If your AC is old, loud, or failing every summer, you may be thinking about a new one. That is a big step, especially the first time. This page explains what replacement means, how providers decide on a system, and what a fair quote should show.
Mofactor Heating & Air is a referral service. We do not install anything. We connect homeowners across the San Antonio area with independent local providers in our network who handle heating and cooling work. You can ask questions, compare written quotes, and decide at your own pace. There is no obligation, and nobody should rush you into a choice.
Is it time for a new AC?
You may be here because your cooling quit on a hot, sticky afternoon. That is stressful, and it is normal to wonder if the unit is worth saving. A provider can look at the system and tell you if a repair makes sense. If you need emergency AC repair first, that is a separate step, and many providers can talk you through both options.
Signs your AC may need replacing
One warning sign alone does not mean the unit is done. Several together often do. Watch for these:
- The system is more than 12 to 15 years old.
- Repairs are getting more frequent and more costly.
- Rooms feel clammy even when the AC runs all day.
- Your power bills creep up with no change in habits.
- The unit is loud, or it short cycles on and off.
- It uses an older refrigerant that is getting harder to find.
A simple repair-or-replace rule of thumb
Many providers use a plain test. Multiply the repair price by the age of the unit in years. If the number is far above the price of a new system, replacement often makes more sense. It is only a guide. Ask the provider to explain their thinking in simple words.
Types of cooling systems
Most homes use one of a few setups. Knowing the names helps you follow a quote.
- Split central AC: an outdoor unit plus an indoor coil, tied to your ducts. This is the most common type.
- Heat pump: cools in summer and can also warm the house in our mild winters.
- Package unit: everything sits in one outdoor cabinet. Some homes use these.
- Ductless mini-split: wall units with no ducts. Good for additions or rooms with weak airflow.
Why proper sizing matters in a humid climate
Bigger is not better. An oversized unit cools the air fast, then shuts off before it pulls moisture out. The house feels cool but sticky, and that can invite musty smells. A unit that is too small runs nonstop and still struggles on the hottest days.
A careful provider measures your home, checks the windows, insulation, and ducts, and runs a load calculation. Be wary of anyone who picks a size by looking at the old unit alone.
What an AC installation includes
A full job is more than swapping a box. Ask that your written quote list each of these:
- Removing and disposing of the old equipment
- New outdoor unit, indoor coil, and refrigerant lines
- A level pad for the outdoor unit
- Electrical connections and a new disconnect if needed
- A drain line for condensation
- A new thermostat, if included
- Permits and inspection, where your area requires them
- Startup testing and a walk-through
Matching the system to your home
Homes here vary, and the setup should fit yours. Many slab-on-grade ranch homes have the air handler in a hot attic. Attic heat wears on ducts and can leak cool air before it reaches a room. A provider may suggest sealing or insulating ducts along with the new unit. Older pier-and-beam houses may need different duct routes under the floor.
An indoor coil and outdoor unit should also be made to work together. A mismatched pair can lose efficiency and wear out sooner.
Efficiency in plain terms
You will see a rating called SEER2. A higher number means the unit uses less electricity to cool your home. In a long, hot season, that can show up on the bill. A higher rating usually costs more up front, so ask for the price and the expected savings side by side. Some utilities and programs offer rebates, so ask the provider what applies in your area.
Think about timing and storm season
If your unit is limping along, planning in spring can feel calmer than choosing in a heat wave. Heavy downpours and tropical storms can also bring power surges. Ask whether surge protection makes sense for the outdoor unit. If you are also weighing furnace replacement near me for the cooler months, a provider can often quote one HVAC service visit that covers both.
Questions to ask the provider
Ask before you sign. Good answers are clear and written down.
- Will you do a load calculation? A good answer is yes, with real measurements.
- What brand and model are you quoting? You should get exact names and numbers.
- Who handles permits? The provider should take care of them.
- What does the warranty cover, and for how long? Ask to see it in writing.
Red flags include pressure to decide today, a price with no written details, a very low bid that skips the load calculation, and a request for full payment up front. Cool house, calm mind starts with a provider who is happy to answer every question.
What's Included
Old Unit Removal
The provider takes out the old equipment and hauls it away, so you are not left with it.
Sizing Check
Measurements and a load calculation help pick a unit that fits your home.
New Equipment Setup
Outdoor unit, indoor coil, lines, and wiring are connected and set up properly.
Testing and Walkthrough
The provider tests airflow and cooling, then shows you how the system works.
What a new AC typically costs
Prices depend on home size, system type, duct condition, and local rates. These are typical U.S. ranges only. Always get a written quote that lists every item before you agree to work.
| Item | Typical range | Notes |
|---|---|---|
| Full central AC replacement | $5,500 – $12,000 | Outdoor unit and indoor coil; size and efficiency change the price |
| Outdoor unit only | $2,500 – $6,000 | Only works if the indoor part is a good match |
| Ductless mini-split (one zone) | $3,000 – $7,000 | Each added room unit raises the total |
| Duct repair or sealing | $500 – $3,500 | Often worth it with hot attic ducts |
| Thermostat upgrade | $150 – $600 | Smart models cost more |
| Permit and inspection | $50 – $500 | Depends on local rules |
How It Works
Tell us about your home
Share a few details about your current system, your home, and what has been going wrong.
Get matched with providers
A local provider in our network reaches out to talk through your options.
Compare written quotes
Review the equipment, labor, and warranty details, and ask about anything unclear.
Choose and schedule
Pick the provider you trust and set a time that works for your household.
Why Call Mofactor Heating & Air
Plain answers before pressure
We explain the basics first, so you can talk to providers without feeling lost.
Independent providers
Providers in our network run their own businesses and do the actual work.
Written quotes
Compare itemized quotes side by side and take your time deciding.
No obligation
Asking for an estimate never commits you to hire anyone.
Other Services
Need ac installation & replacement services in San Antonio?
Tell us what your system is doing. A local provider in our network can follow up with next steps. Request an estimate with no obligation, or send a note to contact@mofactor.living.
AC Installation & Replacement Services FAQ
How long does an air conditioner last?
Most central AC systems last about 12 to 15 years. Hot, humid climates and heavy use can shorten that, while regular maintenance can help the unit last longer.
How do I know if I should repair or replace my AC?
Consider age, repair cost, and how often it breaks down. If the unit is over 12 years old and repairs keep adding up, a provider may suggest replacing it. Ask for both prices in writing.
How long does an AC installation take?
Many standard swaps take about one day, but it varies. Ductwork changes, a new electrical connection, or permits can add time. Ask the provider for a schedule before you agree.
Get in touch
Tell us what your system is doing. A local provider in our network can follow up with next steps. Request an estimate with no obligation, or send a note to contact@mofactor.living.
No obligation