Carrier FK4DNB006000AAAA fan coil Parts

To look up the model number for your Carrier fan coil (air handler), find the unit’s rating plate (data tag) and match the printed model number exactly, character for character. For this parts page, the model number you would use is FK4DNB006000AAAA.

Where to find the model number on a Carrier air handler

On most Carrier air handlers, the rating plate is on the cabinet, often:

• Inside the front access panel (blower or control compartment)
• On the side of the cabinet near the electrical/control area
• Near the return air opening or filter rack area
• Occasionally on the inside edge of the door/panel you remove

What to write down (so parts match)

We recommend copying the information exactly as shown on the tag:

• Model number (this is what you search with)
• Serial number (helps confirm the exact production run)
• Electrical ratings (voltage and phase)
• Accessory kit numbers (if listed)

Quick check: model number vs. serial number

Item	What it’s used for	Example format
Model number	Identifies the equipment design and parts list	FK4DNB006000AAAA
Serial number	Identifies the specific unit built	Letters and numbers (varies)

How to use the model number to get the right parts

Once you have the model number, use it to pull the correct parts list and diagrams. For Carrier FK4DNB006000AAAA, common maintenance and repair items you may see include:

• Central air conditioner air handler air filter 317659-405
• Mounting hardware such as brackets
• Control components such as a circuit board

Why it matters

Carrier air handlers can look similar across multiple series, but small model-number differences can change the correct air filter size, control board compatibility, and mounting hardware. Matching the full model number prevents ordering a part that will not fit or wire in correctly.

Ordering tip

We recommend ordering directly from the parts list for model FK4DNB006000AAAA, or searching by model number on Sears PartsDirect if you are working on a different Carrier unit.

Last updated: February 2026

Yes. Carrier makes air handlers (also called fan coils) for residential HVAC systems, and your Carrier FK4DNB006000AAAA is one of those air handler models. Air handlers work with your outdoor AC or heat pump to move conditioned air through your ductwork and help manage airflow and filtration.

What an air handler does in your HVAC system

An air handler is the indoor unit that typically includes the blower, evaporator coil area, and controls. In normal operation, it:

• Circulates air through the home using the blower motor
• Supports cooling (and heat pump heating) by moving air across the indoor coil
• Holds the air filter to protect the blower and coil from dust buildup
• Uses a control board to manage fan speeds and system calls

Common Carrier air handler parts you may replace

For the FK4DNB006000AAAA, these are examples of parts we commonly see customers shop for when airflow or operation issues come up:

• Central air conditioner air handler air filter 317659-405 (routine maintenance item)
• Board circ HK61EA005 (controls and system operation)
• Brackets and mounting hardware (fit and support components)

Quick guide: which part relates to which symptom

Symptom	What to check first	Part example on this model page
Weak airflow, dusty vents	Filter condition and correct fit	Central air conditioner air handler air filter 317659-405
Fan runs wrong, won’t respond to thermostat, intermittent operation	Control board and wiring connections	Board circ HK61EA005
Rattling or vibration	Loose mounting points and supports	Bracket 314900-203

Why it matters

Knowing Carrier makes air handlers helps when you are matching parts by brand and model number. For HVAC equipment, the exact model number (FK4DNB006000AAAA) is the fastest way to get the right air filter, control board, and mounting parts.

Ordering the right parts

We recommend ordering replacement parts for your Carrier FK4DNB006000AAAA directly from the parts list for this model, or searching by model number on Sears PartsDirect if you are comparing additional diagrams and part options.

Last updated: February 2026

For Carrier fan coil/air handler model FK4DNB006000AAAA, getting the right replacement part is usually straightforward when you order by exact model and part number; delays mainly happen when a part is older, revised, or temporarily out of stock. Ordering from the model parts list helps you match fit fast.

What can make Carrier parts seem “hard to get”

These are the most common reasons customers run into delays or wrong orders:

• The part is model-specific (controls, brackets, wiring components)
• The original part number was replaced by a substitute number
• Peak-season demand reduces availability for common HVAC items
• The unit is older, so fewer suppliers stock the part
• The symptom was misdiagnosed, so the first part ordered is not the fix

Parts we commonly see replaced for this model

Examples of parts available for FK4DNB006000AAAA include:

• Central air conditioner air handler air filter 317659-405
• Board circ HK61EA005

Quick guide: where to start

Symptom	Best first check	Typical next step
Weak airflow, dusty vents	Filter condition and size	Replace the air filter, then recheck airflow
Blower will not run or runs erratically	Power, wiring, and connections	Electrical testing, then consider the control board
Rattling or vibration	Panels and mounting hardware	Tighten fasteners; replace damaged hardware as needed

Why it matters

Using the exact model number and the correct part number prevents repeat downtime, protects the blower and coil from restricted airflow, and reduces the chance of ordering a non-matching electrical control.

How we recommend ordering to avoid delays

• Confirm the data plate shows FK4DNB006000AAAA
• Use the model parts list to match the part number exactly
• Compare your old part markings to the listing before checkout
• For electrical parts, shut off power at the breaker before inspection
• If you need to search beyond the model list, use Sears PartsDirect

Last updated: February 2026