Jayco RV Owners Forum
 


Reply
 
Thread Tools Display Modes
 
Old 05-14-2013, 11:57 AM   #1
Junior Member
 
Join Date: May 2013
Location: Chula Vista, CA
Posts: 13
Weird Electrical Issue

I have a 31' 1999 Class C Designer. The last couple of times out, I have had this problem. While plugged into 30 amp shore power, when I turn on the electric water heater switch, the frig switches from AC to propane, and gives me the message LO AC. When the water heats up and the heater turns off, the frig goes back to AC. Running lights, TV, etc do not induce the same problem. Any ideas?
__________________

onebud1 is offline   Reply With Quote
Old 05-14-2013, 12:46 PM   #2
Moderator Emeritus
 
Doug's Avatar
 
Join Date: Oct 2012
Location: Cincinnati, Ohio
Posts: 4,761
Thinking out loud

Maybe your heating element is on its way out and the resistance has increased to draw more than its share of power.
Seeing the 30 amp source drop to a certain level due to this increased draw by the electric element is causing computer to switch frig from ac to propane?

Just a thought.

Best regards,
Doug
__________________

__________________

Southwest, Ohio
2016 Toyota Tundra SR5, 5.7 V8
2017 Jayco 24RBS
Doug is offline   Reply With Quote
Old 05-14-2013, 01:15 PM   #3
Senior Member
 
Join Date: Dec 2012
Location: Western New York
Posts: 138
Yeah, I think I'm on the same page as Doug (except resistance would decrease for higher current draw). You can measure the AC voltage either at the fridge or water heater before and after the water heater kicks on. There should be a few volt drop when the water heater is ON, but not a large drop.

Also, off the top of my head, due to the age of your vehicle, corrosion on the wires at the connection points (check main plug blades for discoloration) or perhaps the resistors/caps on the fridge detect circuit are drying out and causing erroneous voltage readings. Just WAGs at this point until we get some voltage readings.

Does this occur when other large loads are applied (AC or microwave)?

Kris
LkptRvPilot is offline   Reply With Quote
Old 05-14-2013, 02:59 PM   #4
Senior Member
 
tnchuck100's Avatar
 
Join Date: Jun 2012
Location: Sparta, TN
Posts: 1,174
A water heater heating element will not increase resistance and draw more power. It does not act like a motor.

Your most likely cause is going to be a poor connection at the service pedestal or when the wires connect at the converter. Feel the plug at the pedestal. Is it warm or hot? Do the blades on the plug appear to have been overheated? At the converter are the wires from the power cord scorched or showing signs of overheating? If you find this to be the case you will need to remove the connections and cut of the bad wire ends to get clean copper. You may have to use a wire brush and sand paper on the terminals to clean those up.

Something is causing a drop in voltage. The water heater is about a 1500 watt load. But it, itself, is not causing the problem. It is merely the item that causes the real problem to become apparent.
__________________
Chuck - Sparta, TN
2012 Jay Flight 22FB, 2 x Honda EU2000i
2013 GMC Yukon XL Denali AWD

EDUCATION is what you get when you read the fine print.....
EXPERIENCE is what you get when you don't.
tnchuck100 is offline   Reply With Quote
Old 05-15-2013, 09:48 AM   #5
Junior Member
 
Join Date: May 2013
Location: Chula Vista, CA
Posts: 13
Looks like we are going to replace the power cable. Will let you know how that goes. Thanks for all the suggestions...
__________________
onebud1
1999 Designer
31' Class C
Chula Vista, CA
onebud1 is offline   Reply With Quote
Old 05-19-2013, 09:24 AM   #6
Senior Member
 
Join Date: Feb 2010
Location: Tennessee
Posts: 110
In the for what it's worth category....I agree with TNChuck. You don't need to replace the cable. Just check the ends and replace whatever is corroded or shows signs of heat.
__________________
Pam and Nick Walters
28.5 RLS FW
Dodge 2500 HD
2 spoiled rotten Scotties
skymutt is offline   Reply With Quote
Old 06-24-2013, 09:08 AM   #7
Junior Member
 
Join Date: May 2013
Location: Chula Vista, CA
Posts: 13
Just wanted to say thanks for the suggestions and post an update. Replaced the Power Cable and Transfer switch (arcing inside switch...thank goodness it didn't catch fire). All is well now.
__________________

__________________
onebud1
1999 Designer
31' Class C
Chula Vista, CA
onebud1 is offline   Reply With Quote
Reply

Thread Tools
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


» Virginia State Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -6. The time now is 09:49 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2002-2016 Social Knowledge, LLC All Rights Reserved.