I have a 15 year old Carrier condensing unit (38ck030300) which I believe is a 3 ton unit. Due to it's age I was thinking about replacing it this winter since we live in Texas and worry about it failing through the hot summer. I got a cost estimate that was about double what I paid to replace a 5 ton unit two years ago. I thought about buying a unit on line and hiring a tech to come out to install it for me. What would your suggestion be?
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?
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Messy - why not just hook up a regular fan and hook it up to the power line that ordinarily powers the condenser fan.and have it do the blowing until the repair person comes out on Friday. The ideal fan is one of those old floor fans that used to blow air in a 360 direction.
Looks like a 5 ton unit. However, you might be better off finding a R-22 condensing unit to replace the entire outside unit. Reason being, if you just replace the compressor, you get a one year warranty. If you replace the whole outside unit, you get a 5 year warranty. You can replace the outside unit with any manufacturer, as long as it is the same tonnage and type (heat pump/air conditioner/single stage/ 2 stage ...).
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 unit is 2.5 ton system. many units can replace the existing, you can upgrade to a 3ton if you wish without problems or upgraded ducting if enough ducting exist. Brands that will almost fit as is are Payne, Day and Night, Rheem, Ruud.
you have a 3.5 ton unit.The evap will work with a new unit but it will not have the 13 seer performance that the new condencer with matching coil will give you.It is getting and harder to find the old 10 seer units check ebay and craigslist.
First of all, clean your outside coils so that you are assured of good cooling air. The compressors have an overtemp device that is usually internal to protect them against heat. If you have an air compressor use it to blow out the coils good. If the compressor will start, the capacitor is good so it sounds like a cooling problem with the compressor
That is a fairly large difference. It is usually ok to have the inside evap. coil and blower up to 1 ton larger than the outside condenser. That will make the unit slightly more efficient as well as less likely to freeze up on low airflow situations. It is not recommended to install a new condenser on an old evap coil. There has been a lot of changes to the design of the coils in the last little while. For example a 10 year old 2 ton coil may only have 3 cubic feet of volume but a new 2 ton coil may have 4 cubit feet of volume.
There are many factors that may have infulenced the decision on what size condenser to install. Many of which can only be done by visiting the home and doing alot of work, checking the duct sizing bioth supply and return, inspecting the insulation and windows of the home etc. etc. Most of the time that never gets done. You can blame the contractor for not doing a complete check, but at the same time you can blame the customer because many contractors that are that good loose the job to a cheaper bid that did not no any of the research. It is a catch 22 for everyone involved.
There is ALOT more to sizing equipment that many people think, sadly that also includes many HVAC contractors. Way too many people use "rule of thumbs" or flat out "guess".
Sorry for the rant but your queston can only be answered by a good well educated HVAC contractor visiting your home. That type of a contractor is getting hard to find these days in such a price competetive world.