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

Go Back   iRV2 Forums > RV SYSTEMS AND TECHNOLOGIES FORUMS > RV Systems & Appliances
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 05-21-2022, 12:55 PM   #1
Junior Member
 
Join Date: Jul 2021
Posts: 28
What ohms should my water heater element have?

I have a trailer with an atwood 6gal water heater. It heats off propane just fine but won't for electricity. I pulled the heater element. It's 120v 1400w. My multimeter only has a 2k ohm selection. It's reading .009. Is that 9ohms? Is that acceptable? I'm trying to look online and it keeps just showing elements with a 3-5000w rating. Any info helps. Thanks.
Torchic 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 05-21-2022, 01:17 PM   #2
Senior Member
 
Ford Super Duty Owner
Georgie Boy Owners Club
Join Date: Mar 2015
Posts: 270
Ohms law..

1400 watts / 120 volts = 11.6 amps

120 volts / 11.6 amps = 10.34 ohms
Concord is offline   Reply With Quote
Old 05-21-2022, 01:21 PM   #3
Senior Member
 
xrated's Avatar
 
Join Date: Jan 2017
Location: "Murvul", TN
Posts: 1,487
Quote:
Originally Posted by Torchic View Post
I have a trailer with an atwood 6gal water heater. It heats off propane just fine but won't for electricity. I pulled the heater element. It's 120v 1400w. My multimeter only has a 2k ohm selection. It's reading .009. Is that 9ohms? Is that acceptable? I'm trying to look online and it keeps just showing elements with a 3-5000w rating. Any info helps. Thanks.
If it truly is a 1400W heater element, the ohm value should be in the 10.3Ω range.
__________________
2016 F350 Crew Cab Dually Diesel King Ranch 4x4
2018 Grand Design Momentum 394M Toy Hauler
Excessive Payload Capacity is a Wonderful Thing!
xrated is offline   Reply With Quote
Old 05-21-2022, 02:42 PM   #4
Junior Member
 
Join Date: Jul 2021
Posts: 28
So is the .009 I'm seeing mean 9? And is that to low?
Torchic is offline   Reply With Quote
Old 05-21-2022, 02:55 PM   #5
Senior Member
 
Ford Super Duty Owner
Georgie Boy Owners Club
Join Date: Mar 2015
Posts: 270
Yes, and it's close enough.
Zero would mean it's shorting out, and would trip fuses..
High (infinity) would mean burned out (broken).
Concord is offline   Reply With Quote
Old 05-21-2022, 02:56 PM   #6
Senior Member
 
powderman's Avatar
 
Join Date: Mar 2010
Location: N. E. Ohio & Lady Lake Fl.
Posts: 1,100
So you have the element disconnected. It the resistance is low the would indicate the heating coil is good. Did you verify that the voltage to the heater is good??
__________________
Ron WD8CBT

I started out with nothing and I still have most of it left
powderman is offline   Reply With Quote
Old 05-21-2022, 03:14 PM   #7
Senior Member
 
Old-Biscuit's Avatar
 
Join Date: Nov 2015
Posts: 21,613
Is this for you 2015 Zinger?

Atwood GC6A-10E
When On Electric need to have 12VDC form circuit board to DC Relay via the Yellow wire
DC Relay then closes allowing 120VAC to go from Circuit Breaker to/thru Relay to Element

DC Relay/Element both under that protective cover on WH Tank
__________________
I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor & NUWA 5vr
US NAVY---USS Decatur DDG-31
Old-Biscuit is online now   Reply With Quote
Old 05-22-2022, 06:59 PM   #8
Senior Member


 
Join Date: Feb 2020
Location: NY State
Posts: 1,686
Quote:
Originally Posted by Concord View Post
Ohms law..

1400 watts / 120 volts = 11.6 amps

120 volts / 11.6 amps = 10.34 ohms
I think Ohm's Law is not directly applicable to a room-temperature heating element. Resistance generally rises as the element heats up. I'd expect the amblent temperature resistance to be considerably lower than the in-use resistance. The manufacturer might publish a room-temperature test value.
__________________
John
1976 Southwind 28', '96 Winnie 34WK,
2006 Tiffin Allegro Bus 40QDP
n2zon is offline   Reply With Quote
Old 05-22-2022, 08:09 PM   #9
Senior Member
 
