Trane XL18i Central Air Conditioners

Trane XL18i Air Conditioner Overview

The Trane XL18i is a two-stage air conditioner with an efficiency rating of up to 18.00 SEER. The unit’s Climatuff compressor automatically adjusts itself to provide constant temperatures and quiet operation. An integrated fan with a blade-down design reduces sound levels while improving efficiency, and an aluminum coil resists corrosion while enhancing heat transfer. Full-sided galvanized steel louvered panels with a baked-on powder paint finish and zinc-coated fasteners protect the unit from weather hazards and corrosion, and a DuraTuff basepan is designed not to crack, warp or corrode.

Questions about this model?

Consumer Reviews of Trane XL18i


  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
  • #8 of 24 Trane Air Conditioner
  • 50% of customers recommended

Read Reviews of Other Trane Products

Find ratings and reviews for Trane Air Conditioners, Boilers and more

Read Reviews

Top 10 Air Conditioners

See who made our list of the best Air Conditioners of 2022.

See the Top Products

Find a Certified Heating & Cooling Professional In Your Area

Contact a top-rated local expert to help with all of your home's HVAC needs.

Trane XL18i Air Conditioner Reviews

Showing 1-5 of 6 reviews

"Great unit"

5.0 rating
Very Satisfied

Replaced 17 yo Trane R22 XL19i and TWE airhandler due to leaks at rotor locks on both compressors and age of unit! The unit being replaced only had a start cap and contactor replaced in all it’s years of service down here in SFl. Replaced with a XL18i and tam9 airhandler! Would have gone to the xV20i but due to a move in 2YRS would not be worth it, The new system is providing great comfort and not much difference in energy costs over the XL18i. The nice thing is the temp swings are less since the older xl19i had a delay between switching compressors! The XL18i Tam9 airhandler and 824 thermo are just one nice package,

K Mackey

"Worst AC I have ever Purchased"

1.0 rating
Very Unsatisfied

I purchased this unit with a furnace after our furnace failed. It was supposed to be very high efficiency, but it has made my summer bills go from 370 to 500 per month. When I told the sales guy my summer electric bills were 370, he said they could definitely beat that. They beat it alright, just the wrong way. I can't afford to run it during the summer. It is set on 76 too, which is not very cold. It took them a year to get stage 2 to work. Before that, it would run on the first stage all day, and never kick to stage 2. Now I am stuck with a hugely expensive piece of junk. I will never buy a Trane again. When you call and complain, I am told that there was nothing they could do. Very frustrated.

Regena Martin

Kansas City, MO

"Piece of Shit"

1.0 rating
Very Unsatisfied

Any hvac company that offers you a Trane are Crooks. They are offering them to you because they know how much money they will make off of you. Don't believe the advertising Hype. Their units are a piece of shit. Every year there are problems. We have had to replace the entire condenser coil and all the Freon twice on a three year old unit. Now the bearings are going bad. Do not buy a Trane. We had a contractor grade Janitrol a/c unit last 17 years. I do not think this unit will last more than five years. These people are crooks. Everyone at work that fell for the Trane advertising are spending a fortune keeping these things running. They are junk.


Carrollton, VA

"Trane junk!"

1.0 rating
Very Unsatisfied

This Trane XL18i is 3 years old. Maintained twice a year. I have replaced the compressor & the coils within 4 weeks of each other. I bought Trane because I wanted quality but I am rethinking that because my other Trane XL16i coils failed between the compressor & coil failure of the XL18i. The XL18i parts are under warranty but the labor & Freon have cost me several thousand dollars. To make matters worse the XL6i was not under warranty even though the unit was 6 years old. The XL16i only had a 5 year warranty. If I had known about these issues with these Trane air conditioners I never would have bought them. I won't buy Trane again. My model number on my XL18i is: 4TTX8048A1000AA, this number was not on the list of model numbers.

B. Lowell

Houston, TX

"I'm plenty cool, but it costs"

4.0 rating
Somewhat Satisfied

We've owned this air conditioner for about one year now, and it's gotten us through the most miserable Florida summer in recent memory. Our last air conditioner was on its last legs, so we sprung for a new one. We are looking to sell our home soon, too, and the system needed to be upgraded. This air conditioner will keep you frosty cold through the most hot and humid weather, definitely. It is more than adequate for our home. I am not happy with the cost of running it, however. It costs about $150 per month to run it at 78 degrees, which is not very cool. I believe this unit is somewhat efficient, and that our electricity is quite expensive, but as I failed to research this thoroughly, I cannot be sure. I do wish I had done a bit more studying up on the whole issue. My concerns are only related to the costs of running it. It runs like a top, it's silent, it's freezing cold (when set to freezing cold) and it has required no repairs or maintenance in the year we have had it. I would most likely buy this brand again, but I would do my research on efficiency first next time and so should you.

Largo, FL

Other XL18i Reviews

There are a couple of reviews on sites such as and from homeowners asking for opinions on systems that include the XL18i. Most responses say that before making the decision it’s important to have a load calculation done to make sure the system is properly sized for the house.

XL18i Warranty

Product registration is required within 60 days of installation for maximum warranty coverage. The warranty for the Trane XL18i air conditioner is comprised of the following:

  • 12-year limited warranty on the compressor
  • 10-year limited warranty on the outdoor coil
  • 10-year limited warranty on internal functioning parts

Labor costs are not covered by the warranty. Optional extended warranties which can pay for labor and other costs not covered by the manufacturer’s warranty are available.

HVAC Brands

Learn more about your home's heating and cooling system with our guides, how-to's, FAQ's, tips and more.

Ready to get a quote from an HVAC contractor?

Let us know what type of service you need and we can connect you with a certified local HVAC contractor.

Please enter a valid name

Please enter a valid phone number

Please enter a valid zip code

There are no dealers in this zip code.

Please enter a valid email address

Please select repair or replace

Please select heating, cooling or both