Cost to Replace AC and Furnace at the Same Time in Arlington, TX

Arlington homeowners ask about the cost to replace an AC and furnace at the same time on the hottest week of the year, or on the first cold night after a long cooling season. The outdoor unit died, or the furnace will not stay lit, and someone on the phone offers to change both. The number is hard to judge if you have not bought a full system in ten or fifteen years.

This page is that combined job: what national guides publish, what is actually included, and when leaving the furnace alone is the smaller, correct scope. None of the dollar figures below are a Boost Air price. They are published national ranges. The price for your house depends on the system, the house, and the equipment.

If you smell gas (a rotten egg odor), stop here. Do not flip switches or use a phone inside. Leave the home and call your gas utility or 911 from outside. If a carbon monoxide alarm sounds, or anyone has a headache, nausea, or dizziness that eases outdoors, get everyone out and call 911. Do not collect bids while a gas smell is in the house.

If the air conditioner smells like hot plastic or burning electrical insulation, or a breaker trips again, leave that disconnect off. Do not open the outdoor electrical compartment.

The combined job is not two prices added together

Angi's 2026 guide puts most central AC replacements between about $3,900 and $8,100, with a national average near $6,000. HomeAdvisor's AC replacement range is about $3,900 to $7,900. For a gas furnace, Angi and HomeAdvisor put most installed replacements between about $3,800 and $10,000, with a national average around $7,000 for a mid-size house. High-efficiency furnaces are often quoted higher, sometimes toward $12,000.

Adding those bands together overstates a lot of real houses and understates others. HomeAdvisor's typical band for a whole heating and cooling replacement is about $5,000 to $12,500, and the wider project range it publishes goes above that when the scope grows. Use that band as the sanity check for a full system. Use the separate bands when only one half is being replaced. AC replacement cost in Grand Prairie labels the cooling ranges the same way. They are national industry ranges, not an Arlington price.

A combined visit can cost less than two separate changeouts spaced a year apart. The crew is in the attic or the closet once. The coil comes out once. Haul-away and the permit can be one trip. That is shared work, not a coupon. A bid that is low because it leaves the old coil, skips the permit, or skips the vacuum is not the inexpensive one.

What a full-system quote should include

On most Arlington houses the system is a split: a condenser on a pad outside, a furnace in the attic or a closet, an evaporator coil on the furnace, a line set between them, and ducts that already run through the house.

A complete changeout of both usually includes:

• A matched outdoor unit and indoor coil, not a condenser sitting on whatever coil was already there
• A new furnace sized to the house, with the vent connection spelled out
• A new filter drier, a pressure test, and a deep vacuum before the system is charged
• Refrigerant charged for that equipment
• The electrical disconnect, the breaker, and the wire size confirmed
• A thermostat set up for the new equipment
• Haul-away of the old refrigerant and the old cabinets
• A city permit, with the contractor who pulls it named

If a quote is silent on the coil, the furnace vent, the vacuum, or the permit, ask. Those are how the equipment survives an Arlington summer and the first cold night.

What moves the price

Whether the furnace needs to go. Replace it when it is failing, when the blower cannot support the new coil, or when you are switching to a heat pump. A sound 8-year-old furnace is not a throwaway because the condenser is 15. Ask for the cooling-only price beside the full-system price.

The coil, the refrigerant, and the vent. New systems often use R-32 or R-454B, not the R-410A of the last decade, so the outdoor unit and the indoor coil have to be a pair. AC installation and replacement is quoted as a matched system unless there is a specific reason not to. An 80% furnace uses a metal flue. A condensing furnace needs PVC vents and a drain, which in an Arlington attic can cost more than the difference in the box.

Size, ducts, and the attic. Copying the old tonnage and BTUs is a guess. An oversized air conditioner leaves the house damp. An oversized furnace short cycles on mild winter nights. HomeAdvisor cites about $1,000 to $2,700 for ductwork in its HVAC tables. Heavier work costs more. A coil change in a hot attic takes longer than the same work in a closet, and a bad line set or drain belongs on the quote. Arlington's permit fee should be a line. So should after-hours labor if the house is already without cooling.

When to replace both

Replace both when both are failing, or when the furnace is already near the end of a normal life and the coil has to come out anyway. Leave the furnace when it heats evenly, the heat exchanger is sound, and the blower can move the air the new coil needs. Signs your AC needs to be replaced is the cooling-side list. How long an AC should last in Texas heat is the condenser age band, about 12 to 15 years when it was installed and maintained. Do not borrow that number for the furnace.

When one repair is about half the cost of new equipment, and that equipment is already old, price the replacement before you approve the repair. It is a comparison, not a rule. A failed capacitor on a six-year-old condenser is still a repair.

The install decides the life of the pair more than the badge. Oversizing, low airflow, a bad charge, and an improvised furnace vent are what shorten it. Match the bids on models, tonnage, BTUs, flue type, ducts, permit, and a cooling-only total next to the full-system total. HVAC service in Arlington is the local page. You should see the number after someone has looked, and before anything is ordered.

Free replacement estimates

Talk with a knowledgeable North Texas comfort advisor about your replacement options. Free estimates, no pressure.

Boost Air And Plumbing replaces central air and gas furnaces in Arlington, Grand Prairie, Mansfield, Dallas, Fort Worth, and nearby communities. We do not install boilers. See our AC installation and replacement service and HVAC service in Arlington. Call (817) 612-9107 or book online. Hours are Monday through Saturday, 8am to 7pm, with after-hours and Sunday emergency appointments available.

Frequently asked questions

What is the cost to replace an AC and furnace at the same time? HomeAdvisor's typical band for a whole heating and cooling replacement is about $5,000 to $12,500. That is a national industry range, not an Arlington price and not a Boost Air quote. It is also not the sum of a separate AC bid and a separate furnace bid. Shared labor, one permit, and one attic or closet visit change the job. Your price depends on the system, the house, and the equipment.

Is it cheaper to replace the AC and the furnace together? Sometimes the combined visit costs less than two separate changeouts, because the crew is already there, the coil comes out once, and the permit is one permit. It is not automatically a discount. If the furnace is sound, replacing it "while we are here" can add money you did not need to spend. Get a cooling-only price and a full-system price in writing and compare the lines.

Do I have to replace both if only the AC failed? No. Replace the furnace when it is failing, when you are switching to a heat pump, or when the blower cannot move the air the new coil needs. Leave a sound furnace in place. New outdoor units often use a different refrigerant than the R-410A systems of the last decade, so the indoor coil usually has to change even when the furnace stays.

Why is an Arlington attic more expensive than a closet? The equipment price is only part of it. A coil change in a hot attic takes longer. A condensing furnace needs a condensate drain and plastic intake and exhaust pipes, which can be a long path in a one-story house. A line set that is the wrong size has to be replaced. Access and those repairs belong on the quote as their own lines.

Does the brand matter more than the install on a full system? No. Sizing, a matched coil, the refrigerant charge, airflow, and the ducts decide how long the equipment lasts. Two systems with the same badge will age differently if one was commissioned carefully and the other was oversized and hooked to crushed attic ducts. Ask how the tonnage and the furnace BTUs were chosen.