RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  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 08-14-2017, 09:56 AM   #1
Join Date: Feb 2017
Posts: 38
hot water heater-no hot water propane and electric

Wife and I are on a week long trail run before going full time in November and had a problem this morning. No hot water. We have had this problem before. First time the board was replaced. It worked for a bit then went out again then thermostat was replaced. Now here we are out again. It doesn't work on both electric and gas. The board makes a high pitched noise when electric is on which I read is normal. And the board lights up and igniter fires when turning on propane at least it makes the clicking noise. That's exactly what it did when the thermostat went out the last time. I think it's the thermostat again. Any other thoughts? Or a better way to diagnose the issue?


2017 Thor Challenger 37KT
fluffybunny 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 08-14-2017, 10:07 AM   #2
Senior Member
Join Date: Sep 2014
Posts: 3,381
The thermostat and other safety devices are normally closed and you can ohm the switch and check for continuity.

For troubleshooting you could short across (just momentarily) to make sure the gas valve comes on.

1996 Tioga Class C
400 amp/hrs solar, Trimetric

Retire 2020 GLW
okcnewbie is offline   Reply With Quote
Old 08-14-2017, 10:14 AM   #3
Senior Member
60sumtin's Avatar
Outdoors RV Owners Club
Join Date: Jul 2017
Location: Cypress County, AB 🇨🇦
Posts: 2,583
The first repair only involved replacing the board and not the thermostat? Since only the board was replaced and used with the old t-stat and the new board only worked for a bit I don't think the t-stat would have caused a board failure. It's basically just an on/off switch. I think a line level electrical problem caused the board to fail

As for the high pitched noise coming from the board I've never heard that from any of my trailers.
2011 ORV Creek Side 22RB
60sumtin is offline   Reply With Quote
Old 08-14-2017, 03:01 PM   #4
Join Date: Aug 2013
Location: St Louis area
Posts: 81
I had the same problem with my Atwood heater - 10 gallon unit that operates on gas or electric. I ended up replacing the water heater ECO thermostat assembly - part no 91447 and the water heater thermal cut off switch - part no 93866. I did this as a first step and it fixed my situation. Not sure which part fixed the problem but it was inexpensive and easy to do both at the same time. Yours may be different but if you search these items it will give you an idea what you are looking at. Good luck.
Shawn E is offline   Reply With Quote
Old 08-14-2017, 05:58 PM   #5
Join Date: Feb 2017
Posts: 38
I solved the problem, I took the board to a RV dealership to get them to test it per Thors instructions, and they didn't actually have a test rig for it, but suggested to replace the thermocupler. The first suggestion was just run without the thermocupler, I tried that and it did not work, connected the original thermocupler back and tested it again and it worked, so I'm guessing it was just a loose connection somewhere. I have some extra thermocuplers in case that is the problem if it happens in the future.
2017 Thor Challenger 37KT
fluffybunny is offline   Reply With Quote

electric, heat, heater, propane, 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
Where is the switch located to switch my hot water heater to electric from propane chas26 Thor Industries Owner's Forum 3 09-04-2014 07:08 AM
Removing Propane Water Heater and Replacing with Electric Only ChasL Class C Motorhome Discussions 4 06-17-2014 09:19 PM
All Electric versus Propane and Electric Catch and Release Class A Motorhome Discussions 14 11-26-2013 04:04 PM
Hot Water heater elec and propane? frazierdee Monaco Owner's Forum 8 11-03-2012 10:55 AM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 01:48 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.