Sunline RV Forum
Sunline User Photos

Go Back   Sunline Coach Owner's Club > Technical Forums > Repairs and Maintenance
Click Here to Login

Join Sunline Club Forums Today


Reply
 
Thread Tools Search this Thread Display Modes
Old 09-24-2020, 05:09 PM   #1
Junior Member
 
Join Date: Jul 2013
Location: Massachusetts
Posts: 13
SUN #5510
capecamper is an unknown quantity at this point
New water heater shuts off too soon.

I just replaced the dometic water heater in my 264SR. Pretty straight forward since the new one was exactly the same as the old one except for electronic ignition.

When i turn it on, the gas fires up right away but only stays on for about 5 minutes. Not long enough to hear the water. A burst of warm water comes out but then cold.

Any ideas?
__________________

__________________
capecamper is offline   Reply With Quote
Old 09-25-2020, 01:21 PM   #2
Moderator
 
JohnB's Avatar
 
Join Date: Nov 2006
Location: Ohio
Posts: 11,022
SUN #89
JohnB is on a distinguished road
Yes, there are a few things.

First, did a little red light turn on inside on the tank level monitor? It would have the DSI letters next to it, meaning an ignition fault.

But you said this,
Quote:
Pretty straight forward since the new one was exactly the same as the old one except for electronic ignition.
Not sure of your camper model year, but the T264SR model started in 2004 so you would of had a newer Atwood heater with DSI. (Direct spark ignition). The 2004's to 2007's were the same. Unless you have a very early 2004 build date in 2003 which might have the older pre 2003 redesign. But the gas system worked the same on the prior 2003's just the 120 volt electric element part was different.

What was different in the new heater versus the one you took out? Got pics?

For the gas burner and ignition to shut down before the heater reached 140F sort of points to this if it was not a DSI fault.

1. Some how the unit lost 12 VDC power to it. Loose wire maybe?
Odds are low, but not impossible.

2. The new T stat or the ECO thermal disk switch is tripping too early. If either of those switches open up early, it will shut down the heater and you not get a fault. Then when it cools, it may reset and work again until it gets to that heat that is causing a false temp rise.

3. A connection to the PC board is loose, heat may change the connection.

4. The PC board has issues affected by heat. Hopefully not this, but it is not impossible.

The above "assumes" you are running on LP gas only. And not electric and gas at the same time. If the heater was on electric, heated up the heater, then you flipped to gas, 5 minutes may be long enough to heat the rest by gas.

A cold heater, water is 50 to 60F from the well or house, it should take a good 35 to 45 minute burn by the gas only to come up to temp. If the tank was hot to setpoint, then cooled over night, a gas reheat could take approx. 20 minutes.

You can check the water temp, but running hot water out a faucet after purging some water with a thermometer in the water stream. The heater is supposed to shut down at 140F. What water temp does yours's shut down at?

If none of the above seems to help, do you have a volt meter and know how to use it? We can help with trouble shooting further if needed. Please post a pic of the outside of your new one. Dometic may have changed something since the last Atwood's where made.

Hope this helps

John
__________________

__________________
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC

Google Custom Search For Sunline Owners Club
JohnB is offline   Reply With Quote
Old 10-08-2020, 03:00 PM   #3
Senior Member
 
Join Date: Sep 2016
Location: Maine
Posts: 141
SUN #8853
ggrvguy is an unknown quantity at this point
Are you sure water is going into the heater tank? Are there winterizing valves or check valves that maybe installed wrong or in the wrong position? If the tank is empty, it may only run for a short time.
Gary G
__________________
1990 StarRay T170
2008 Chevy Silverado 1500
ggrvguy is offline   Reply With Quote
Reply


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
Soon to be new owner of a 1997 / 1998 Sunline Solaris T-2053 SendChris Introduce Yourself 12 11-17-2014 08:56 AM
Hot water heater shuting off, leaving in the morning HELP!!! captfrank Repairs and Maintenance 3 09-28-2011 11:10 AM
New member... soon-2-B owner (we hope!) dkasten39828 Introduce Yourself 13 09-02-2008 09:01 PM
Hot Water Heater, On or Off? janetpowell Sunline Travel Trailers 11 08-18-2008 08:40 PM
New Owner (well, soon to be) GrayGoose Introduce Yourself 5 09-12-2007 01:16 PM


» Featured Campgrounds

Reviews provided by

Disclaimer:

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


All times are GMT -6. The time now is 06:51 AM.


×