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Old 11-06-2022, 12:12 PM   #1
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House disconnect relay / solenoid - location and repair

Can someone point me to the location of the house disconnect relay / solinoid? I assume this is a rotary switch rather then a current solinoid. Is that corrent?

Mine is becoming intermittant. Has anyone repaired one? It is a matter of dirty contacts?

(I have not taken the control panel off. It could also simply be a bad switch. That would actually be straight forward. )

Advice, pointers, and pitfalls appreciated. - Dan
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Old 11-06-2022, 01:32 PM   #2
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Dan, not sure what NRV model you have. On our 2005 gas Dolphin, it's a relay located just forward of the entrance door.

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Old 11-06-2022, 01:39 PM   #3
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We need to know WHAT National RV you have.

Gas? Diesel? Model? Year?
Brett Wolfe
Ex: 2003 Alpine 38FDDS. Ex: 1997 Safari Sahara. Ex: 1993 Foretravel U240
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Old 11-06-2022, 04:30 PM   #4
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My oversight. Sorry.

2002 National Tradewinds 3970 LE. When it does work the click sounds like it coming from the battery area. However all I can recognize there is the main battery controller board.
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Old 11-06-2022, 04:41 PM   #5
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I found a pdf label "12V Power Distribution Center". This appears to have both the charging interconnect relay and the chassis connect / disconnect relays. I suspect it is associated. There are two boards, it is likely on the second board. I will check and follow up.

Thanks all.
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Old 11-07-2022, 12:26 AM   #6
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Location: Horse Town USA, CA.
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Probably the switch needs to be replaced. The one in my Dolphin does the same thing and it is the switch.
1999 35 ft. Dolphin 5350, F53, Banks System, 5 Stars Tune, Air Lift Air Bags, Koni Shocks, Blue OX TruCenter, TigerTrak track bars F&R, Roadmaster 1-3/4" rear auxiliary sway bar, 2004 F450 Lariat Pickup 6.0 Diesel Crew Cab DRW, 4X4, GVWR 15,000, Front GAWR 6,000, Rear GAWR 11,000, GCWR 26,000,1994 36ft Avion 5er, GVWR 13,700, 2,740 Pin Weight.
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Old 11-07-2022, 05:24 AM   #7
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National RV Owners Club
Mid Atlantic Campers
Spartan Chassis
Join Date: May 2016
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I have an 03 Tradewinds. The solenoid on mine is in the bay with the inverter. Their is a pc board with a number of breakers on it. The solenoid is located behind the front board. Mine often won't engage when I hit the switch, but if I hit it a few more times it clicks in. Hope this helps.
Chasing The Sun...
Ray & Pat McCaskey
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Old 11-15-2022, 06:12 PM   #8
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I have a 1998 Sea Breeze and mine is mounted behind the BCC board if that helps.
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Old 11-16-2022, 09:26 AM   #9
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On my 02 it is on the front wall of the inverter bay. The solenoid is behind the BCC circuit board out of sight. I got a replacement from O'Reilly about 3 years ago for $40.
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air, cat, disconnect, location, relay, repair, solenoid

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