Question about Goodman Manufacturing Goodman CAPF3642C6 Air Conditioner 3 to 3.5 Ton W 21 x D 21 x H 22 Cased Evaporator Coil

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What is the correct size for evaporator coils piston ?

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.078 is Shipped with Coil
Note: For a properly matched system and piston sizing information, refer to Goodman piston kit chart of the corresponding Goodman

Posted on Dec 29, 2013


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Location of #1 piston on 2005 ford taurus

There are three variations of the Taurus engine. All are 3.0L in size. Leave it to Ford to make things confusing. All have the same piston location, although one model has coil packs and the other has coil-on-plug. Here is a diagram showing the piston position and firing order.


Feb 13, 2016 | 2005 Ford Taurus

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Too large of a metering piston in the indoor coil during cooling mode operation will cause the indoor coil to flood with refrigerant. True or False

That's correct. If the piston opening is too large it will allow more frozen through than designed and flood the evaporator coil.

Jun 09, 2015 | Amana PTH123B25AJ Heat Pump Air...

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What is the A-coil that is compatible with furnace model KG7SC072D24B?

Looking at the model # it appears that you may have a 2 ton unit. Evaporator coils come in different sizes -

You should be able to get the correct size by providing the A/C repair company with the name of the manufacturer and the Model Number.

Generic coils, should you need one because yours is no longer being manufactured, do come in all different sizes.

I don't know if you want to replace the evaporator coil or have a service company do it. But if you do there are some things you need to know.

If the unit is an older unit the evaporator coil along with the box it sets in needs to be replaced because the drain pan is probably rusted out.

Additionally the box the new coil sits in is is going to be different in size then the original.

So a transition will need to be made from the furnace to the new A-coil box.

So with all that being said - if you have a credible A/C company replacing the coil you won't have any problems with them finding a replacement coil. They are in the business of doing this type of work and come across this situation all the time.

Oct 06, 2014 | Heating & Cooling

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How does ac evaporative coil with piston work?

the evaporater coil's piston acts as a orfice. the size of the piston hole allows a certain amount of refrigerant through at design pressure. it produces a designed temperture drop at designed cfm of air across it.

Jun 19, 2014 | Goodman Heating & Cooling

1 Answer

Piston size for 3ton indoor coil

if you have a 3 ton condensor it is .074. the piston is sized according to mfg. instructions for condensor

Jun 04, 2014 | Goodman Heating & Cooling

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Does the orifice, which needs to be installed in the inside unit of an a/c for a house, come with the outside condenser? I had an a/c system installed and an orifice was never installed. the original...

The orifice is the metering device inside the evaporator coil and comes installed from the factory in the coil itself. Some condensers do come with orifices taped to the side of the unit, but they only do that to ensure you have the right size orifice. Sometimes you will have a 3 ton evaporator and a 2.5 ton condenser. In this case you want to change the orifice so that it meters the refrigerant correctly. But if you have a 3 ton condenser and a 3 ton coil, which is normal, you don't have to do anything. So to answer your question, your coil already came with a orifice inside and nothing needs to be done unless there are two different sized units as described above. Hope I didn't bore you too much and helped you with your question!

Aug 19, 2010 | Goodman CKL60AR60 Air Conditioner

1 Answer

Coil piston

If you purchased it as a package the right piston may already be installed in the indoor Evaporator coil. When shipped the extra piston if needed is packaged with the outdoor section condensing unit.

May 17, 2008 | Goodman Heating & Cooling

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