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older fridge efficency?


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15 replies to this topic

#1 gregs

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Posted 27 March 2013 - 11:34 AM

I have an older (90's) 22 cuft top freezer fridge and have a question regarding its running efficency. When the temperature in the house is in the low 70's or below the fridge doesnt run as much. But when it hits about 78 or above it seems to run almost continuiously except for when its in the defrost mode. The inside of the fridge and freezer stays cold and I dont have a problem with it getting warm inside. It doesnt seem like its a operation problem for the cooling system but more of a issue from heat gain / cold loss. I was just wondering if this is normal operation for this vintage fridge



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#2 Cactus Bob

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Posted 27 March 2013 - 12:03 PM

Why not just ask us the meaning of life ?

This is a really tough one

 

Fridges do loose just about everything over time

just like everything else it just wears out

 

Advancements in fridgeoligy reduce the energy needed to run the fridge .

Sometimes these "advancements " make the fridge expensive to buy ,or repair

 

so you have to ask yourself "how much extra energy is my old fridge using per month " ?

let's guess ....$5.00 ....5x12month = $60.00 per year ......  A new regular fridge is around $700.00

so 60 /700 = 11.6 years , until you break even , if there are no repairs , with the way fridges are made today there's a good chance the replacement fridge will not even be around that long

 

SO

 

How much does the running bother you ?

would you like a new fridge ?

do you have the money right now to replace  ( please don't use credit , i beg of you !)

 

or

 

should you just wait for a major breakdown and take the repair money's and replace instead


SORRY ABOUT THE SPELLING , I FIX GREAT , I DON'T SPELL WELL

#3 Samurai Appliance Repair Man

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Posted 27 March 2013 - 12:16 PM

Advancements in fridgeoligy reduce the energy needed to run the fridge .

 

 

Spoken like a true Sublime Master of Appliantology!   :dazzler:  :thumbsup:



#4 gregs

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Posted 27 March 2013 - 12:19 PM

Just curious if this is "normal" operation. You know like the telephone joke "Is you fridge running? You better catch it!" I am not looking to replace it until it dies and the extra running doesnt bother me. I would think the only reason its running more is because of the heat gain from the higher ambient temperature, not because the refrigerant system cant keep it cold.



#5 RegUS_PatOff

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Posted 27 March 2013 - 12:48 PM

... It doesnt seem like its a operation problem for the cooling system

won't know for sure until we see a picture of the frost pattern of the Freezer Evaporator Coils


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#6 Cactus Bob

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Posted 27 March 2013 - 01:17 PM

the problem is most likely a loss of compression in the compressor

this happens after years and years of use

 

think of it like this

you(I) have a new car , you have a steep mountain that you drive up once a week

you keep the same car 30 + years and drive it 321,234 miles

you (I) now have to keep the gas(diesel) petal to the floor on parts of the mountain just to keep up with traffic

there is nothing a machanic can put his finger on as a reason why the loss of power on steep hills

it runs just great , like it always did

 

Is there something wrong with the car ?

 

sure there is

 

should i fix it ............

 

PS: the $2,000.00 car needs a $6,000.00 engine !!

 

now

 

should i fix it ?


Edited by Cactus Bob, 27 March 2013 - 01:29 PM.

SORRY ABOUT THE SPELLING , I FIX GREAT , I DON'T SPELL WELL

#7 gregs

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Posted 27 March 2013 - 01:44 PM

Understood. Would the frost pattern tell if it was a compressor problem or possibly a low charge problem?



#8 Cactus Bob

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Posted 27 March 2013 - 02:13 PM

frost pattern will tell you if your low on freon

 

but I do not feel your problem is freon related

 

Freon tends to expand when temps go higher and reduce volume when it's cold

so

if you where low on freon the fridge would run a lot or not even cool properly when room temps fell

and

work better or even correctly when room temps where higher

also

a low charge may also make the defrost not work properly because of where the defrost thermostat is mounted, and your system would be freezing up

 

 

PS: A weak compress will still have a good frost pattern , in most cases


Edited by Cactus Bob, 27 March 2013 - 02:18 PM.

SORRY ABOUT THE SPELLING , I FIX GREAT , I DON'T SPELL WELL

#9 gregs

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Posted 27 March 2013 - 03:42 PM

Thanks for the help



#10 gregs

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Posted 28 March 2013 - 08:16 AM

Just a thought. Could it be overcharged? I know the system only holds around 6 oz's. I bought the fridge used from a small appliance dealer a few years ago and he had fixed something that required it to be recharged. The compressor looks original and he soldered in a line tap. Not sure what the original problem was.



#11 RegUS_PatOff

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Posted 28 March 2013 - 10:01 AM

... see a picture of the frost pattern of the Freezer Evaporator Coils


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one of my video productions: “Easter Seals: Walk With Me”

every day is Down Syndrome Awareness Day
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#12 gregs

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Posted 28 March 2013 - 11:23 AM

I will see if I can get a picture. Have to unload the freezer to get the panel out. Probably needs cleaned out anyhow.



#13 Cactus Bob

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Posted 28 March 2013 - 11:41 AM

to check for overcharge

 

make sure compressor has run for at least 10 mins with the door closed and is down to normal temps

 

look at the larger pipe or line going into the compressor

 

do you have any ice or frost forming on the exposed line

 

if you do your overcharged

 

it's that simple


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#14 J5

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Posted 28 March 2013 - 05:16 PM

to fllow cactus bob's maths quiz

 

i have been throuh this with 15 yo my single freezer

 

its power hungry

 

using 3.9kwh per day so 1453kwh per year

 

still a current model

and a new one is rated using 559 kwh

 

our electricity is expensive 26.675 c/kwh

 

so its costing $380 per year instead of $150

 

a new one cost $1096 so just over 4 year payback and the will have it

for the next 10 years

 

problem is what happns if it dies andi lose all the food ??

 

I reallly not need the extra freezer anymore so will be getting rid of it soon

and saving $380 a year on power and since my yearly power is about $1200 thats a big

chunk saved



#15 gregs

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Posted 29 March 2013 - 11:42 AM

Checked the compressor line and its cool, not cold or frosty. I would say its a little cooler than room temperature.



#16 Cactus Bob

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Posted 29 March 2013 - 12:31 PM

Gregs :  sounds good , just what your looking for

not to much , not to little , just right


SORRY ABOUT THE SPELLING , I FIX GREAT , I DON'T SPELL WELL




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