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Old 07-11-2019, 09:50 AM   #1
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Transfer Switch Gone Bad

Well 1500 miles from home and hooked up to shore power and all is good.
Then no shore power. Did the usual checking and found a loose wire in the Transfer Switch. Tightened and still no power into the coach. When I push in on the blue plastic located in the transfer switch 50 amp power is allowed into coach.
It appears something is wrong in the transfer switch. Called an RV repair in North Dakota said August. When I explained I was on vacation they asked me if I bought RV at there business and again told me August. Looks like I will use generator to keep batteries up for a few weeks unless someone has a trick to get shore power into coach.
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Old 07-11-2019, 09:57 AM   #2
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Buy a decent battery charger at an auto parts store and leave it connected to the batteries. Just keep an eye on them.
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Old 07-11-2019, 10:00 AM   #3
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ATS works when gen set is running ? But not for shore power ?
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Old 07-11-2019, 10:07 AM   #4
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Hi Tony - One or two things to look into if you haven't already. 1. You don't say which transfer switch you have but if it is one that also monitors the current be sure the issue isn't that the pole current is flawed. 2. you can bypass the transfer switch if you don't need the generator for the remainder of your trip. It's not difficult to change out the switch, just be careful and be sure that you also turn off the generator breakers.


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Old 07-11-2019, 10:09 AM   #5
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If you are handy, just buy a new transfer switch from someone like etrailer.com. They often burn up connectors if not periodically tightened. This is due to the vibration of being on the road - especially if not torqued properly when initially installed. Just don't over torque the new one. You are not putting on lug nuts.
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Old 07-11-2019, 10:10 AM   #6
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We have had automatic transfer switch catch on fire and had to rewire to have electrical service. You can by pass transfer box and just have shore power or just gen. but not both because that is what the automatic transfer box does. Go idea once a year to check all connections in box for tight connections.
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Old 07-11-2019, 10:22 AM   #7
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Quote:
Originally Posted by tom chelbana View Post
Good idea once a year to check all connections in box for tight connections.
I agree. This was something that I discovered on my prior coach when the shore cord was getting hot. I now add semi-annual checks to all of the 50 amp connections. Takes a couple of hours, but gives me piece of mind.
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Old 07-11-2019, 10:24 AM   #8
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Quote:
Originally Posted by 13charlie View Post
Well 1500 miles from home and hooked up to shore power and all is good.
Then no shore power. Did the usual checking and found a loose wire in the Transfer Switch. Tightened and still no power into the coach. When I push in on the blue plastic located in the transfer switch 50 amp power is allowed into coach.
It appears something is wrong in the transfer switch. Called an RV repair in North Dakota said August. When I explained I was on vacation they asked me if I bought RV at there business and again told me August. Looks like I will use generator to keep batteries up for a few weeks unless someone has a trick to get shore power into coach.

Do you have CoachNet or a similar product? If so, they will assist you in locating a service tech. You paid for the service, so let them do the hard work of burning up the phone lines on your behalf.
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Old 07-11-2019, 11:38 AM   #9
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Quote:
Originally Posted by Skip426 View Post
ATS works when gen set is running ? But not for shore power ?
Yes
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Old 07-11-2019, 11:51 AM   #10
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If you do purchase a new ATS, consider buying the exact same model. The wiring is very tight and the wires are large and stiff. It can be very easy to swap out the same model and very tedious to change to another model.

Speaking from experience....
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Old 07-11-2019, 11:53 AM   #11
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Originally Posted by 13charlie View Post
Yes

I'll stick my neck out here...


Transfer switches *generally* default to the generator. I think your relay/solenoid has made its final switch. Get the numbers off the old one and do an internet search for replacement(s).


If you post the part numbers (bonus for a picture or 2) it's likely someone here will have suggestions for a better quality replacement as well as procedural help in replacement.
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Old 07-11-2019, 12:00 PM   #12
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I thought of that! Well I found a replacement, different brand in Billings Montana. Found a Mobil RV Mechanic and going to meet him Monday and he is going to install. The ATS is a different brand but is the only one on the shelf within 400 miles. I can’t believe how this works and how hard to find parts when out of town! You guys are great!
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Old 07-11-2019, 12:03 PM   #13
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I carry Morris splice connectors so as to be able to bypass the transfer switch if needed.
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Old 07-11-2019, 12:06 PM   #14
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Thank you

I would like to Thank everyone for the replies. It confirmed to me that ATS was bad. Once repaired I will update you. I will also let you know how Mobil RV Mechanic did. He seems to be a very nice and knowledgeable guy who is trying to help someone keep going. Unlike the dealers who asked me repeatedly where I bought the RV.
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