Open 24/7 for emergencies
A Daikin AC, heat pump or furnace repair in Northern Virginia starts with the $99 diagnostic, and most Daikin repairs run $95 to $1,500, priced in writing before anything is touched. A Daikin mini split gets the same diagnostic, and the blinking light on the indoor unit is a code we can read.
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Rather talk now? (703) 997-9757
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Licensed and insuredVirginia Class A contractor #2705192276
24/7 emergency serviceOften same-day, and we will tell you honestly when we can get there.
Our own HVAC installersA dedicated heating and cooling team, separate from our plumbers
Price in writing firstYou see every option priced before anything is ordered
Read your own Daikin
The things people describe on the phone, what they turn out to be on a Daikin, and what the fix costs.
The burners lit and went out, or never lit. On a Daikin that’s usually a sooted flame sensor ($95 to $180 to clean) or a cracked igniter ($240 to $410). The board’s light will be flashing a code; the table below says which. On a Daikin DM97MC with a ComfortNet thermostat, the thermostat spells the fault out too, like WEAK FLAME or PS1 OPEN.
A furnace that keeps restarting is protecting itself: a dirty flame sensor, a clogged filter tripping the high limit, or a pressure switch that can’t prove the venting. Start with the filter. Then count the flashes.
Most of the time it’s the run capacitor ($240 to $370). Turn it off at the thermostat: a compressor that keeps trying to start against a dead capacitor can burn itself out.
In summer, ice means the coil isn’t getting enough air (a filter, a dirty blower wheel at $300 to $440) or it’s low on refrigerant, which means a leak. On a heat pump in winter, some frost is normal; a solid block of ice that never clears points at the defrost board ($450 to $1,150). On a Daikin ComfortNet heat pump, code 01 is a low side fault, and the first cause Daikin’s manual lists is a low refrigerant charge.
A high-efficiency furnace and every AC coil make water, and it has to drain. A clogged trap or drain line ($175 to $420 to clear, with a float switch added) is the usual answer. Water from the tank beside it is a water heater call.
A squeal or whine is usually the inducer or the blower motor’s bearings on the way out (a blower motor runs $670 to $2,400, standard against variable speed). A bang at startup is delayed ignition: gas building up before it lights. That one needs a look soon, not next month.
A system that never shuts off is short on capacity: low refrigerant, a dirty outdoor coil, a blower wheel packed with dust, or a heat pump leaning on its backup electric heat. Each one is a price, not a guess.
Leave the house, then call the gas company from outside. Once it’s safe, call us: (703) 997-9757, 24/7.
A Daikin mini split dripping, blinking or barely cooling? Its codes are in the third table below, and the repair is priced after the diagnostic.
The codes
Daikin has three kinds of codes: the furnace board, the outdoor unit and the ductless head. Find the model number on the rating plate, match it to a table, and write the code down before you reset anything: a reset clears it.
The board shows a two-character code, and a ComfortNet thermostat prints the fault in words, shown here in capitals. Newer DR-series Daikin furnaces use a different board: go by the chart on the furnace door if it has one.
| Code | What it means | What it usually takes |
|---|---|---|
| E0 | Lockout after too many tries to light (LOCKOUT) | Gas supply, igniter or flame sensor |
| E2 | Low stage pressure switch didn’t close (PS1 OPEN) | The venting, the drain or the inducer |
| E3 | High limit open (HIGH LIMIT OPEN) | Start with the filter and the airflow |
| E4 | Flame sensed when there shouldn’t be one (IMPROPER FLAME) | Shut the gas off and call |
| E5 | Open fuse | A short in the low-voltage wiring |
| E6 | Weak flame signal (WEAK FLAME) | Usually a flame sensor cleaning |
| EA | 115-volt polarity reversed (REVERSED PLTY) | A wiring fix |
| EC | Inducer motor drawing too much current (INDUCER FAULT) | The inducer motor |
| Ed | Manual reset rollout switch open (ROLLOUT OPEN) | Call: Daikin’s list of causes includes a damaged heat exchanger |
| EF | Auxiliary input open: the float switch tripped | A clogged condensate drain, usually |
Source: Daikin DM97MC and DC97MC furnace service manual (2014). Codes vary by model and control board: the chart printed on your unit, or its manual, is the final word.
