Reply
 
Thread Tools Display Modes
Old 10-06-2014, 03:29 PM   #1
Senior Member
 
DaveSchwartz's Avatar
 
Join Date: May 2014
Location: Waterloo Region
Posts: 690
Replacing Dometic refrigerator blue LEDs

Has anyone replaced the LEDs on the interior light board on a newer Dometic refrigerator?

I don't know what genius at Dometic designed these new fridges with the blue LEDs but the light they produce is just ghastly for looking at the food in a refrigerator. They bother me so much I want to do something about it.

I've taken a look at the lighting board (behind the door switch at the top of the refrigerator compartment and the light is produced by six 7.6mm square LEDs. There are three in series with a 150 ohm dropping resistor (2 of these strings in parallel) across the switched 12V.

Does anyone have any suggestions for a replacement LED part? I've found a possible substitute on Newark.com (Cree CP41B-WGS that puts out 3cd at 90 degree spread). The 150 resistor seems about right for a string of 3 3.6V 20ma LEDs with a source voltage of 13.8.

Any electronic tech out there think this will work?

I suppose I could just disable the LED strings, wire a couple of wedge bulb bases and use some warm-white wedge LED bulbs.
__________________

__________________
2015 Rockwood Signature UltraLite 8282WS Platinum, GY Marathon LRD, TST 507RV TPMS
2005 GMC 2500HD CCSB D/A, Curt E16, Prodigy P2, Garmin RV760LMT w/BC-20 b/u cam

Self restraint is for the young. I'm old and want it NOW!
DaveSchwartz is offline   Reply With Quote
Old 10-06-2014, 04:36 PM   #2
Senior Member
 
Join Date: Aug 2014
Posts: 216
I really don't like them as well.
__________________

__________________
Carrier is offline   Reply With Quote
Old 10-06-2014, 04:49 PM   #3
Senior Member
 
DaveSchwartz's Avatar
 
Join Date: May 2014
Location: Waterloo Region
Posts: 690
If I find a viable way of replacing them, I'll let the forum know.
__________________
2015 Rockwood Signature UltraLite 8282WS Platinum, GY Marathon LRD, TST 507RV TPMS
2005 GMC 2500HD CCSB D/A, Curt E16, Prodigy P2, Garmin RV760LMT w/BC-20 b/u cam

Self restraint is for the young. I'm old and want it NOW!
DaveSchwartz is offline   Reply With Quote
Old 10-08-2014, 07:26 PM   #4
Junior Member
 
Join Date: Dec 2007
Posts: 6
We hate the light as well. I'll be following this.

On another note does your freezer door close tight? Ours is loose and frost builds up at the top.


Sent from my iPad using Forest River Forums
__________________
pahl68 is offline   Reply With Quote
Old 11-17-2014, 08:08 PM   #5
Senior Member
 
DaveSchwartz's Avatar
 
Join Date: May 2014
Location: Waterloo Region
Posts: 690
Getting back to this project...

I rigged up a breadboard with six of the replacement Cree white LEDs in about the same layout as on the original board and photographed the two side by side. I used a very fast shutter/small aperture/low ISO until I no longer got the centers saturated so I could get an objective comparison of the light level. The original blue is just a bit brighter but that may be because they have a tighter beam pattern - they are probably the 60 degree lenses whereas the white LEDs I bought are 90 degree - pretty close though. That probably won't matter when the white translucent diffuser is on top. The white LEDS are very well color balanced - the RGB values are nearly identical.

Now I just need to desolder the originals from the board and put in the replacements.
Attached Thumbnails
Click image for larger version

Name:	Dometic frig LED orig blue - new white.JPG
Views:	148
Size:	18.3 KB
ID:	66549  
__________________
2015 Rockwood Signature UltraLite 8282WS Platinum, GY Marathon LRD, TST 507RV TPMS
2005 GMC 2500HD CCSB D/A, Curt E16, Prodigy P2, Garmin RV760LMT w/BC-20 b/u cam

Self restraint is for the young. I'm old and want it NOW!
DaveSchwartz is offline   Reply With Quote
Old 11-18-2014, 05:58 PM   #6
Senior Member
 
offroad's Avatar
 
Join Date: Jul 2014
Location: SW Missouri
Posts: 421
Thanks for sharing.

