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M450 (Unique Issues) If you have a unique issue with your M450 model coach and it can't be answered in one of the other forums here, then this is where you can list it.....list your M450 Parts here too. NO DISCUSSION OF ANY OF THE M450 LAWSUITS ALLOWED HERE.

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  #1  
Old 08-20-2013
Doubledoc Doubledoc is offline
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Join Date: Jul 2009
Location: Bend
Posts: 186
Default Roof AC's quite.

I was running all 4 roof ACs on the generator for 4hours or so, when a hud occurred and all ACs shutdown. The dash AC switches did not work. Very soon after the #3AC (bathroom) came on even though the dash switch was off. I shut #3 down at the panel breaker and started a look for problems with no good result. I was told to check the switch relays in the Bedroom left back wall. That was good advice. I found two fuses on the very bottom (one 5 amp and a 3 amp)
. The 3 amp was blown so I replaced with a 5 amp(only small one available at the time). The #1,2,4 ACs came on. When I turned #3 on ,all shotdown. The #3 had breaker off. I then turned off all ACs at dash and turned the breaker on for #3. It came on. I turned #3 off at breaker
. We used the remaining ACs the rest of trip. Something is probably blown in the control curciut for #3-maybe a relay?

Thoughts?
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Jim Colby
Bend, Oregon
'06 450LXI
"Dream Catcher"
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  #2  
Old 08-20-2013
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Hotvenm Hotvenm is offline
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Join Date: Jan 2008
Location: Lake City, Florida
Posts: 77
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Jim,

I just ordered some relays from this web site: http://www.newark.com
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Garland Kirby
Lake City, FL
2006 LXI 450
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  #3  
Old 08-20-2013
dentmac dentmac is offline
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Join Date: May 2008
Location: Wiarton,Ontario
Posts: 472
Default

Also available from http://ca.mouser.com/ about $4.50 each My bracket on the bus bar was also cracked

Here is the part number
No. Mouser Part No.
Customer Part No.
Manufacturer Part No.
Description Quantity Ordered Quantity Shipped
1
RoHS: Compliant1
528-464
MFG Part No:70-464-1
70-464-1
Magnecraft / Schneider Electric Relay Sockets & Hardware
US HTS:8536694050 ECCN:EAR99 COO:CN 1 1
2
RoHS: Compliant1
528-750XBXH12D
MFG Part No:750XBXH12D
750XBXH12D
Magnecraft / Schneider Electric General Purpose Relays
US HTS:8536490080 ECCN:EAR99 COO:CN 1 1
1RoHS: Compliant
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Ross MacKillop
2006 450 LXi
Wiarton Ontario.
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  #4  
Old 12-23-2013
Doubledoc Doubledoc is offline
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Join Date: Jul 2009
Location: Bend
Posts: 186
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A relay was found to have failed in the on position for AC #3. It was replaced. It was also found that about two inches of wire (solid copper) insulation was burned from the screw connector on back. The connection had worked loose due to vibration. The code says that only braded wire should be used with the screw connectors on moving vehicles so that a firm connection can be made which will not back off with vibration. The solid wire to screw connection works OK in home use.
The remaining screws were all tightened for all AC units and a drop of locktite was added to screw top.

You may want to check all those screw connections in the back bedroom panel.
BESURE to have all AC power turned off before tightening.
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'06 450LXI
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