Originally Posted by heron2000
our new dometic refrigerator makes a lot of noise - and it seems to run all the time
does anyone have the same issue - whats the fix
REFRIGERATOR COOLING PROBLEM
Many owners have a refrigerator with two outside access vent covers. One low and one high. The theory is, rising hot air pulls cooler air into the lower vent and a the hotter air vents out the top. Then some genius thought the refrigerator coil fins were not seeing the moving cooler air so they installed a small fan blowing upward to the back of the refrigerator. Then because the coil fins are just about centered on the upper vent, another genius decided to block more than half the vent opening with wood paneling, reasoning the moving air would flow over the coil fins.
The fan in ours was annoying and noisy. We notice the cabinet walls next to the refrigerator were unusually HOT. Removing the vents exposed the wood paneling baffles. Removing the top piece also exposed there is no insulation around the refrigerator.
So, we have a vent that is mostly blocked, a fan to small to do any good and no insulation. And the refrigerator has a cooling problem? DUH!
SOLUTIONS: First, the heat has to get out from behind the refrigerator. It is much more important that the heat escapes than to have mechanical air flow over the coil fins.
I removed the fan and put a bullet through it. Next I cut out as much of the wood paneling blocking the upper vent as I could. I cut some strips of 2" Styrofoam to fit into the sides of the cabinet around the refrigerator closing off that cavity. There is a large cavity above the refrigerator and that was blocked by blocks of 2" Styrofoam. On walls if the cavity behind the refrigerator, I glued Styrofoam there to insulate the surrounding cabinetry.
RESULTS: Five days in Florida 90 + degree weather, evenings mid 80's. NO fan ! No Noise !!! Normal use each day.
Day 1 am - Refrigerator cooled prior to loading - Freezer 2 degrees, Refrigerator 32 degrees. Unit loaded with pre-cooled or frozen items. Propane cooling for 3 hours, 120 Volt cooling the balance of the time.
Day 2 am - Freezer 12 degrees, Refrigerator 46 degrees
Day 3 am - Freezer 10 degrees, Refrigerator 35 degrees
Day 4 am - Freezer 5 degrees, Refrigerator 35 degrees
Day 5 am - Freezer 5 degrees, Refrigerator 35 degrees