refrigator

A great tip that I saw on trailer life was to line the back wall of the freezer with those thin pieces of plastic cutting sheets, the real flexible kind. Then all you need to do is remove the shelves and pull out the cutting sheet, flex it and the ice will pop right off. Then replace the sheets and the shelves. It takes all of 2 minutes. This will cut your major defrosts to about once or twice a year if full timing.

dougrainer wrote:

Old-Biscuit wrote:

dougrainer wrote:

Old-Biscuit wrote:
The thermistor in food section is sensing bulb that thermostat uses to determine run cycles in order to maintain food section temp.

Freezer temp.........lower the better.
The freezer section is the first evaporator (low temp evap)in the cooling process. When first cooling fridge the freezer uses up all the cooling until it gets down to roughly 10*F then food section will begin to cool.
When freezer temp is already cold there is more cooling action for the 'high temp evap' which is what thermostat controls

Not correct. The design of an Absorbsion unit, is such that the FIRST extremely cold CU coils are at the freezer. The unit coils then go down to the refer. The Freezer will in practical terms get the same cold(0 to 10 degrees) regardless of the tstat setting as there is NO tstat for the freezer. The design puts the extreme cold to the freezer first. Doug

Aren't we saying the SAME thing :H

This is what you stated----"When first cooling fridge the freezer uses up all the cooling until it gets down to roughly 10*F then food section will begin to cool". The freezer does NOT get cold FIRST and then cools the lower. It does it all at the same time. It just takes longer for the lower to get to sub 40 degrees. Doug

OK........

Food section will be part of the whole cooling process but one will not 'FEEL' the cooling effect due to freezer section absorbing majority of cooling due to it being first in cycle/process.
Only so much cooling available.....based on amount of ammonia that can vaporize and condense back into liquid (which is what absorbs the heat from freezer/food evaps). More heat absorbed in low temp evap less available heat transfer can occur in high temp evap.

Old-Biscuit wrote:

dougrainer wrote:

Old-Biscuit wrote:
The thermistor in food section is sensing bulb that thermostat uses to determine run cycles in order to maintain food section temp.

Freezer temp.........lower the better.
The freezer section is the first evaporator (low temp evap)in the cooling process. When first cooling fridge the freezer uses up all the cooling until it gets down to roughly 10*F then food section will begin to cool.
When freezer temp is already cold there is more cooling action for the 'high temp evap' which is what thermostat controls

Not correct. The design of an Absorbsion unit, is such that the FIRST extremely cold CU coils are at the freezer. The unit coils then go down to the refer. The Freezer will in practical terms get the same cold(0 to 10 degrees) regardless of the tstat setting as there is NO tstat for the freezer. The design puts the extreme cold to the freezer first. Doug

Aren't we saying the SAME thing :H

This is what you stated----"When first cooling fridge the freezer uses up all the cooling until it gets down to roughly 10*F then food section will begin to cool". The freezer does NOT get cold FIRST and then cools the lower. It does it all at the same time. It just takes longer for the lower to get to sub 40 degrees. Doug

What I did in the past was use a hair dryer. It melted the ice fast and drained out the tube. Since then I have purchased a fan that installs to the front of the fins and is distributed by RV Cooling Warehouse. They cost about $18 and I haven't had an ice up problem since. Good Luck.

dougrainer wrote:

Old-Biscuit wrote:
The thermistor in food section is sensing bulb that thermostat uses to determine run cycles in order to maintain food section temp.

Freezer temp.........lower the better.
The freezer section is the first evaporator (low temp evap)in the cooling process. When first cooling fridge the freezer uses up all the cooling until it gets down to roughly 10*F then food section will begin to cool.
When freezer temp is already cold there is more cooling action for the 'high temp evap' which is what thermostat controls

Not correct. The design of an Absorbsion unit, is such that the FIRST extremely cold CU coils are at the freezer. The unit coils then go down to the refer. The Freezer will in practical terms get the same cold(0 to 10 degrees) regardless of the tstat setting as there is NO tstat for the freezer. The design puts the extreme cold to the freezer first. Doug

Aren't we saying the SAME thing :H

Thank you for the explanations.

Bill/Diana wrote:
Hi Brett....I follow the same routine, but I do not wait 1 hour before using the blow dryer. Might I ask why you wait? While in Florida we need to defrost about every 10 days.

Yup,That was an eyeopener for me my first time in Florida.

Hair dryer not too close to coils and a butter knife to help ease the ice off faster. It's how I do the freezer also.

Again if you are in a humid area it builds up no matter what you do or what your fridge is doing or not doing.

And yes I have had the water in the drain tray freeze so the water could not go down.

Old-Biscuit wrote:
The thermistor in food section is sensing bulb that thermostat uses to determine run cycles in order to maintain food section temp.

Freezer temp.........lower the better.
The freezer section is the first evaporator (low temp evap)in the cooling process. When first cooling fridge the freezer uses up all the cooling until it gets down to roughly 10*F then food section will begin to cool.
When freezer temp is already cold there is more cooling action for the 'high temp evap' which is what thermostat controls

Not correct. The design of an Absorbsion unit, is such that the FIRST extremely cold CU coils are at the freezer. The unit coils then go down to the refer. The Freezer will in practical terms get the same cold(0 to 10 degrees) regardless of the tstat setting as there is NO tstat for the freezer. The design puts the extreme cold to the freezer first. THAT is why so many novices cannot figure out why---
1. The freezer gets so cold so quick but the bottom does not seem to cool instead of waiting 24 hours
2. A DEFECTIVE cooling unit will freeze the freezer but do nothing in the bottom. A LOT of RV's with defective refers get sold this way, because the novice sees that freezer as cold. Doug

The thermistor in food section is sensing bulb that thermostat uses to determine run cycles in order to maintain food section temp.

Freezer temp.........lower the better.
The freezer section is the first evaporator (low temp evap)in the cooling process. When first cooling fridge the freezer uses up all the cooling until it gets down to roughly 10*F then food section will begin to cool.
When freezer temp is already cold there is more cooling action for the 'high temp evap' which is what thermostat controls

Doug, how does the freezer get it's temp setting? My Norcold frig/freezer just has one digital temp setting on the outside. I just push a button repeatedly to scroll through the numbers 1-9.