What replaced the Carrier 24SPA6?
Checked against 24SPA6 Performance Series Single-Stage Air Conditioner with Puron Refrigerant — Product Data, September 2026.
The 24SPA6 is an R-410A air conditioner — Carrier's Performance tier, single-stage. R-410A equipment stopped being manufactured after 31 December 2024, so there is no new one of these to buy — but that does not mean your only option is a whole new system.
The model Carrier points you at
Is this your unit? 24SPA6 is a family. The data
plate carries one of these numbers: 24SPA618W003 , 24SPA624W003 , 24SPA630W003 , 24SPA636W003 , 24SPA642W003 , 24SPA643W003 , 24SPA648W003 , 24SPA649W003 , 24SPA660W003 , 24SPA6610W003 .
The copper you already have
What the 24SPA6 was installed with, size by size. The successor’s own diameters have not been read yet, so this page cannot compare them for you.
| Model | Capacity | Liquid line OD | Suction line OD |
|---|---|---|---|
24SPA618 | 1.5 ton | 3/8" | 3/4" |
24SPA624 | 2 ton | 3/8" | 3/4" |
24SPA630 | 2.5 ton | 3/8" | 3/4" |
24SPA636 | 3 ton | 3/8" | 7/8" |
24SPA642 | 3.5 ton | 3/8" | 7/8" |
24SPA643 | 3.5 ton | 3/8" | 7/8" |
24SPA648 | 4 ton | 3/8" | 7/8" |
24SPA649 | 4 ton | 3/8" | 7/8" |
24SPA660 | 5 ton | 3/8" | 1-1/8" |
24SPA661 | 5 ton | 3/8" | 1-1/8" |
Whether your indoor coil, your copper and your furnace can stay is a Carrier rule rather than a rule about this model: the Carrier rules page states all three, with the documents behind them.
A like-for-like R-410A outdoor unit, labelled "For Service Only", is still a legal option in most states and keeps your existing coil — the phase-out guide sets out when that route closes .
How Carrier listed the 24SPA6
| Refrigerant | R-410A |
|---|---|
| Tier | Performance |
| Compressor | single-stage |
| Region | All regions |
| Coastal option | Not listed |
What the documents say about this model
ManufacturerCarrier's product data for the 24SPA6 rates every capacity in the family on a 3/8 inch liquid line. The vapour line is what changes with capacity: 3/4 inch at 1.5, 2 and 2.5 tons, 7/8 inch from 3 through 4 tons, and 1-1/8 inch at 5 tons.
ManufacturerAt the two 5 ton sizes the service valve's vapour connection is 7/8 inch while the rated vapour line is 1-1/8 inch. The fitting at the unit and the copper running to it are not the same diameter on this family, so the number stamped near the valve is not the line size.
ManufacturerCarrier allows the 24SPA6 up to 250 feet of total equivalent line length, with the outdoor unit up to 200 feet above the indoor unit or up to 80 feet below it. The piping tables add that actual length may not exceed 200 feet whatever the equivalent length works out to.
ManufacturerCarrier sells this family as ten catalog numbers covering seven nominal capacities: 42 and 43 are both 3.5 ton, 48 and 49 both 4 ton, 60 and 61 both 5 ton. The higher number of each pair is the higher-efficiency build — a larger condenser coil face area and a slower condenser fan — and both members of a pair take the same line sizes.
ManufacturerA thermostatic expansion valve is required beyond 50 feet of total line length, or beyond 20 feet of vertical separation between the units. The family leaves the factory charged for 15 feet of 3/8 inch liquid line, and Carrier requires the charge to be adjusted for any other length or diameter, at 0.60 ounces per foot for 3/8 inch line.
Where the mapping comes from
DistributorCarrier Enterprise's 2025 equipment transition guide lists the 24SPA6 as an R-410A Performance-tier air conditioner: a single-stage unit, sold for all regions. No coastal option is listed. The guide's Puron Advance column for this row is 26SPA6.
Read next
- Check your own swap against the 26SPA6 Your coil and your line diameters, against what Carrier publishes for the unit you are being quoted.
- The Carrier rules, with sources All three answers for the range, and every document behind them.
This is a starting point, not an approval. Everything here is read from published manufacturer documents and dated, but only the licensed contractor who signs your installation can approve a specific system for your home and your local code. Take the citations on this page to them and ask.