These two-stage condensers and heat pumps blink a yellow light on the outdoor board, and a ComfortNet thermostat shows the fault with a two-digit code. Today’s inverter units (DC9VS, DH9VS, the Daikin FIT) use their own display, and we haven’t found Daikin’s public list for those, so we read them on site.
| Code | What it means | What it usually takes |
|---|---|---|
| 01 | Low side fault: low pressure lockout | Low refrigerant, which means a leak to find |
| 02 | High side fault: high pressure lockout | A blocked or dirty outdoor coil, first |
| 03 | Short cycling | The thermostat calling on and off |
| 04 | Locked rotor | The compressor, often seized |
| 05 | Open circuit | Power to the compressor cut off, or a failed compressor |
| 06 | Open start circuit | The compressor’s start winding or its wiring |
| 07 | Open run circuit | The compressor’s run winding or its wiring |
| 08 | Line voltage too low or too high | The power supply to the unit |
| 09 | Control voltage under 18 volts | The transformer or the low-voltage wiring |
Source: Amana and Daikin ComfortNet condensing unit service manual (2015). Codes vary by model and control board: the chart printed on your unit, or its manual, is the final word.
The OPERATION lamp blinking about every half second means the unit is flagging a fault. The remote’s diagnosis mode finds the code: a long beep marks the right one. If the lamp blinks again after a reset, Daikin says to turn off the breaker and call.
| Code | What it means | What it usually takes |
|---|---|---|
| U4 | Indoor and outdoor units lost communication | The wiring or a board between the two |
| U0 | Refrigerant shortage | A leak to find and fix |
| A1 | Indoor control board fault | A new indoor board |
| A5 | High pressure control or freeze-up protection | A clogged filter or dirty coil, first |
| A6 | Indoor fan motor fault | The fan motor, or a blower wheel that’s dragging |
| C4, C9 | An indoor temperature sensor failed | A sensor |
| E6 | The compressor won’t start | The outdoor unit: the compressor or its drive |
| E7 | Outdoor fan motor fault | Check for anything stuck in the fan, then the motor |
| F3 | Discharge pipe running too hot | A refrigerant or airflow problem at the outdoor unit |
| L5 | Output overcurrent | Make sure nothing blocks the outdoor unit’s air outlet, then call |
Source: Daikin ATMOSPHERA operation manual. Codes vary by model and control board: the chart printed on your unit, or its manual, is the final word.
What it costs
Our own repair prices for Daikin furnaces, ACs and heat pumps, by part. Tap a system to narrow the list. A mini split repair is priced after the diagnostic, below.
Flame sensor cleaned
The thin rod that proves the burners lit. Coated in soot, it tells the board the flame went out, and the gas shuts off a few seconds after the burners light.
$95 to $180
Condensate drain cleared, trap and switch added
High-efficiency furnaces and every AC coil make water. When the drain or trap clogs, a float switch stops the system on purpose so the water doesn’t end up in the ceiling.
$175 to $420
Refrigerant topped up
One to three pounds. If it needs it again next season it’s leaking, and topping it up every year is the expensive way to lose.
$190 to $740
Run capacitor replaced
The part that kicks the compressor and fan motors into turning. The single most common reason an outdoor unit hums and never starts.
$240 to $370
Igniter or flame sensor replaced
A cracked hot surface igniter glows weakly or not at all, so the burners never light. Usually on the van.
$240 to $410
Contactor replaced
The relay that sends power to the outdoor unit. Burnt or stuck points mean it sits silent while the thermostat calls, or runs when it shouldn’t.
