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GC/Master Plumber/Mech
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1,517 Posts
Discussion Starter #1
I have a bottom freezer amana fridge.

Found the defrost heater to close to the evap coil and burned/rubbed a hole in the coil.

I replaced the coil, flushed with nitrogen, evac the system and charged with r-134a

The low side pressure is running about -2 to -3 psi. Amp draw is 1.05.

Has ran for an hour and freezer temp started at 59.9 and dropped to 59.4.

Curious as to what I'm missing??

Any imput would be helpful

Thanks...J
 

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#1 HAWKEYE FAN
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1,903 Posts
how old is refrig? did it have r134 in it originally? Do you have a tap on the high side.
 

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GC/Master Plumber/Mech
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Discussion Starter #3
Fridge is a year old

Had 134 in to start with

No on the high side tap
 

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#1 HAWKEYE FAN
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1,903 Posts
at 59 degree evap temp and -2 psi? Sounds like its under charged, how did you weigh your recharge?
 

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#1 HAWKEYE FAN
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1,903 Posts
correct low side pressures:
compressor kicks on 6-13 pounds
compressor kicks off -2- +2
 

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GC/Master Plumber/Mech
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1,517 Posts
Discussion Starter #7
I weighed the charge in.

I decided to recover the charge, evac again and charge again.

Not sure what went wrong on the first try but I will have to say that I don't think a full charge happened. However today I got 3 3/4 oz of a 4.25 charge into the system and the compressor become really noisy and would not come out of it. Low pressure wouldn't drop below 8 psi.

I think the compressor had run before I got it to long without a charge and damaged the valves.

Today, I ordered a compressor for it.
 

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#1 HAWKEYE FAN
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there is no way an under charged or even no charge damaged your compressor
 

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GC/Master Plumber/Mech
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Discussion Starter #9
That may be true but the compressor is very noisy.

I believe there is something wrong with the compressor.

If not it's just a $60 hick-up.

Thanks for the help so far. I'll post when I replace the compressor.
 
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