Extreme refrig/freezer - make it go low- How?


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Old 06-19-10, 06:59 AM
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Extreme refrig/freezer - make it go low- How?

If say you want to get your frig and freezer to be 5 or 10*F
lower -
How could you do it ?
- Add another fan or two into the compartments ?
- Have a bigger or second compressor ?
- Use or have more refrigerant somehow in the lines ?
- Have bigger/more evap coil fins ?
- Get more frost/ice to build up ?
- Run shorter defrost times ?
- Use different defrost thermostat (lower temp range) ?
- what?
Someone has must hav already tried to do this somewhere.

I see in the major supermarkets - every single one of their
freezers for icecream/frozenfoods are set at:
-10*F (nothing higher)
refrig section w/ milk, oj, cream,cheese are at:
- 32*F
I looked and checked over 30 different themostats thruout store.

How could I get my frig/freezer to run even lower
and be more like the supermarkets ?
Thanks
 

Last edited by philb00; 06-19-10 at 07:01 AM. Reason: revised
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Old 06-20-10, 12:16 PM
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Any ideas? Anybody ?
How could you make the refrig/freezer colder ?
 
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Old 06-20-10, 02:55 PM
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Most home frig/freeezer should be capable of -10 in the freezer. The problem arises because the door is opened and closed. If you keeep the freezer relatively full, then the mass of froozen food does not gain much heat during a quick access, but if it is not full, then a lot of warm air enters every time you open the door..


32 is too cold for a refrigerator. Milk will freeze right there, and vegies too. The temp in most fridges will vary from top to bottom, front to back , quite a bit. If you set it too cold, you will definitely freeze your milk at the back . about 40 is a setting which will keep your milk through the use-by date.

Modern high end refrigerators have internal compartments with separate temp controls, so you have more flexibility.

If you can't get -10 in the freezer, it may need repair. Unlikely that you could "modify" a properly working system to make it colder.
 
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Old 06-21-10, 04:51 AM
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Must be some way

Thanks - if see my other earlier post, I only
getting these temps regularly
refrig 52*F
freezer 26*F (nothing lower) It was working fine for years.
I took the defrost t-stat completely out and ordered/waiting for a new one - I hope this will fix my "not cold enough" frig/freezer. (ice cream is melting/mushy)
It was replaced once before 4 years ago - it seemd to fix
the same problem then.

But someone out there must have fiddled and got their frig
lower than usual.
I know the milk will freeze at 32*
But... major supermarkets keep their temps like
refrig 32*F
freezer -10*F

How can I get my freezer down to around -10*F like
they do ?
How do they do it for these deep freezers ?

I want my ice cream rock hard not just frozen.
 
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Old 06-21-10, 06:45 AM
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Your refrigerator is broke! Those temps could be anything from loss of freon, to condensor fan or evaporator fan, to temperature control unit.

How old is it? If it is older than 12 years or so, it may not be cost effective to repair.

You really can not "fiddle" with a properly functioning unit to make it colder. Doing so will have adverse side affects, such as shortened life of components, defrost issues, etc. Since there is only one sealed system, the frig. and freezer interact, and messing with one side will affect the other.

Please get it fixed,or get a new one.


By the way, freezer tubs in the grocery store work great because of the laws of physics....the warm air rises and the cold air settles low!
 
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Old 06-21-10, 01:23 PM
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right i know its broke

so that is why Im asking.
I have a new defrost t-stat and timer (least costliest) ordered and hope to get it tomorrow and hope it will fix it.
I dont have a lot of $$ now. It is 1998 refrig. It was repaired
4 yrs ago for same type not-cold enuf prob 4 yrs ago
Cost me $280 just for new t-stat to be put in.
I cant afford to do that again or go buy a new one right now.
---
Just for kicks tho - someone like hvac guy must have fooled
around with old refrig and made it extreme coldd.
(even tho it might not all 100% run properly - like maybe frost/ice up alot and quicker)
Just curious
 
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Old 06-21-10, 01:52 PM
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Make your freezer colder by fixing properly.

The compartment in a home freezer is only designed to hold frozen food for a very short time, not to store anything for any length of time.
Because of the automatic defrost, the fact that you are spilling air from the freezer to cool the fridge part and also that the doors are regularly opened you would need a considerably larger compressor that would raise your power consumption a lot.

If you want colder get a chest type freezer.

In addition to limiting the amount of time the defrost elements run a defrost thermostat prevents your fridge from catching fire should the timer stick................Better fix it soon before your fridge turns into a char-broiler!
Also, by bypassing this control the freezer could be defrosting for a longer amount of time heating up the compartment needlessly.

And please, DON'T START ANY NEW THREADS ON THIS FRIDGE!!!
 
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Old 06-22-10, 02:40 AM
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"By the way, freezer tubs in the grocery store work great because of the laws of physics....the warm air rises and the cold air settles low!"
--
So how is any home fridg different ?
The same laws of physics still apply at home, right ?
Not sure I understand what your saying. (Do the freezer ontop of fridg vs freezer on bottom work better
since easier for cold air to get down to fridg compartment ) ?
--
I know on my fridg since took back panel off - my inside freezer fan is running and I have the defrost t-stat pulled out and have the 2 wires capped off. So when timer kicks on every 8 hrs for 30 mins it does no defrosting right now.
( but at least I give the compressor and its fan a rest a little)
Thanks
 
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Old 06-22-10, 07:47 PM
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►Every time you open the door, all the cold air falls out.
► The freezer is sharing with the refrigerator.

I would like to repeat that you reported temp. of 52 in the refrigerator...26 in the freezer. This is completely unacceptable. Your unit is BROKEN. Get someone in who knows how to fix it.

Now that you shared with us...in one of the THREE threads....that it is a bottom freeezer unit....that still does not make it compare with a grocery store freezer which is a tub completely closed on 4 sides and the bottom. Your drawer is open on the bottom and everytime you open the door, the cold air falls out.
 
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Old 06-22-10, 08:15 PM
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This is getting a bit much for one fridge but I will explain how a commercial freezer is different than a home fridge.

1. A commercial freezer is dedicated to one temperature range which makes it much more efficient than a home fridge/freezer combination.

2. A commercial freezer has a compressor that is sized to properly cool any style of case .
For example: A 12 foot wide commercial closed door ice cream freezer would use about a 2 hp compressor, a 12 foot open display freezer for ice creamwould use up to a 5 hp compressor.

3. Commercial freezers are normally properly maintained by qualified tradesman, mostly because of the value of the product they hold.


We have pretty much beaten this subject to death so get your fridge fixed and please don't start any more threads on this.
 
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Old 06-28-10, 08:06 PM
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Whew...

"In addition to limiting the amount of time the defrost elements run a defrost thermostat prevents your fridge from catching fire should the timer stick................Better fix it soon before your fridge turns into a char-broiler!
Also, by bypassing this control the freezer could be defrosting for a longer amount of time heating up the compartment needlessly."
BAD DEFROST THERMOSTAT
Also set thermostat inside fridge to around 6 and the freezer control to highest letter "colder"
If that doesn't do it then you are low on freon also.
It is not impossible for a fridge to have several problems.
I know the defrost thermostat is BAD as you PM'd me and said there was continuity through it at room temp. Should not be; only below freezing. DO NOT JUMP OUT A DEFROST T-STAT!!!
Fire Hazard.....Just change it.
 
 

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