Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 03-09-2016, 11:09 AM   #1
Junior Member
 
Join Date: Feb 2016
Posts: 24
Buzz at power switch when plugged in

Have had my rig for a few months. The power switch has had a slight buzz or hum when plugged into shore power since I got it. It recently has become slightly louder.

Is this normal? Is it a problem? Can I repair it?
__________________

__________________
isaac W is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 03-09-2016, 11:25 AM   #2
Senior Member
 
BFlinn181's Avatar
 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 16,229
Please identify what you mean by 'power switch.' If you're talking about the automatic transfer switch, it might have a 60 Hz buzz. You could check that all fasteners are tight to see if it changes.
__________________

__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is offline   Reply With Quote
Old 03-09-2016, 12:42 PM   #3
Junior Member
 
Join Date: Feb 2016
Posts: 24
Quote:
Originally Posted by BFlinn181 View Post
Please identify what you mean by 'power switch.' If you're talking about the automatic transfer switch, it might have a 60 Hz buzz. You could check that all fasteners are tight to see if it changes.
Thanks, yes, I mean the automatic transfer switch. Okay, I will check fasteners.
__________________
isaac W is offline   Reply With Quote
Old 03-09-2016, 02:16 PM   #4
Senior Member
 
falconman's Avatar


 
Join Date: Apr 2008
Location: On the Road
Posts: 769
If you could identify the maker/model of the ATS it would be helpful. Is addition to checking the connections, the contacts may be able to be cleaned. If that doesn't help then a replacement contact assembly might be available or just replacing the switch. Make sure all power is off!
__________________
Dan & Arlene
2005 Monaco Dynasty Diamond IV
Chasing the good weather
falconman is offline   Reply With Quote
Old 03-11-2016, 06:03 PM   #5
Senior Member
 
chboone's Avatar


 
National RV Owners Club
Ford Super Duty Owner
Join Date: Sep 2010
Location: Horse Town USA, CA.
Posts: 2,933
If you replace the transfer switch make sure is has DC coil relays. One's with AC coils will tend to hum, DC don't.
__________________
1999 35 ft. Dolphin 5350,F53 Chassis Chassis build date 1/99, Banks System, 5 Stars Tune, Air Lift Air Bags front & rear, Koni Shocks,Blue OX TruCenter,TigerTrak track bars front & rear, Roadmaster 1-3/4" rear auxiliary sway bar,2004 F450 Lariat 6.0 Diesel Crew Cab DRW with B & W Custom Truck Bed, 1994 36 ft. Avion 5th Wheel
chboone is offline   Reply With Quote
Old 03-11-2016, 11:40 PM   #6
Senior Member
 
ernest917's Avatar
 
Forest River Owners Club
Join Date: Dec 2010
Location: Woodville, TX
Posts: 557
Most all transfer switches have a slight hum to them.... Nothing to worry about I wouldn't think...
__________________
ernest917 is offline   Reply With Quote
Old 03-12-2016, 10:18 AM   #7
Senior Member
 
Join Date: Nov 2014
Location: TEJAS
Posts: 417
If you use a dc relay in an ac role it is sure to buzz. Perhaps it has dirt or bugs in causing it to buzz. Could also have a loose armature.



What are the differences between an AC and DC coil relay? - Electrical Engineering Stack Exchange
__________________
spyderRV is offline   Reply With Quote
Old 03-12-2016, 09:34 PM   #8
Senior Member
 
chboone's Avatar


 
National RV Owners Club
Ford Super Duty Owner
Join Date: Sep 2010
Location: Horse Town USA, CA.
Posts: 2,933
My 50 amp ESCO transfer switch with DC coils is silent never any hum or buzz. As mentioned buzzing can be caused by various things.

50 Amp Auto-Transfer Switch for RV Applications, Generac RV Automatic Transfer Switch, 50amp ESCO RV Automatic Transfer Switch for RV Applications, Automatic Transfer Switch for RV Generators,Transfer Switch for RV Generators,30 & 50amp Transfer Swit
__________________
1999 35 ft. Dolphin 5350,F53 Chassis Chassis build date 1/99, Banks System, 5 Stars Tune, Air Lift Air Bags front & rear, Koni Shocks,Blue OX TruCenter,TigerTrak track bars front & rear, Roadmaster 1-3/4" rear auxiliary sway bar,2004 F450 Lariat 6.0 Diesel Crew Cab DRW with B & W Custom Truck Bed, 1994 36 ft. Avion 5th Wheel
chboone is offline   Reply With Quote
Old 03-12-2016, 10:55 PM   #9
Senior Member
 
powercat_ras's Avatar
 
Winnebago Owners Club
Solo Rvers Club
Join Date: May 2015
Posts: 1,026
I have a DSI water heater and when I have the AC electric heat switch on the water heater control board makes a high pitched noise, not loud enough to hear in the coach but can hear clearly outside by the water heater, not exactly a hum or buzz but could this be what you are hearing?
__________________
Randy - Manhattan, Kansas
2015 Vista 27N
2016 Honda HR-V
powercat_ras is offline   Reply With Quote
Old 03-13-2016, 11:35 AM   #10
Senior Member
 
Join Date: Nov 2014
Location: TEJAS
Posts: 417
Quote:
Originally Posted by chboone View Post

The key phrase is, " Designed with dc coiled relays to reduce hum,"

You can't just substitute a dc relay into a application supplying ac power.
__________________
spyderRV is offline   Reply With Quote
Old 03-13-2016, 12:20 PM   #11
Senior Member
 
chboone's Avatar


 
National RV Owners Club
Ford Super Duty Owner
Join Date: Sep 2010
Location: Horse Town USA, CA.
Posts: 2,933
Notice what it says under discription, Coil: 110 VDC

http://escotest.jimdo.com/electrical...uct-6625681554

Esco LYGHT 50A Relay Base Automatic Transfer Switch - Transfer Switches - Electrical
__________________
1999 35 ft. Dolphin 5350,F53 Chassis Chassis build date 1/99, Banks System, 5 Stars Tune, Air Lift Air Bags front & rear, Koni Shocks,Blue OX TruCenter,TigerTrak track bars front & rear, Roadmaster 1-3/4" rear auxiliary sway bar,2004 F450 Lariat 6.0 Diesel Crew Cab DRW with B & W Custom Truck Bed, 1994 36 ft. Avion 5th Wheel
chboone is offline   Reply With Quote
Old 03-13-2016, 12:46 PM   #12
Senior Member
 
Join Date: Nov 2014
Location: TEJAS
Posts: 417
Went to the website, downloaded the repair parts pdf, looked up the timer delay board and found a picture of it.



It has a full wave diode bridge and a storage capacitor on the left side. It converts the ac to dc to energize the relays.
__________________

__________________
spyderRV is offline   Reply With Quote
Reply

Tags
power



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
No AC power when plugged into shore power Cek Class A Motorhome Discussions 18 05-29-2013 10:25 AM
DS DP Transfer Switch Heat and Buzz RVin On Up Newmar Owner's Forum 2 05-14-2008 05:04 AM
Lights on warning bell, buzz, or what ever it is. SocalHodaka Workhorse and Chevrolet Chassis Motorhome Forum 4 03-02-2007 02:12 PM
Loud Switch Box Buzz artro Newmar Owner's Forum 5 05-04-2006 04:13 PM
AC leaks,paint peel,speaker buzz,hydraulic leak,steering,exhaust brake... Lynn Marie Alpine Coach Owner's Forum 15 11-26-2005 11:40 AM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 02:58 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.