$290 to $425
Blower wheel pulled and cleaned
A wheel caked in dust moves a fraction of the air it should: weak airflow, a frozen coil, a furnace tripping its limit.
$300 to $440
Thermostat replaced
Standard through smart, wired and set up for the system it runs.
$300 to $640
Defrost board replaced
Heat pumps only: the board that decides when to melt the ice off the outdoor coil.
$450 to $1,150
Control board replaced
The brain in the furnace or air handler. When it goes, nothing downstream of it does what it’s told.
$550 to $1,180
Blower motor replaced
The indoor fan motor. The spread is a standard motor against a variable-speed one.
$670 to $2,400
Condenser fan motor replaced
The fan on top of the outdoor unit. If it stops while the compressor runs, the repair gets more expensive by the minute.
$1,100 to $1,500
Refrigerant leak found and repaired
Finding it, fixing it, then recharging the system.
$1,850 to $2,700
or $31/mo at 0% APR for 60 months
Compressor replaced, part under warranty
Labor and refrigerant, when the manufacturer still covers the compressor.
$1,900 to $2,500
or $32/mo at 0% APR for 60 months
Compressor replaced, out of warranty
The big one, and usually the point where replacing the system wins. You get both numbers.
$2,200 to $5,100
or $37/mo at 0% APR for 60 months
Monthly figures: 60mo @ 0% APR on each starting price, the whole price financed, on approved credit. Longer plans lower the payment and cost more in total. The lender sets the final terms. How financing works
Mini split diagnostic
$99
The code read, the fault found, the repair priced in writing.
A new one-zone Mitsubishi Electric system
$7,000 to $10,000
or $117/mo at 0% APR for 60 months
Installed: one outdoor unit and one indoor head.
A new two-zone Mitsubishi Electric system
$11,000 to $15,000
or $183/mo at 0% APR for 60 months
Installed: two rooms on one outdoor unit.
Monthly figures: 60mo @ 0% APR on each starting price, the whole price financed, on approved credit. Longer plans lower the payment and cost more in total. The lender sets the final terms. How financing works
Comfort+ members get the $99 diagnostic included in the visit, 15% off any service, and 50% of each repair bill banked toward replacing that system, up to $1,500. How Comfort+ works.
Fix it or replace it
The serial number on the rating plate gives the year and month it was built. Here’s how to read it.
On a Daikin furnace, air conditioner or heat pump, the first four digits of the serial number are the year and the month: 1503… was built in March 2015, 2610… in October 2026 (Daikin’s 2026 warranty certificate). If nobody can show the install date, Daikin counts it as three months after that build date. Daikin doesn’t publish a serial rule for its mini splits; their warranty goes by the manufacture date noted on the unit, with the same three months added.
Consumer Reports members expect a gas furnace to last a median of 20 years (Consumer Reports) and central air about 15 (Consumer Reports).
Gas furnace alone
$4,285 to $14,040
or $71/mo at 0% APR for 60 months
Keeping the AC you have. By size and efficiency, installed.
Furnace and AC together
$8,898 to $23,000
or $148/mo at 0% APR for 60 months
2 to 5 ton, matched, installed with the permit.
Heat pump system
$8,499 to $21,650
or $142/mo at 0% APR for 60 months
Heat pump and air handler, 2 to 5 ton, installed.
Monthly figures: 60mo @ 0% APR on each starting price, the whole price financed, on approved credit. Longer plans lower the payment and cost more in total. The lender sets the final terms. How financing works
Want your own number before anyone comes out? The HVAC estimator prices your house in a few questions.
A ductless mini split head on one of our jobs in a Northern Virginia home.
What we’d put in instead
A Daikin is worth fixing when the problem is a part. When the whole system is done, here’s what Daikin does well and why we’d still put in a Trane or a Mitsubishi Electric.
