Skip to main content ↑ ↓
Topic: Buzzing sound this morning  (Read 311 times) previous topic - next topic

Buzzing sound this morning

Good morning, woke up after a hard freeze last night of 27 degrees.  Have a buzzing sound in the passenger rear of the coach that I can't locate or assess. Coach starts right up and hwh system works fine with no slide/leveling issues.  I would post the quick video I made but this forum doesn't accept the video format from apple.    '04 U295 with Cummins isl.      thanks!
Carl and Fran Isner
'04 U295 36'
Ford Ranger Toad

Re: Buzzing sound this morning

Reply #1 –
Check your transfer switch to see if it is coming from it.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Buzzing sound this morning

Reply #2 –
May be your electrical transfer switch,if you are plugged in to power try unpluging and plugging back in,check for any breakers tripped,someone with more info then me will answer soon.
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: Buzzing sound this morning

Reply #3 –
Buzzing did not go away with unplugging from shore power
Carl and Fran Isner
'04 U295 36'
Ford Ranger Toad

Re: Buzzing sound this morning

Reply #4 –
If your gen will start try running it to see what happens,what is the voltage reading coming in?
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: Buzzing sound this morning

Reply #5 –
I go with Chuck check the transferswitch under the bed. Try turning of you inverter.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Buzzing sound this morning

Reply #6 –
Okay, problem resolved!  Restarted the coach and unplugged from shore again. I started up the generator and also shut off the inverter for one minute.  After everything ran for a bit and was warmed up I shut down again and voila the buzzing was gone.  The purr of the Cummins washed out the buzzing sound while it was on so I was unable to ascertain exactly when the buzzing shut off.  Any thoughts?  Thanks all!
Carl and Fran Isner
'04 U295 36'
Ford Ranger Toad
 

Re: Buzzing sound this morning

Reply #7 –
Quote from: oldguy –
I go with Chuck check the transferswitch under the bed. Try turning of you inverter.

2004 should have the inverter and main transfer switch in one of the streetside bays, not under the bed. 

ETA - forgot about the transfer switch for the sub-panel that houses the breakers for the inverted circuits  :facepalm:

Passenger side rear - all the way in the back or possibly water bay - water pump?  Do you have a furnace or an AquaHot (U295 could potentially have either, I believe). 
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320