Sweating Evaporator sign of Future leakage?

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Old 08-24-19, 09:04 AM
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Sweating Evaporator sign of Future leakage?

Hello
I know that evaportor sweating is a sign of some icing, which apparently caused leaks in a year old unit. But maybe it was something else they did not give me a good answer.

They just replaced our evaportor coils after only one year of use. The new coils sweats alot. See attachment. Is this a sign that this coil may also go bad and start leaking in another year? A definitive sign or just a low maybe sign.

I know one unit is a 1/2 ton larger then the other. Probally the inside unit is 1/2 Ton larger. BUT if so, would it not sweat and keep up with the outside unit easier if it is larger?

Trying to decide how serious this is given that next year the unit will be out of the labor warranty.

Did they just fix the symptom y replacing the evaportaor and not the cause?

There is somedfference of opinions on this topic. Some say that the inside unit being a 1/2 ton larger is not a big deal. Others disagree.

The prior lenox unit hardly ever sweat

Thanks
Tim

Thanks
Tim
 
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Old 08-24-19, 09:24 AM
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The entire unit is called an air handler. The evaporator is the coil inside the unit. The primary purpose of that coil is to extract heat.... and moisture..... from the air. In that process it gets very wet and the water runs down to the drain. The air handler itself should not sweat. That would be a sign of poor insulation.
 
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Old 08-24-19, 03:23 PM
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hello and thanks PJ.

Maybe the older unit did not sweat much cause it was not working well or very inefficent. Our bill went down about 200 a month after the new unit was put in.

Just do not wish to see the evap coils go again in only a year
 
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Old 08-25-19, 04:28 AM
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So which is it?
Do you mean the coil inside the air hander is sweating or the outer surface of the air handler?
Is condensation on ther coil icing over?
Why exactly did they replace the coil?
 
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Old 08-25-19, 07:52 AM
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Hi, what exactly was leaking , filter is clean, and all the registers are open and good air flow from them?
Geo
 
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Old 08-25-19, 04:07 PM
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Hello

The evaporartor coils have been replaced after only one year of use. As it started leaking alot of coolant. It did sweat before they replaced it. So The coils are most probally still causing the sweating on the cover of the air handler. I do not wish to see another coil go bad after the labor warranty runs out.

All the obvious things where checked. It took two different technicians to check the unit out before they found the leakage.

 
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Old 08-26-19, 04:28 AM
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Ok.
You have a couple of things going on.
Based on what you have said it sounds like the evaporator coil has been replaced because of a refrigerant leak.
This has no connection whatsoever with condensation forming on the air handler.

The sweating on the cabinet has several possible causes:
The system could be oversized causing the discharge air temperature to drop too low which could be colder than what the cabinet insulation was designed for.

It is possible that there is a restriction in the supply air ducting or the air filter is dirty or is a high efficiency type reducing airflow which in turn will lower supply air temperature.
The fan speed is too low also causing low airflow.

The above causes in addition to low supply air temperature could be causing the evaporator coil to freeze over and form a layer of ice on the coil.

You also said: "The prior lenox unit hardly ever sweat".
There shoud be no condensation forming on the air handler or ductwork at any time and if it does then there is likely a design problem that may have existed before the system was replaced.

We can speculate all day long but can not see what you are seeing.
You really need to get the company that replaced the system to come back and see what is going on and to suggest a solution to fix it.
 
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