Holding a Daikin replacement quote? Our free second opinion looks at the system and the quote, and puts a Trane or Mitsubishi Electric priced in writing beside it.
A Trane outdoor unit one of our installers just set. For a ducted system, Trane is our first pick.
The system we put in first
Built to take a beating. Put in by our crew.
Heat lamps, snow and rain on one outdoor unit: that’s Trane’s own film. We’re a Trane Comfort Specialist, on Trane’s own dealer locator, and when you pick a Trane, our crew puts it in.
Films: Trane’s own.
The warranty
Maybe, and the serial number tells us. Here’s how Daikin’s warranty works in Virginia.
Daikin’s own terms: Daikin’s warranty page. Yearly maintenance by any licensed contractor counts, ours included; keep the invoices. A warranty part goes through the licensed contractor doing the repair, and we read your serial number before ordering anything.
Where we work
Out of Chantilly and Ashburn, across six counties. Pick your town for its own AC repair page, with the same prices.
Keep reading
Every make we work on, in one place: the brands we repair.
Asked on the phone
The diagnostic is $99. Most Daikin AC, heat pump and furnace repairs run $95 to $1,500: a capacitor is $240 to $370, a contactor $290 to $425, a defrost board $450 to $1,150, a control board $550 to $1,180. A mini split repair is priced after the diagnostic. If it’s past fixing, a heat pump system we install is $8,499 to $21,650 and a new one-zone Mitsubishi Electric mini split $7,000 to $10,000. From about $117 a month at 0% APR for 60 months, the whole price financed, on approved credit. How financing works
Same company. Daikin bought Goodman in 2012 and builds Amana heating and air under license. Daikin’s own-name systems carry the longest parts warranty of the three: 12 years registered, against 10.
The OPERATION lamp blinking about every half second means it’s flagging a fault. The remote’s diagnosis mode finds the code, with a long beep on the right one: U4 is lost communication between the indoor and outdoor units, U0 low refrigerant, A5 high pressure or freeze-up protection, E7 the outdoor fan. If it blinks again after a reset, Daikin says to turn off the breaker and call.
On a ComfortNet DSXC or DSZC outdoor unit, 01 is a low side fault, and the first cause Daikin lists is a low refrigerant charge: a leak to find. 02 is a high side fault, and the first cause is a blocked condenser coil. Clear any leaves or cottonwood off the outdoor coil, then call.
For the unit replacement, yes: Daikin asks for a licensed contractor named when you register, maintenance every year by a licensed contractor, and written records. The 12-year parts coverage depends on registering within 60 days. A Comfort+ membership covers the heating and cooling visits every year.
Yes. A Daikin furnace, heat pump or mini split works like any other, and its codes are in Daikin’s own manuals. Its warranty parts go through any licensed contractor, so we handle a covered part ourselves.
It has the longest parts warranty in its family and inverter systems like the Daikin FIT. We can’t find a public reliability rating for it: Consumer Reports’ 2022 central air article doesn’t name one. For a new system we’d put in a Trane, or a Mitsubishi Electric mini split where there’s no ductwork.
Get the Daikin running
No heat or no cooling, call: (703) 997-9757, 24/7. Not that urgent? Send the form at the top with the code it’s showing, and the office calls or texts you back to set a time.
SwiftPro Heating, Cooling & Plumbing
4230 Lafayette Center Dr N, Chantilly, VA 20151
44679 Endicott Dr, Suite 211, Ashburn, VA 20147
Virginia Class A contractor license #2705192276
Repair prices are SwiftPro’s own, by part, in Northern Virginia; yours is quoted in writing after the diagnostic. Replacement prices are our installed ranges by system size or number of zones.
Daikin, Daikin FIT, ATMOSPHERA and ComfortNet are trademarks of their owners. Mitsubishi Electric and Diamond Contractor® are trademarks of Mitsubishi Electric Corporation or Mitsubishi Electric Trane HVAC US LLC.