air is when I might be starting the coach on a journey. I like to run the generator on hot days to keep the coach cool on the trips. It typically uses less fuel (the generator) than the engine driven AC. That however does not answer your question but if the dash air does not work try running the coach basement air on generator until the source of the problem on the engine AC can be trouble diagnosed..
__________________
2005 Suncruiser Banks Powerpack
Chocolate lab (Buster) 2007 Jeep Wrangler
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09-24-2014, 03:16 AM
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#7
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Member
Winnebago Owners Club
Join Date: Apr 2012
Location: Tacoma, WA
Posts: 74
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Thank you gruelens and codgerbill.
I'll check the vacuum hose when I get to the coach next time....( don't have room to store it at home).
I would not have expected that the generator + the house AC would be more efficient to run than the engine AC.....thanks for that tip!
__________________
Bob & Muriel Tacoma, WA 2006 Suncruiser 38T, W24, 8.1, Henderson front, Ultra-Trac Rear, Koni, Banks Power, 2008 Saturn Aura Toad w/SMI & Falcon All Terrain
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09-24-2014, 08:03 AM
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#8
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Senior Member
Winnebago Owners Club Pond Piggies Club Appalachian Campers Mid Atlantic Campers
Join Date: Dec 2002
Location: Sarver, PA/Crystal River, FL/Shelocta, PA
Posts: 4,671
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Here is the vacuum hose diagram.
-Tom
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Sarver, PA/Crystal River, FL/Shelocta, PA · FMCA 335149 · W3TLN 2005 Suncruiser 38R · W24, no chassis mods needed · 2013 Honda Accord EX-L · 2008 Honda Odyssey EX-L
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09-30-2014, 08:42 PM
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#9
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Member
Join Date: Sep 2013
Location: Labrador City, NL, Canada
Posts: 51
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It sounds very much like the problem I had with my 2005 Suncruiser 38J. The fan and A/C worked intermittently for a period but then finally stopped working all together. A Workhorse authorized service centre was not able to find the problem. So I went back to my dealer and their service department spent 8 hours working on it. The cause turned out to be not one but two wires chaffed through in the wire harness where it crosses the driver's side of the radiator. If the vacuum turns out not to be the cause check out the wiring. Good Luck.
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09-30-2014, 09:01 PM
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#10
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Senior Member
Join Date: Jan 2011
Location: Pensacola, FL
Posts: 2,457
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Quote:
Originally Posted by gruelens
If I understand correctly, it may be a vacuum issue. The first thing I would check is under the hood. There should be a black plastic sphere approx. the size of a baseball attached to the firewall. Check vacuum hose connection on bottom of plastic ball.
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To expand on the possible vacuum problem. On gasoline powered vehicles, vacuum is produced in the engine's intake manifold. This is because the engine is basically a big pump (sucks in air and fuel). At idle, with the throttle closed, maximum vacuum is produced. Think of covering a vacuum cleaner hose inlet. As the throttle is opened more, the airflow increases and the vacuum decreases. At high throttle openings (such as going up a hill), the vacuum is quite low, and is below the amount needed to properly operate the controls and actuators on systems (such as heater controls) that make use of vacuum. There is usually a reservoir (Black sphere as mentioned in the quoted post above) that maintains vacuum in the system during times of low vacuum supply. It also has a one way check valve to keep the vacuum from "going backwards" back into the engine. If the reservoir or check valve are leaking, OR if any of the hoses, controls, or actuators leak, vacuum will be lost when the throttle is opened wide. This may produce the symptoms you mention.
A simple vacuum gauge tool is an easy way to test for function and leaks.
Example: http://www.amazon.com/Wilmar-W80594-...vacuum+testers
In response to the post about wire damage, be aware that rodents have been know to feast on wire insulation, causing all sorts of electrical problems. Keep your eyes open for any signs of insulation damage or nesting material in the area of the heater box/controls/wiring.
__________________
2008 Itasca 37H
2011 & 2012 Len & Pat's "One lap of America"
27K miles & 41 states in 13 months
Yellowstone Lake 6-1-2012
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