Old-Biscuit's Avatar
 
Join Date: Nov 2015
Posts: 21,613
Quote:
Originally Posted by n2zon View Post
I think Ohm's Law is not directly applicable to a room-temperature heating element. Resistance generally rises as the element heats up. I'd expect the amblent temperature resistance to be considerably lower than the in-use resistance. The manufacturer might publish a room-temperature test value.
Water heater elements (fridge also) should be tested for resistance when luke warm/cool in order to be within mfg. specs


Atwood uses a 1400W element and resistance should be 10ohms +/- 7.5%
Suburban uses a 1440W element and resistance should be 10ohms +/- 7.5%
__________________
I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor & NUWA 5vr
US NAVY---USS Decatur DDG-31
Old-Biscuit is online now   Reply With Quote
Old 05-22-2022, 08:57 PM   #10
Senior Member
 
Join Date: Jan 2020
Posts: 449
Just to add. I thought my element was bad, but it ended up being the switch.
__________________
The best place is the next place.
travelorer99 is offline   Reply With Quote
Old 05-24-2022, 06:53 AM   #11
Junior Member
 
Join Date: Jul 2021
Posts: 28
Yes it is for my 2015 zinger with the atwood GC6AA-10E

Haven't made much progress unfortunately. Been super busy. Looked up some videos and went to check the 2amp fuse on the circuit board. Well as I was pulling it out, it broke in half. So I now have half of one of the pins still in there, stuck from corrosion. Once I get that fixed I'll be checking wires and what not. However some videos said it could be the t-stat. Can I rule that out though because the water heater does work correctly on propane?
Torchic is offline   Reply With Quote
Old 05-24-2022, 10:41 AM   #12
Senior Member
 
Old-Biscuit's Avatar
 
Join Date: Nov 2015
Posts: 21,613
Quote:
Originally Posted by Torchic View Post
Yes it is for my 2015 zinger with the atwood GC6AA-10E

Haven't made much progress unfortunately. Been super busy. Looked up some videos and went to check the 2amp fuse on the circuit board. Well as I was pulling it out, it broke in half. So I now have half of one of the pins still in there, stuck from corrosion. Once I get that fixed I'll be checking wires and what not. However some videos said it could be the t-stat. Can I rule that out though because the water heater does work correctly on propane?
2A fuse protects the circuit board

T-stat & ECO are SAME for Electric and/or Propane
DC is same for electric and/or propane functions
*DC via yellow wire to DC Relay fr 120VAC to element

Some videos are WRONG!


Color coded wiring for 6 gal 10E and 10 gal 4E versions
__________________
I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor & NUWA 5vr
US NAVY---USS Decatur DDG-31
Old-Biscuit is online now   Reply With Quote
Old 05-24-2022, 10:54 AM   #13
Senior Member
 
Join Date: May 2018
Posts: 513
Is the element getting 120v? Is it heating up the water?

Instead of measuring the resistance, another probably easier and more accurate method is to measure the current. If you have an EMS it will likely give you a current reading. If not you could probably find a place to put a loop current meter , either at the water heater, or transfer switch, or circuit panel.
dssl is offline   Reply With Quote
Old 05-27-2022, 09:02 PM   #14
Junior Member
 
Join Date: Jul 2021
Posts: 28
Got it fixed!!!!! I was installing the new element, figured I already had the old one out and it's ohm reading was sub-standard. While replacing I had to unwrap some electrical tape someone put there and found that apperantly the white wires melted. Cut and cleaned them up, put everything back and it's working. I haven't tested it at full temp yet. But so far the hot water is at least noticeably warmer than the cold. My ems is pulling between 12 and 14 amps so the proper amount of power is being used.
Attached Thumbnails
Click image for larger version

Name:	20220527_182437.jpg
Views:	4
Size:	195.7 KB
ID:	366765  
Torchic is offline   Reply With Quote
Reply

Tags
element, heat, heater, water, water heater



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
1500w water heater element ok to replace 1440w element? ascdds Class A Motorhome Discussions 9 12-26-2018 06:49 PM
ELEMENT :: 2016 Evergreen Element 26RBSS NicknTina iRV2 Owners Registry 1 02-11-2017 11:12 PM
Ohms readings maxwell18 Technology: Internet, TV, Satellite, Cell Phones, etc. 4 11-23-2015 03:20 PM
Generac Q-55, test #6, 2.3 ohms vs 1.43 specs John USA RV Systems & Appliances 3 07-16-2015 09:17 PM
SW10 DE water heater on AC - should I see 110v at the element terminals? roaming RV Systems & Appliances 5 12-12-2011 06:28 AM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 12:01 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.