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Cost guide

Air Handler Replacement Cost

Replacing the indoor air handler unit — the furnace, coil, and blower assembly in a split system.

Typical range
$2,000–$7,000
Most people pay
$4,000
Service life
15–20 years when matched to the outdoor unit

National cost range

National range, per air handler installed

$2,000 – $7,000

Most homeowners pay around $4,000. The spread is real, not hedging — the drivers below determine which end of it you land on.

Low end
$2,000
Simple access, like-for-like
Typical
$4,000
What most jobs come in at
High end
$7,000
Upgrades, difficult access, code work

What you are actually paying for

Find the row that matches your situation. Quotes that differ wildly from each other usually differ in scope, not in price.

ScenarioTypical cost
Air handler and coil, matched to existing condenserKeeping the outdoor unit; replacing indoor only.$2,000–$4,000
Air handler with ECM blower upgradeVariable-speed blower improves comfort.$2,800–$5,000
Full air handler with heat strips (heat pump)Includes backup electric heat.$3,000–$5,500
Air handler plus duct modificationsPlenum or transition work needed for the new unit.$3,500–$6,500
Matched system — air handler plus new condenserWhen both indoor and outdoor units are replaced together.$5,000–$9,000

What moves the price

In descending order of impact. These are also the questions worth asking a contractor whose quote sits outside the range above.

  1. Matched system requirement

    The air handler should be matched to the outdoor condenser for rated efficiency. Mixing brands or mismatched tonnage reduces SEER and may void warranties.

  2. Coil type

    A cased evaporator coil integrated in the air handler is standard. An uncased coil in a custom plenum costs less in equipment but more in labor.

  3. Blower motor type

    A standard PSC blower is cheapest. An ECM variable-speed blower costs $300 to $600 more but improves comfort and efficiency.

  4. Electric heat strips

    In heat pump systems, backup heat strips in the air handler add $200 to $500 depending on kilowatt capacity.

  5. Accessibility

    An air handler in a closet or attic is standard. A handler in a crawlspace or tight mechanical room adds labor.

Can you do it yourself?

Not a DIY job

Air handler replacement involves refrigerant connection, electrical wiring, condensate drainage, and gas piping (on gas furnaces). Licensed HVAC work is required.

Permits and inspection

A mechanical permit is required. Refrigerant connection is inspected on heat pump and AC systems.
Run the DIY vs. pro decisionCheck a quote you already have

When this cannot wait

  • Blower motor failed — no airflow regardless of outdoor unit status
  • Evaporator coil leaking refrigerant
  • Rust or water damage in the air handler cabinet

Common questions

How much does an air handler replacement cost?
An air handler and coil replacement typically runs $2,000 to $4,500 installed, matched to the existing outdoor unit. Adding an ECM blower or heat strips pushes the total to $3,000 to $5,500.
Can I replace just the air handler?
Yes, if the outdoor condenser is under 10 years old and the refrigerant type matches. The new air handler must be compatible with the existing outdoor unit for rated efficiency. Mismatched systems lose 1 to 2 SEER points.
What is the difference between an air handler and a furnace?
An air handler is the indoor unit in a heat pump or AC system — it contains the blower and evaporator coil but no combustion. A furnace burns gas or oil to produce heat. Heat pump homes have air handlers; gas homes have furnaces.
How long does air handler replacement take?
A straightforward swap takes 4 to 8 hours. Duct modifications or refrigerant line work add time. Plan for a full day if the plenum or transition needs custom fabrication.
Indoor AC unit leaking water — air handler replacement cost?
A clogged condensate drain is $100 to $200 to clear. A cracked drain pan replacement runs $200 to $500. If the coil is leaking refrigerant, air handler and coil replacement runs $2,000 to $4,500. Water damage from an overflowing pan adds $500 to $2,000 in remediation.
Blower motor humming but not spinning — air handler repair cost?
A seized blower motor replacement runs $450 to $1,400. A failed capacitor is $150 to $400. If the air handler is over 15 years old and the motor failed, full air handler replacement at $2,000 to $4,500 is more reliable than a $1,400 motor on aging equipment.
Air handler making a loud noise when the AC turns on — replacement cost?
Banging on startup may be a loose blower wheel ($100 to $200 to secure) or failing motor bearings ($450 to $1,400 replacement). Persistent noise after repair attempts means replacement at $2,000 to $4,500. Do not ignore — a detached blower wheel can damage the housing.
Evaporator coil frozen solid — air handler problem repair cost?
A frozen coil means low refrigerant ($500 to $1,500 to repair leak and recharge) or restricted airflow from a dirty filter (free fix). If the coil is leaking, replacement runs $1,200 to $3,000 for the coil or $2,000 to $4,500 for the full air handler. Shut the system off until thawed.
How much does it cost to replace the air handler but keep the outdoor unit?
Air handler and coil replacement matched to the existing outdoor unit runs $2,000 to $4,500. The new handler must be compatible with the outdoor unit's refrigerant type and capacity. Mismatched systems lose 1 to 2 SEER points. Only viable if the outdoor unit is under 10 years old.
Mold in the air handler closet with a musty smell — replacement cost?
Coil cleaning runs $200 to $400. If mold has penetrated the coil or insulation, air handler replacement runs $2,000 to $4,500. Persistent musty smell after cleaning means the coil is contaminated — replacement is the health-safe fix. Address the moisture source (drain, humidity) to prevent recurrence.

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