I have a condensor Carrier model 38ck030300. It is old and I cannot read how many tons it is. I probably need to replace it with new. Do you know how many t it is? Which units will be compatioble? Thanks olissim

it is a 3 ton condensor you still can buy r22 freon condensors new but they have nitrogen charge and its expensive to charge I recommend to go with 3 ton goodman condensor which is new 410a puron and also change indoor coil and flush the line set so you dont endure the high cost of new copper lines these new systems come with 10 years warranty and the r22 systems come with only five years

The number you are referring to as your 'model number' is a number I don't recognize; maybe it's the SN or something - I don't know.
But that other number - "38CKC042" -------'is' --- your model number and the size of your AC is 42,000 Btu or 3.5 tons.

They make a special tool that will allow you to remove the schrader valve while loosing only a minimum of refrigerant. One of these tools will run you about 40 bucks.

First off - the 'rule of thumb' is 600' per ton of Air Conditioning. In other words your old unit is a 2 ton unit. So - 2 tons x 600' = 1200'. As you can see if you install the 2.5 ton unit - you will be installing a AC that 'could' cool a 1500 sq ft house (2.5 x 600' =1500 sq ft.). Slightly more than what you need; and the 3.5 ton unit is 'way to big,' (3.5 x 600' = 2100 sq ft.).

Note: fyi - many in the AC business will sometimes refer to tonnage in btu's, i.e. 1 ton = 12000 btu - hence a '2 ton unit' can also be referred to as a 24000 btu unit and vice versa.

So... from the above - you can easily see that "2 tons" of Air conditioning is what is required to cool the 'average' home of 1100 sq ft. "roughly speaking."

Note: it is always best to have a professional 'size' your cooling/heating needs.

One of your questions was could you 'mix tonnage?'

The answer is 'usually you don't mix the tonnage of your outside/inside units.' However, professionals sometimes do (mix the tonnage) in certain situations, and installing a 2.5 ton outside unit with an existing 2 ton inside unit is often done, however, there are some 'tech issues' here and - I would "again" recommend that you call a Service Tech to help you with the sizing/mixing of your cooling/heating needs.

hope this has helped

There should be a nomenclature tag on the exterior of the unit by where the electrical enters the unit. It states the refrigerant type .

Sure but you need ot have an AC man to replace it and vac down the system plust change the dryer/reciever.

If indeed your evaporator (indoor) coil is leaking, the best option IS replace it (it may not even BE repairable). If you live in the USA and your furnace is getting old, a new ultra high efficient SYSTEM that qualifies for the tax credit would probably be a better option (Obama will pay 30%).

567C024RCU In this model number is the # 24. That stands for 24,000 btu's. This is a two (2) ton unit. Has this two ton unit cooled ok in the past? if so replace with the same size. But make sure yo change the indoor coil to match the size "and" efficiancy of the ew unit.

Don't even think about it. This is an industry where you get what you pay for most of the time. Is your system not working currently? If there is a guy willing to install a system you bought off the internet he doesn't belong in this industry. I have gone behind people like that and had to explain to a homeowner how someone did a complete botch on their job and I have to rip it all out and start over. BE VERY CAREFUL if you want to try that. A company's price is usually a reflection of their quality and level of service. When was the last time you ever got anything of the highest quality for the cheapest price?

The model numbers change.You have a 3 ton system.The make and model that you replace it with is not nearly as important as a quality install.Do your homework on picking a contractor that you can trust.Have them do a load calculation to make sure a 3ton system is right for your house.13 seer is the minimum you can get.You need to weigh the projected annual savings of higher seer units against the added cost of having them installed.Again,get a contractor you trust and go with the best warranty.None were stupid questions.