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Full Time Heating and Cooling · Watertown, MN

AC Replacement: Honest Cost, Right System, No Pressure

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AC Replacement: Honest Cost, Right System, No Pressure
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What Drives the Cost of a New AC Unit

Details below
AC replacement pricing depends on more than just the equipment. Here are the factors that move the number most.

System Size and Tonnage

A 1.5-ton unit for a small home costs significantly less than a 4-ton system needed for a larger two-story. Tonnage is calculated from your home's actual load, not a rule of thumb. Wrong-sized equipment fails early and performs poorly the whole time it's in service.

Efficiency Rating (SEER2)

Higher SEER2 ratings mean lower operating costs over time, but higher upfront equipment cost. Whether the payback pencils out depends on how much you run your AC and your local utility rates. We'll give you the straight comparison so you can decide.

Ductwork Condition

A new AC unit paired with leaky or undersized ducts won't perform the way the spec sheet says it will. If the existing ductwork has significant issues, correcting them adds to the project cost. We'll tell you what we find before the work starts, not after.

Electrical and Refrigerant Line Condition

Older systems running R-22 refrigerant can't be refilled at a reasonable cost anymore. If your existing system uses R-22, switching to a new unit also means upgrading the refrigerant lines. We assess this during the diagnostic visit so there are no surprises on installation day.

Equipment Brand and Warranty Coverage

We install AirQuest equipment. It's not the most marketed brand name in the industry, but it's built on proven Carrier platform engineering and carries strong warranty coverage. You're not paying extra for a logo. As an AirQuest Elite Dealer, we back qualifying installations with two additional years of No Hassle Replacement coverage.

Access and Site Conditions

A standard exterior pad installation takes less time than a rooftop unit or a system in a tight mechanical room. Labor cost reflects the actual conditions on your job, not an average from somewhere else.

When Repair Stops Making Sense

The only way to know is a real diagnostic visit, not a phone estimate. A 12-year-old system with a failed compressor is almost always a replacement. A 12-year-old system with a bad capacitor that costs $150 to fix is not. We'll tell you what's actually wrong, what it will cost to fix, and how that compares to what a replacement would run. Then you decide. We don't push either direction. If you want a second opinion on a replacement quote you've already received, we offer that too. Our cooling services page covers the full scope of what we handle if you want to see the broader picture before calling.

How the Installation Day Works

The same two-person installation crew handles every job. Not whoever is available, not a rotating roster of subcontractors. The same people, every time. That matters because accountability lives in familiarity. They know how the work is supposed to go because they've done it together, consistently. On installation day, you'll receive a confirmation message and a reminder ahead of the appointment. When the crew is on the way, you get a text with the technician's name and photo. We arrive within the scheduled window, not sometime that afternoon. The crew removes the old equipment, installs and wires the new system, checks refrigerant charge and airflow, and walks you through the new equipment before they leave. Jason inspects every completed installation personally. If you're also considering replacing your furnace at the same time, check out our furnace installation page. Pairing the two installs in a single visit often reduces total cost and labor time.

Why We Install AirQuest and Not a More Familiar Brand

We get asked about this. AirQuest isn't a household name the way some competitors are, and we're not going to pretend otherwise. What it is: equipment built on the same platform as Carrier, with strong manufacturer warranty coverage and dependable performance across Minnesota summers. You're not paying for a name that gets advertised during NFL games. If you register the equipment within the required window, many AirQuest systems qualify for a 10-year parts limited warranty plus a No Hassle Replacement Limited Warranty. As an AirQuest Elite Dealer, Full Time extends that No Hassle Replacement coverage by two additional years on qualifying installs. That's real coverage, not a marketing line. We chose AirQuest because it performs well, holds up in the field, and gives our customers solid warranty protection without inflating the equipment cost.

Schedule Your AC Replacement Estimate

Our technicians aren't paid to recommend replacement. If repair is the right call, that's what we'll tell you. If replacement makes more sense, we'll explain why and give you a straight number. Call or text (952) 847-3387 to set up a diagnostic visit. We serve the Twin Cities southwest metro and surrounding communities. Check the areas we serve page to confirm we cover your location.

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FAQ Common questions

Frequently Asked Questions

Answers below
What is the average cost to replace an AC? +
A central AC replacement is priced by system size, efficiency rating, and whether ductwork or electrical work is needed alongside the equipment swap. Single-stage units in smaller homes cost the least. Two-stage or variable-speed systems in larger homes with ductwork corrections cost the most. Every job is different. Contact Full Time Heating and Cooling for an accurate estimate.
What is the $5000 rule for AC? +
It's one possible starting point, not a rule: multiply the repair cost by the system's age in years, and if the figure comes out high, replacement may be worth considering. Treat it as a rough sanity check rather than a decision. The actual condition of the system matters far more than the arithmetic — a real diagnostic tells you what a formula can't.
Is it worth fixing a 20 year old AC unit? +
Rarely. At 20 years, the efficiency gap alone between your existing unit and a current SEER2-rated system likely costs you meaningful money every cooling season. Add the fact that R-22 refrigerant, which most systems that old use, is no longer manufactured and costs significantly more to source when available. A failed capacitor on a 20-year-old unit might still be worth fixing. A failed compressor almost certainly isn't. We'll give you the honest breakdown.
How much is a new AC unit for a 2000 sq ft house? +
A 2,000 square foot home in Minnesota typically requires a 3-ton system, though proper load calculation can shift that up or down based on insulation quality, ceiling height, window area, and sun exposure. Ductwork repairs, electrical upgrades, or refrigerant line replacement all add to the installed cost of a 3-ton system. Every job is different. Contact Full Time Heating and Cooling for an accurate estimate.
How long does a central AC replacement take? +
Most standard central AC replacements take four to six hours from the time the crew arrives to the time they leave. That includes removing the old condenser and air handler components, installing and wiring the new equipment, pressure testing the refrigerant circuit, checking airflow through the system, and walking you through the new unit. Complicated jobs with ductwork modifications or difficult access take longer. We don't leave until the system is confirmed running correctly.
Does replacing an AC improve indoor air quality? +
A new AC unit doesn't directly improve air quality on its own, but the installation is a good opportunity to evaluate your filtration setup. Older systems often have poorly fitting filter housings or inadequate MERV ratings that let particulates bypass the filter entirely. If indoor air quality is a concern in your home, we can pair a new installation with upgraded filtration or other indoor air quality solutions that work with your new system from day one.
What warranty comes with an AirQuest AC installation from Full Time? +
Most AirQuest systems qualify for a 10-year parts limited warranty when registered within the required window after installation. Qualifying products also include a No Hassle Replacement Limited Warranty from the manufacturer. As an AirQuest Elite Dealer, Full Time adds two additional years of No Hassle Replacement coverage on qualifying installations beyond what the standard manufacturer warranty provides. We handle the registration process and walk you through what your specific system covers.

Our promise

If we can repair it, we will.

No unnecessary replacements.You get the fix, not the invoice we would rather write.

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