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Open Roads Forum  >  Fifth-Wheels

 > Dometic Refridgerator stopped cooling

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Celticman

NV

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Posted: 02/26/19 08:17pm Link  |  Quote  |  Print  |  Notify Moderator

The flue is warm to the touch, so I'm unsure about the heat element being bad. I may take it out to have a look see. Maybe I'll change the fuses anyway. At this point I'm thinking control board.

Old-Biscuit

Verde Valley

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Posted: 02/26/19 08:31pm Link  |  Quote  |  Print  |  Notify Moderator

Celticman wrote:

Power cord is hot and fuses are good.



Lower circuit board.....bottom right side are 2 black leads that are for the heater element
They connect at J7 & J8
One is 120V AC HOT and other is Neutral/Common

Typically 'odd' are HOT and 'even' are Neutral/Grounds
So with Fridge in 'AUTO' and temp warm enough for thermostat to call for a cooling cycle....J7 should be HOT

Check resistance of element when measured at the 2 leads 44 ohms

Should have continuity when measured at the 2 leads


Dometic 3850644422 Heater Element


On Edit:
Flue warm.....element is 325W and should generate 350*F temps in order to boil the liquid ammonia into a vapor

IF element checks good
Then unplug fridge temp sensor leads (Thermistor)
Left side P2 connector....2 White leads

Run fridge for 12 hrs and check temps in freeze & food compartment.
Should be 10*F/lower in freezer and 38*F/lower in food compartment

This will test that cooling unit is functioning

* This post was edited 02/26/19 08:41pm by Old-Biscuit *


Is it time for your medication or mine?


2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
On the Road Debt Free April '07
Off the road still Debt Free Jan. '14

Celticman

NV

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Posted: 03/05/19 10:52pm Link  |  Quote  |  Print  |  Notify Moderator

Well, I don't know.... Everything is working. Everything checked okay. I went ahead and replaced the 2 fuses but the fridge had already started cooling down.
Perhaps a cooling unit blockage?
Thanks again for the input.

jkwilson

Indiana

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Posted: 03/06/19 06:27am Link  |  Quote  |  Print  |  Notify Moderator

Celticman wrote:

Well, I don't know.... Everything is working. Everything checked okay. I went ahead and replaced the 2 fuses but the fridge had already started cooling down.
Perhaps a cooling unit blockage?
Thanks again for the input.


Hard to guess without some info about what was happening. Both compartments not cooling or not cooling enough? What temperatures were you seeing?


John & Kathy
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Celticman

NV

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Posted: 03/09/19 11:55pm Link  |  Quote  |  Print  |  Notify Moderator

Temperature for the fridge was 50's-60's. Freezer was 30's.
Now fridge is 30's and freezer is 0*- 10*

Ski Pro 3

Placerville, CA

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Posted: 03/11/19 07:48pm Link  |  Quote  |  Print  |  Notify Moderator

Sounds like it's fixed then. Intermittent problems are usually bad electrical connections. Maybe something like Corrosion-X sprayed on connections will keep it from returning.


2006 Dodge Ram 4x4 crew cab w/diesel and manual tranny.
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Celticman

NV

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Posted: 03/13/19 06:44pm Link  |  Quote  |  Print  |  Notify Moderator

Possibly? I checked the connections and they looked okay.
Well, thanks again to everyone for the input.

slomark

San Luis Obispo, CA

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Posted: 03/22/19 10:34pm Link  |  Quote  |  Print  |  Notify Moderator

I found their customer service beneficial in troubleshooting the problems with mine.


'09 Heartland Sundance 285bh, '08 CTD

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