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tkcas01

Roaming Fulltimer

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Joined: 10/11/2005

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Posted: 08/08/12 02:57pm

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Was having some DC issues and when I checked my battery disconnect switch I was surprised to find the knob at an odd angle. Pretty sure this has not always been like this. The knob is not loose and turns fine, it just is very flaky as to when it actually makes contact. It almost seems like the "innards" of the switch have melted, corroded or something to push the knob askew like that. I guess this weekend I can take it apart and investigate.

Any thoughts? For reference the 3rd photo is the chassis disconnect switch which is fine and I am sure they both used to look like that...

My last known location (is here)

wolfe10

Texas

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Posted: 08/08/12 03:39pm

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Quite likely it has been distorted by HEAT. Could be from loose or dirty connection or could be from pitted points in the switch itself.

I would replace it ASAP. It would not take getting much hotter to start a fire.

Brett Wolfe
1997 Safari Sahara 3540
EX: 1993 Foretravel 36' U-240

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pianotuna

Regina, SK, Canada

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Posted: 08/08/12 03:42pm

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Hi,

Tear it open for fun. Replace ASAP.

Is it a straight "on off" type?

Regards, Don
Kustom Koach Class C 28'5" 256 watts Unisolar, 875 amp hours in two battery banks 12 volt batteries, 2500 MSW watt inverter.

tkcas01

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Posted: 08/08/12 04:01pm

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pianotuna wrote:

Hi,

Tear it open for fun. Replace ASAP.

Is it a straight "on off" type?

not sure I understand the question, but the "good" switch does indeed have just two positions. This one, however, will rotate around and around.

I think you are right - this needs to be replaced ASAP. Just curious if there is an issue somewhere else that caused this or if it is just a defective switch.

mlts22

Austin, Texas

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Posted: 08/08/12 04:05pm

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What comes to mind is a defective contact on the switch causing the heat issues. Replacing it, and ensuring that it is well mounted should be the end of this problem.

smkettner

Southern California

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Posted: 08/08/12 04:06pm

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When you open it inspect for any indication of poor connection such as corrosion, dirt, less than positive engagement of the contacts. Otherwise keep an eye on the new switch.

2001 F150 SuperCrew
2006 Keystone Springdale 249FWBHLS
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tkcas01

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Posted: 08/08/12 04:17pm

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OK, found a replacement - Marinco 701HBRV House Battery Switch.

If I find anything interesting during autopsy I will post it back.

wa8yxm

Wherever I happen to park

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Posted: 08/08/12 08:50pm

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wolfe10 wrote:

X whatever, Dirty contacts or connections have caused it to overheat, REPLACE ASAP.

Nothin adds excitment like something that is none of your business
Kenwood TS-2000 housed in a 2005 Damon Intruder 377

pianotuna

Regina, SK, Canada

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Posted: 08/08/12 08:53pm

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Hi,

Sometimes similar switches are used for battery selection--for example I have two battery banks. I could have a switch that had four positions. A, B, A+B and off. The same thing can be accomplished by having two simple "on/off" switches--which is what I chose to do.