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Author Topic: Domestic Refrigerator  (Read 232 times)

MarcAndTeresa

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Domestic Refrigerator
« on: July 14, 2017, 08:15:43 PM »
We are in a 2005 Coachman Santara. We've read through refrigerator chats and not seen our issue. Fridge stopped working when on our first trip. We turned it off for two days and it started working on electric. Two weeks later it stopped working again and we turned it off for 12 hours and it then started working again. It's currently not working again (on electric or propane). We are full timers so this has become a real problem. Any tips or guidance is appreciated!

NY_Dutch

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Re: Domestic Refrigerator
« Reply #1 on: July 14, 2017, 08:37:17 PM »
Your "Dometic" refrigerator has probably started to clog up the tubing with solidified sodium chromate crystals that are blocking the normal coolant flow. When you shut off the fridge for several hours, enough of the crystals may settle out to allow near normal operation for a period, but eventually they will begin to plug up again until the blockage is permanent and irreversible. Sodium chromate is used as an anti-corrosive in the liquefied ammonia and hydrogen gas mixture that creates the circulating cooling fluid. The sodium chromate crystalizes and sticks to the tubing walls when it is overheated, usually due to the refrigerator being operated out of level for too long a period. There is no cure for the blockage except replacing or rebuilding the cooling unit and coils or replacing the entire fridge.
Dutch
2001 GBM Landau 34' Class A
F53 Chassis, Triton V10, TST TPMS
2011 Toyota RAV4 4WD/Remco pump
ReadyBrute Elite tow bar/Blue Ox base plate

regval

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Re: Domestic Refrigerator
« Reply #2 on: July 14, 2017, 09:58:34 PM »
We are in a 2005 Coachman Santara. We've read through refrigerator chats and not seen our issue. Fridge stopped working when on our first trip. We turned it off for two days and it started working on electric. Two weeks later it stopped working again and we turned it off for 12 hours and it then started working again. It's currently not working again (on electric or propane). We are full timers so this has become a real problem. Any tips or guidance is appreciated!

See if you can find the model number of your RV refrigerator and post that information. That will be more helpful than just the model of your RV. Service manuals and troubleshooting guides are available on the internet.
2005 Forest River TT 27BHSS and 2009 Heartland Sundance 2998RB 5vr
2007 Chev Silverado 2500HD WT crew cab, LB, 6.6L, Allison 6sp, B&W Companion Hitch
Retired Biomedical Engineer
Lawrenceville, GA

"Some come to the fountain of knowledge to drink, others just gargle."

Gary RV_Wizard

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Re: Domestic Refrigerator
« Reply #3 on: July 15, 2017, 10:47:48 AM »
Some further explanation of "stopped working" would also be helpful. What info is displayed on the control panel? Any fault lights or codes? When it stops, is it just one mode (LP or electric) or both? Is it partially cold, or  room temperature?  Freezer temp cooling some but not the fridge?  Whatever details you can supply will help get an answer.

It's fairly common practice that a major fault of some sort requires that the fridge be turned off and back on again to reset. The one most likely to do that is an overheated boiler on the cooling unit. That may mean a failing cooling unit, but perhaps could be as simple as a blockage in the air flow over the cooling unit (behind the fridge & outside).
Gary
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Gary Brinck
Summers: Black Mountain, NC
Home: Ocala National Forest, FL

 

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