Some pics during disassembly and soldering along with links to the leds you're using would also be greatly appreciated.
__________________
2017 Open Range - Light 297RLS, BX1 Gooseneck
2014 Ram 2500 4x4 CCSB 6.7L 68RFE
offroad is offline   Reply With Quote
Old 11-19-2014, 07:49 AM   #7
Senior Member
 
extremebike's Avatar
 
Join Date: Jul 2011
Location: Ontario, Canada
Posts: 210
If you are bound and determined to replace the LEDS then cutting the legs from the led side is the first step. Heat the leg (try not to get the soldering iron on the printed circuit board. Use a pliers to gently remove the leg.

After all are done then use solder wick (braided copper mesh infused with flux) to remove excess solder. Be careful, this is where the printed circuit boards get damaged.

I assume that you have checked that the pin outs are the same as the originals. If so then gently insert the new LEDS and heat the leg and circuit board at the same time and melt a judicious amount of solder. It should run right on to both the leg and copper on the board.

Good luck. solder wick is available from Newark too.
__________________
regards,
Extremebike

2004 Ford F550 6l Lariat SuperCrew, Fontaine Bed,
Link Systems Air Ride
2011 Sterling 32RL with Michelin XPS tires
extremebike is offline   Reply With Quote
Old 11-19-2014, 08:00 AM   #8
Senior Member
 
Witch Doctor's Avatar
 
Join Date: Feb 2012
Location: Clarksville Va.
Posts: 7,162
Quote:
Originally Posted by pahl68 View Post
We hate the light as well. I'll be following this.

On another note does your freezer door close tight? Ours is loose and frost builds up at the top.


Sent from my iPad using Forest River Forums
It sounds like you need a new door seal. That is caused by air....
__________________
Rockwood #8289 WS 2012
F250 6.0 / Husky 16k
With 4 point leveling system
Witch Doctor is offline   Reply With Quote
Old 11-19-2014, 08:04 AM   #9
Senior Member
 
Witch Doctor's Avatar
 
Join Date: Feb 2012
Location: Clarksville Va.
Posts: 7,162
Quote:
Originally Posted by DaveSchwartz View Post
Has anyone replaced the LEDs on the interior light board on a newer Dometic refrigerator?

I don't know what genius at Dometic designed these new fridges with the blue LEDs but the light they produce is just ghastly for looking at the food in a refrigerator. They bother me so much I want to do something about it.

I've taken a look at the lighting board (behind the door switch at the top of the refrigerator compartment and the light is produced by six 7.6mm square LEDs. There are three in series with a 150 ohm dropping resistor (2 of these strings in parallel) across the switched 12V.

Does anyone have any suggestions for a replacement LED part? I've found a possible substitute on Newark.com (Cree CP41B-WGS that puts out 3cd at 90 degree spread). The 150 resistor seems about right for a string of 3 3.6V 20ma LEDs with a source voltage of 13.8.

Any electronic tech out there think this will work?

I suppose I could just disable the LED strings, wire a couple of wedge bulb bases and use some warm-white wedge LED bulbs.
I think it would be easier to install your last paragraph with wedge led bulbs. and get better lighting at the same time...
__________________
Rockwood #8289 WS 2012
F250 6.0 / Husky 16k
With 4 point leveling system
Witch Doctor is offline   Reply With Quote
Old 11-19-2014, 11:58 AM   #10
Member
 
Join Date: May 2014
Location: Pflugerville, Texas
Posts: 40
Dometic just sent me a white bulb replacement for free. Give them a call at 574-294-2511. Five minute change out to white light.
__________________

__________________
TheBennetts is offline   Reply With Quote
Reply

Tags
dometic, led, refrigerator

Thread Tools
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




» Virginia Campgrounds

Reviews provided by




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 09:47 PM.