Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-26-2022, 05:20 PM   #1
2 Rivet Member
 
2011 27' FB Classic
Houston , TX
Join Date: Jun 2020
Posts: 34
Buzzing from Power Supply with no Load

I looked around for a similar issue on the forum, but I couldn't find it - happy to read up elsewhere if someone can point me in the right direction.

I frequently, but not always, have a loud humming sound from the electrical box/power supply when no draw is on the system. As soon as I turn on a light - 110v or 12v - it goes silent. Is this normal? Is it OK? Or is some component about to die?

Thanks so much - Steve
SS-Houston is offline   Reply With Quote
Old 06-26-2022, 06:09 PM   #2
Rivet Master
 
Glenritas's Avatar

 
1969 25' Tradewind
Shasta Lake , California
Join Date: Sep 2012
Posts: 983
You most likely have the Univolt transformer a.k.a. The battery boiler .

It is just a transformer. It drops the voltage from 120v to 14v . When unloaded it hums .

The best thing to do it replace it with a smart charger .
__________________
Glen & Jane 1969 all electric Airstream 25' TradeWind
2014 Toyota Tundra
1998 Chevy Tahoe

WBCCI #6269

My Build Thread https://www.airforums.com/forums/f11...ml#post1997059
Glenritas is offline   Reply With Quote
Old 06-26-2022, 09:10 PM   #3
2 Rivet Member
 
2011 27' FB Classic
Houston , TX
Join Date: Jun 2020
Posts: 34
Good info: is there a smart charger you would recommend?
SS-Houston is offline   Reply With Quote
Old 06-26-2022, 09:46 PM   #4
Half a Rivet Short
 
2017 30' Classic
2022 Interstate 24X
Carlisle , Pennsylvania
Join Date: May 2017
Posts: 14,194
Hi

2011 is a bit late for a Univolt. They typically went away in the last century. That said, indeed converter / chargers do go bad. Humming is not typically the way they die. Whatever you buy, get it from somebody you can talk to on the phone. Buying it on Amazon with "who knows who" at the other end is *not* a good way to go.

Bob
uncle_bob is offline   Reply With Quote
Old 06-27-2022, 04:45 AM   #5
GLCMRANGER - Sue
 
2016 25' International
Littlestown , Pennsylvania
Join Date: Feb 2014
Posts: 308
Talk to Randy at Best Converter....
glcmranger is offline   Reply With Quote
Old 06-27-2022, 11:32 AM   #6
2 Rivet Member
 
2015 20' Flying Cloud
Lander , Wyoming
Join Date: Jan 2017
Posts: 36
Buy a Progressive Dynamics charger/converter. I replaced my OEM charger/converter in my 2015 FC20 with a PD9260C charger/converter. I recommend buying from www.etrailer.com.

PS: also get the PD92201 remote pendant for $13 more. It tells you what the charger/converter is doing.
Wetfeet is offline   Reply With Quote
Old 06-27-2022, 10:25 PM   #7
2 Rivet Member
 
2011 27' FB Classic
Houston , TX
Join Date: Jun 2020
Posts: 34
A corollary question: do I need to be in a hurry to replace this unit? What's the downside when it dies? Will I be stuck in a tight spot? Is it likely to damage any equipment? We're almost always camping on shore power.
SS-Houston is offline   Reply With Quote
Old 06-27-2022, 11:41 PM   #8
Half a Rivet Short
 
2017 30' Classic
2022 Interstate 24X
Carlisle , Pennsylvania
Join Date: May 2017
Posts: 14,194
Quote:
Originally Posted by SS-Houston View Post
A corollary question: do I need to be in a hurry to replace this unit? What's the downside when it dies? Will I be stuck in a tight spot? Is it likely to damage any equipment? We're almost always camping on shore power.
Hi

Well, when the converter / charger supplied by a vendor mentioned in an earlier post failed after 3 weeks of use, it took a bunch of LED lights with it. Still waiting for a replacement or refund. It's only been 4 years so I'm sure it just hung up somewhere .....

Bob
uncle_bob is offline   Reply With Quote
Old 06-28-2022, 07:02 AM   #9
2 Rivet Member
 
2011 27' FB Classic
Houston , TX
Join Date: Jun 2020
Posts: 34
Quote:
Originally Posted by uncle_bob View Post
Hi

Well, when the converter / charger supplied by a vendor mentioned in an earlier post failed after 3 weeks of use, it took a bunch of LED lights with it. Still waiting for a replacement or refund. It's only been 4 years so I'm sure it just hung up somewhere .....

Bob
I'm sure they were just trailblazing our current Covid supply chain issues...give it another week...
SS-Houston is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Power Source Battery Charger / Power Supply T Reno Batteries, Univolts, Converters & Inverters 0 10-01-2018 10:24 AM
New Tires - got Load Range E instead of Load Range D Hyperion 2009-2015 Flying Cloud 49 06-08-2016 06:47 PM
Power Converter & Power Supply Land Shark Batteries, Univolts, Converters & Inverters 8 05-11-2010 09:51 AM
1/2 ton tires- load C to load E John Tires 75 03-20-2009 09:15 AM
Load bearing or not load bearing? Petethefeet Ribs, Skins & Rivets 3 04-27-2008 07:36 AM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.



All times are GMT -6. The time now is 06:38 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.