Sunline RV Forum
Sunline User Photos

Go Back   Sunline Coach Owner's Club > Model Specific Forums > Sunline Travel Trailers
Click Here to Login

Join Sunline Club Forums Today

Thread Tools Search this Thread Display Modes
Old 09-11-2019, 10:57 AM   #1
Junior Member
Join Date: Sep 2019
Location: New Hampshire
Posts: 1
SUN #11560
whitemtns is an unknown quantity at this point
T2251 Dometic Refrig issues

We just bought this trailer so I plugged it into shore power and tried out the refrigerator. Next morning it was cool and there were frozen water droplets in the freezer so I felt good. With continued run time, though the both refrig and freezer are no longer cold. Heating element on the back of the refrig is still warm so itís working...

Model is the RM661. Thanks for any advice!

whitemtns is offline   Reply With Quote
Old 09-12-2019, 11:38 AM   #2
Junior Member
Join Date: Aug 2010
Posts: 17
SUN #1342
cnash1970 is an unknown quantity at this point
I have a 1987 T2251 that the refrig went bad this last year. Most likely the ammonia leaked out of it so it no longer gets cold. They are really expensive to rebuild, about $500 to replace the cooling unit and even more for a comparable replacement frig. I removed the old refrig and put in a 4.0 cu. ft regular refirerator that cost under $150. I no longer have an option to use it on LP, but it fit the cabinet quite well. This si the one I bought when on sale:

Chris & Kelly Nash
Rochester, NY
1987 Sunline T2251
TV: 2008 Dodge Durango
cnash1970 is offline   Reply With Quote
Old 09-12-2019, 11:44 AM   #3
Junior Member
Join Date: Aug 2010
Posts: 17
SUN #1342
cnash1970 is an unknown quantity at this point
Sorry. Sent wrong link. This was the frig I purchased:
Chris & Kelly Nash
Rochester, NY
1987 Sunline T2251
TV: 2008 Dodge Durango
cnash1970 is offline   Reply With Quote
Old 09-13-2019, 06:27 PM   #4
JohnB's Avatar
Join Date: Nov 2006
Location: Ohio
Posts: 9,957
SUN #89
JohnB is on a distinguished road
Hi and welcome.

The RM661 is a fairly old fridge. I think it is a mid 80's vintage. These older fridges had to be very level to work correctly and only run that way. While they might run for a while off level, they can overheat easier. The overheating can lead to blockages in the cooling unit or a cooling coil failure due to a leak. Since you just bought it, any of that long term damage to the cooling unit was before your time.

What you are describing by the electric element area being warm but not getting any cooling points to a possible cooling unit blockage or failure.

First off, have you leveled the camper front to back and left to right that if you put a small level on the fridge shelving or on the floor by the fridge, is it level in both directions? If not, shut the fridge down and level it.

The issue is the overheating part. If there is a blockage or a leak in the cooling unit, all the heat being put in by a gas burner or an electric element makes the overheating situation worse. And if left on long enough, the steal can get so hot it may become a fire hazard. In this case the fluid inside the cooling unit is not flowing keeping the steel cooler to not get so hot it overheats and creates issues.

You can try feeling the pipes in the lower part of the fridge, but not directly next to the boiler/heating area. They should be very warm if the burner area is also warm. If they are ambient air temperature or only slightly warm, but the boiler area is warm, and the fridge has been on for several hours, it can point to a blockage in the cooling unit or a cooling unit failure.

If you see yellow residue at the bottom of the gas burner area or smell ammonia, that also is a sign of a cracked cooling unit and all the fluid leaked out.

If you do not see any yellow residue or do not smell any ammonia, that kind of suggests it just blocked in the tubes. Some have tried to correct this by taking the fridge out and rocking it around and upside down trying to break free the clog/blockage. It's a 50/50 shot. Sometimes they get lucky and the clog breaks free, other times it jams harder or won't budge loose. I have never done this but we had a recent member do it and he heard the clog let go as fluid started running in the tubes. It is a trial and error approach and a last ditch effort to get it to work, IF the unit is blocked/clogged.

Hope this helps


PS, they do sell replacement or repaired cooling units. A remanufactured one for a RM661 is $415 plus $65 freight from RV cool. These guys

Here is the remanufactured units pricing
All units purchased using online payment will ship within a few business days. I have bought an all new unit from them, a much newer model, and was pleased with the transaction and the quality. They do not seem to offer a RM661 new coil.

It seems Amazon is selling and all new one for $642 including freight.

Suggest before buying from anyone, call them and confirm the model and serial number of your fridge that what they sell you will fit it.
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499
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

dometic rm661, t2251

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
Refrig replacement MCM Modifications 12 04-19-2018 05:32 PM
Dometic refrig, RM2301, elec/gas. 1989 t-1700 saturn marcom13 Repairs and Maintenance 4 08-08-2014 07:41 PM
New to me T2251 cnash1970 Introduce Yourself 4 08-13-2010 09:09 AM
Dometic Refrig sunshine2boy Sunline Travel Trailers 0 07-28-2010 11:44 AM


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

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:09 AM.