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THE REFRIGERATOR IS NOT COOLING NO MATTER THE POSION OF THE…

Customer Question
THE REFRIGERATOR IS NOT...

THE REFRIGERATOR IS NOT COOLING NO MATTER THE POSION OF THE THERMISTOR, HOWEVER THE FREEZER SEEMS TO BE WORKING OK. SAME SYMPTOMS FOR GAS AND ELECTRIC,

Mechanic's Assistant: Has the vehicle turned into a gas hog? And how does it start -- same as usual?

THAT IS NOT RESPONSIVE TO QUESTION

Mechanic's Assistant: What is the model/year of your RV?

2006 FORD TYPE C MOTORHOME COACHMEN

Mechanic's Assistant: Are you fixing your RV yourself? What have you tried so far?

YES, CHECKED FUSES, AIRWAY CIRC. COILS, HEATING ELEMENT, GAS VALVE, CONTROLS

Submitted: 5 years ago.Category: RV
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Answered in 1 minute by:
8/7/2017
RV Mechanic: Randall, RVIA Certification replied 5 years ago
Randall
Randall, RVIA Certification
Category: RV
Satisfied Customers: 28,768
Experience: RVDA/RVIA Master Certified Technician with many years experience.
Verified

Hi! My name is ***** ***** I can assist you with this. I may need some additional information from you first in order to give a complete answer.

Is the fridge level? And may I have the make and model of this fridge?

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Customer reply replied 5 years ago
SURE WHAT IS DO YOU NEED TO KNOW
RV Mechanic: Randall, RVIA Certification replied 5 years ago

Did you miss my response and questions?

Is the fridge level? And may I have the make and model of this fridge?

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Customer reply replied 5 years ago
IT IS LEVEL DOOR SEALS GOOD, IT IS A DOMETIC, AUTO CLIMATE CONTROL ONE MOMENT I WILL GET THE MODEL NUMBER
RV Mechanic: Randall, RVIA Certification replied 5 years ago

Open up the outside inspection cover and see if you can see any yellowish debris around the base of the burner area.

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Customer reply replied 5 years ago
NO LEAK OF ANY KIND, NO ODOR. MODEL DM2652COIL AND CIRC. TUBING ARE HOT TO THE TOUCH, UNIT IS CLEAN, HEATING ELEMENT IS OK, FIRE IS BURNING BRIGHT BLUE, HAVE ADJUSTED THE THERMISTOR SEVERAL TIMES WITH NO LUCK, IT WILL COOL IN THE REFRIDGE FOR A COUPLE HRS. THEN HEAT UP, FREEZER CONTINUES TO WORK
RV Mechanic: Randall, RVIA Certification replied 5 years ago

T​hat sounds like a failed cooling unit, but disconnect the thermistor on the control board and give it a few hours. Bottom plug on top left hand corner. Two wires. See the attached manual link for a copy of the Service Manual. Print that out so you have it. http://www.fourwh.com/NewDometicRefrigeratorManual.pdf

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Customer reply replied 5 years ago
OK, THIS IS ACTUALLY THE SECOND ONE I HAVE TO DO THIS, COULD IT BE THE THERMISTOR AT ALL
RV Mechanic: Randall, RVIA Certification replied 5 years ago

Hard to tell at this point. Testing is the only way to really tell. See testing that in the manual. You need a small glass of ice water and a small digital multimeter. About $20 or so at most hardware stores and easy to use.

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Customer reply replied 5 years ago
GOT THE ICE WATER
HAVE ELECTRIC METERS,
RV Mechanic: Randall, RVIA Certification replied 5 years ago

See that section of the manual. Submerse the thermistor in the ice water for about 5 minutes and then take an ohms reading at the plug. It should read between 7K and 10K ohms.

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RV Mechanic: Randall, RVIA Certification replied 5 years ago

J​ust checking back in to see how the testing came out on the thermistor?

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Customer reply replied 5 years ago
Well,. I checked the thermiater,. Had 7.4 ohms. The freezer was at 28 * refrigerator was at 65*,. After change out. Freezer is at 10- 15* and refrigerator is at 43*. Burner works good,. Heating element checks ok,. Fuses check ok,. Everything seems to work as it should except the cooling. Could are clean, no fan between top and bottom of unit.
RV Mechanic: Randall, RVIA Certification replied 5 years ago

Is this on LP or AC mode?

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Customer reply replied 5 years ago
Either one,. Makes no difference.
RV Mechanic: Randall, RVIA Certification replied 5 years ago

That is usually due to improper installation and venting. See the Service Manual for that information. And this may have been installed without insulation. Is it in a slideout or not? And where on the fins did you mount the thermistor?

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Customer reply replied 5 years ago
It is in a slide,. It is insulted, top right side
RV Mechanic: Randall, RVIA Certification replied 5 years ago

Slideout installations are extremely critical. Most are not done correctly. With the top vent out, can you see underneath the fins on the condenser?

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Customer reply replied 5 years ago
The condenser is mounted to the top back,. Lots of air space and insulation up both sides
RV Mechanic: Randall, RVIA Certification replied 5 years ago

T​he distance from the wall to the coils has to be less than 1/4" on the bottom. On top there can be nothing or a gap between the vent and the bottom of the condenser as that air from below has to come up through the condenser before it exits the vent. There can be no void area above the vent. There has to be a curved piece of aluminum attached to the top of the fridge above the condenser and curved so that it directs the hot air out smoothly and attaches to the upper lip of the vent. Insulation has to be all around that area on both sides and the top. A vent fan is helpful here. Dometic makes a fan kit to assist in the air flow. How does yours stack up? And did you move the thermistor to the top of the fins?

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Customer reply replied 5 years ago
The thermiater is at top right. No gap at top,. No dampber on top of coils,. This installation is original from factory
RV Mechanic: Randall, RVIA Certification replied 5 years ago

And as I mentioned, most are not done correctly. If you aren't sure of this attach a photo of the area looking directly into the upper vent so I can see what it looks like.

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RV Mechanic: Randall, RVIA Certification replied 5 years ago

Just checking back in to see if there was any change in this? If not, I still think the installation is the problem.

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