Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×

Thread Tools Search this Thread Display Modes
Old 03-23-2021, 11:32 AM   #1
Taking it as it goes
Join Date: Sep 2018
Posts: 27
Atwood water heater temp adjustment?

I have the Atwood GCH6A-10E hot water heater on my 2018 Navion. Of late it sounds as if the water is almost boiling in the tank when it kicks on in electric mode: lots of popping and crackling noises that's a bit unnerving in the middle of the night right under the bed. I don't remember ever hearing before this winter. The pressure relief valve has never popped off or weeped at all. The manual is not very helpful in answering the question as to whether this model has a temperature adjustment feature.

Any thoughts out there or similar experiences that you've solved?

Free Ranger is offline   Reply With Quote
Old 03-23-2021, 01:59 PM   #2
Winnebago Master
Join Date: Feb 2020
Posts: 687
I don't think that the temperature setting is adjustable. I turn mine off after taking a shower and turn it on again about 15 minutes before needed it the next day.

DavidM is online now   Reply With Quote
Old 03-23-2021, 03:30 PM   #3
Registered User
Join Date: Jul 2014
Posts: 1,336
I assume this technology has not changed in 20 years! If so, the thermostat and ECO touches the tank. It's located behind the black foam tape square if you still have one.

It's just a normally closed (NC) switch that opens at ~145F. So maybe if it's not making contact, or if the contact is oxidized, which is probably the problem, then you just need to clean it with some fine black sand paper (1000 grit), or you may need to replace the thermostat. (ECO too while you are at it.)

I carry a spare. And don't forget to use a protection diode. (See last picture.)


==> When installing the ECO and T-stat, be sure to position the spring so it mates against the plastic protection piece (works like a dielectric plate) and does not SHORT out. ...You sometime need to bend the metal tabs just a tad so you can twist everything in place.

==> If you find your hot water pulses out of the shower after camping for 2 to 3+ weeks, changes are you lost your "air gap" in the tank. To fix this, just turn off the water pressure in the hose, turn off your pump, and open the emergency overflow valve.
Attached Thumbnails
Click image for larger version

Name:	Atwood Water Heater Thermostats.jpg
Views:	18
Size:	275.0 KB
ID:	178003   Click image for larger version

Name:	Water Heater Chamber Picture.jpg
Views:	16
Size:	77.5 KB
ID:	178006  

Click image for larger version

Name:	Atwood 10 Gallon Tank.jpg
Views:	16
Size:	290.3 KB
ID:	178007   Click image for larger version

Name:	Thermal Cutoff Fuse Picture.jpg
Views:	16
Size:	138.0 KB
ID:	178008  

Click image for larger version

Name:	Atwood A10-4E (10 Gal) Water Heater Electrical Wiring.gif
Views:	18
Size:	47.2 KB
ID:	178013  
imnprsd is offline   Reply With Quote
Old 03-24-2021, 10:04 AM   #4
Taking it as it goes
Join Date: Sep 2018
Posts: 27
Great input! I'll give that a try and thank you.
Free Ranger is offline   Reply With Quote
Old 03-24-2021, 03:02 PM   #5
Winnebago Master
Join Date: Nov 2018
Location: Pflugerville/Austin, Tx
Posts: 3,646
Something that can happen might be worth some thought. When electric heating element are used, they can tend to dry minerals on the element and if it get a good thick coat, they can pop and crack as the element heats up. Think of a thin layer of rock (limestone) cracking?
So it might be worth a bottle of vinegar runs through the lines to clear some of the scale off the tank and element?

A test of the thermostat might be done by using a thermometer to check the water temp to see if it is way high?
2015 Winnebago Vista 31KE on 2014 chassis
Morich is online now   Reply With Quote
Old 07-24-2021, 09:03 PM   #6
Winnebago Camper
Join Date: Jul 2021
Posts: 5
Just so people are aware - The "ECO" thermostat on the left is supposed to open at about 82C (180F) and is an emergency backup to the "normal" thermostat on the right that is set for about 60C (140F). They are marked with the temperature on the side that faces the tank. If the ECO thermostat opens, the system is "locked-out" until the power is cycled. The problem in my brand new (May 2021) 2108DS Micro Minnie (with Dometic WH-6GEA water heater) was that both thermostats were 60C and the one on the "ECO" side usually tripped first. That points to a quality control problem at the Supplier.
Tallman is offline   Reply With Quote

atwood, 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
Atwood water heater check valve location & purchases source wagonmaster2 Plumbing | Systems and Fixtures 20 11-22-2013 03:30 PM
Cab heater temp drops at eng idle, 2013 erniet General Maintenance and Repair 7 11-12-2013 10:52 PM
Atwood Water Heater malfunction... AFChap Plumbing | Systems and Fixtures 8 01-21-2009 02:48 PM
Atwood hot water heater low pressure kscouple52 Plumbing | Systems and Fixtures 12 01-13-2009 02:46 AM
Atwood hot water heater Plumbing | Systems and Fixtures 20 12-31-1969 07:00 PM

» Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by Winnebago Industries or any of its affiliates. This is an independent, unofficial site.

All times are GMT -6. The time now is 10:16 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.