Open 24/7 for emergencies
An LG mini split repair starts with the $99 diagnostic, and the repair is priced in writing before anything gets opened. If it’s past fixing, a new one-zone Mitsubishi Electric system is $7,000 to $10,000 installed. The CH number on the display is a code, and the tables below say what it means.
Price range
$7,000-$10,000
8yrs @ 7.99%
$99/mo
15yrs @ 9.99%
$75/mo
Monthly figures on the starting price, the whole price financed, on approved credit. The lender sets the final terms. How financing works
Get your price in writing
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Rather talk now? (703) 997-9757
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Read your own mini split
What people describe on the phone, and what it usually turns out to be on an LG.
An LG head that blinks is reporting a fault: the number of blinks, or the code the remote reads back, points at a sensor, the drain, the fan or the outdoor unit. The table below lists them. On an LG, look at the display: the code is a CH number.
The head’s drain pan or line is clogged, or the unit was mounted without enough fall toward the drain. A dirty coil and blower wheel make it worse. It’s a cleaning and a drain fix, not a new unit. On an LG with a condensate pump, CH04 means the pump has stopped doing its job.
A clogged filter or blower wheel first, then a dirty outdoor coil, then refrigerant. Mini splits lose refrigerant at the flare fittings where the copper meets the unit, and a leak there gets found and fixed.
Check the breaker and the disconnect. If they’re on, the indoor unit can’t talk to the outdoor one (a communication code), or the outdoor board or fan motor has failed. On an LG multi-zone system, CH05 is that lost connection and CH67 a stuck outdoor fan.
Dust and moisture living on the coil and the blower wheel inside the head. A deep cleaning takes the wheel and coil back to metal.
Frost that clears every hour or so is the unit defrosting, which is normal. Ice that keeps building, or water that refreezes under the unit, is a drain or a defrost problem.
The number on the display
An LG shows its fault as a number, which LG writes as CH and the number, on the indoor unit’s display or the wired remote, and the outdoor board shows it too. Write the number down: it’s the first thing we’ll ask for.
Seven of them, in our own words, from LG’s multi-zone service manual. A single-zone LG has its own manual, so match the model on your unit’s label first.
| Code | What it means | What it usually takes |
|---|---|---|
| CH05 | The indoor unit isn’t hearing from the outdoor unit | The wiring between them, a board, or no power outside |
| CH01, CH02, CH06 | One of the indoor unit’s temperature sensors reads open or shorted: the room air sensor, or one on the coil’s piping | An indoor sensor |
| CH04 | On units with a condensate pump, the pump isn’t working | A clogged or failed drain pump |
| CH10 | The indoor fan motor is unplugged or stuck | The fan motor, or a blower wheel that’s dragging |
| CH21 | The power module on the outdoor inverter board faulted | The outdoor inverter board |
| CH26 | The compressor couldn’t get started | The compressor or the board that drives it |
| CH67 | The outdoor fan is stuck or not turning | The outdoor fan motor |
Source: LG multi-zone service manual (MFL68280210). Codes vary by model and control board: the chart printed on your unit, or its manual, is the final word.
LG units on R-32 refrigerant carry a leak detector, and it reports by number too.
| Code | What it means | What to do |
|---|---|---|
| 228, 229, 230 | The refrigerant leak detector is reporting a problem | Open the windows, air the room out, and call right away: (703) 997-9757. That’s LG’s own instruction. |
| 236 | The leak detector has less than 6 months of life left | A new detector. LG says it’s replaced after it detects gas, or at 3,650 days, about 10 years. |
Source: LG ARTCOOL R-32 single-zone installation manual. Codes vary by model and control board: the chart printed on your unit, or its manual, is the final word.
What it costs
An LG repair is priced after the $99 diagnostic, because the fix depends on the code and what we find. When it’s past fixing, a new Mitsubishi Electric system is a range we can print, by the number of rooms.
Diagnostic visit
$99
The code read, the fault found, the repair priced in writing.
One zone, installed
$7,000 to $10,000
or $117/mo at 0% APR for 60 months
A new Mitsubishi Electric: one outdoor unit, one head.
Two zones, installed
$11,000 to $15,000
or $183/mo at 0% APR for 60 months
A new Mitsubishi Electric: one outdoor unit, two heads.
Three zones, installed
$12,500 to $18,000
or $208/mo at 0% APR for 60 months
A new Mitsubishi Electric: one outdoor unit, three heads.
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
LG publishes how to read the year from its serial number. Here’s the rule, and the catch.
LG’s own support pages say the serial number starts with three digits: the first is the year it was built, the next two the month. One digit can’t say which decade, so a serial starting 507 means July of 2015 or of 2025. The model number, or the install paperwork, settles it.
The date matters for the warranty. If nobody can show when the system started up, LG counts its 5 years on parts and 7 on the compressor from the day it was built, not the day it went in. Keep the invoice.
Four zones, installed
$16,000 to $21,000
or $267/mo at 0% APR for 60 months
One outdoor unit, four indoor heads.
Ducted heat pump system
$8,499 to $21,650
or $142/mo at 0% APR for 60 months
Heat pump and air handler for the whole house.
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 mini split estimator prices your house in a few questions.
One of our technicians moving a new outdoor unit up a Northern Virginia driveway, the SwiftPro trucks behind him.
When it’s done
When an LG is past fixing, we’d put a Mitsubishi Electric on the wall, and here’s why.
A Mitsubishi Electric unit on rails above a metal roof inside an aircraft hangar, one of our commercial jobs in Northern Virginia.
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. It comes down to who installed it, whether it was registered, and how fast you file. Here’s how LG’s works.
Where we work
Out of Chantilly and Ashburn, across six counties. Pick your town for its own ductless mini split page: the houses there, the county’s permit rules, and 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, and the repair is priced in writing after it, because a clogged drain pump and a failed inverter board are very different jobs. If it’s past fixing, a new one-zone Mitsubishi Electric system is $7,000 to $10,000 installed, two zones $11,000 to $15,000. From about $117 a month at 0% APR for 60 months, the whole price financed, on approved credit. How financing works
On an LG multi-zone system, CH05 means the indoor unit isn’t hearing from the outdoor unit: the wiring between them, a board, or an outdoor unit with no power. Check the breaker and the outdoor disconnect first. If they’re on, it’s a service call.
Open the windows, air the room out, and call right away: (703) 997-9757, 24/7. On newer R-32 LG units those numbers come from the refrigerant leak detector, and LG says to ventilate and get a technician immediately. A 236 is calmer: the detector has less than 6 months of life left.
Maybe. LG’s current statement gives 5 years on parts, compressor included, and 2 more on the compressor; 10 on both when an LG-trained installer put it in and it was registered within 60 days of startup. Without proof of startup, the clock started on the manufacture date. File fast: LG wants a claim within 30 days of finding the problem, and labor isn’t covered.
Yes. An LG mini split moves refrigerant, reads its sensors and drains its water the way any mini split does, and LG prints its codes in its own manuals, which is where the tables on this page come from. When one’s past fixing, we’d put in a Mitsubishi Electric.
Get the room comfortable
Call (703) 997-9757, 24/7, or send the form at the top with the CH number it’s showing, and the office calls or texts you back.
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
A repair is quoted in writing after the diagnostic. New system prices are SwiftPro’s installed ranges for a Mitsubishi Electric system, by number of zones.
LG, ARTCOOL and Multi F are trademarks of their owners. Mitsubishi Electric and Diamond Contractor® are trademarks of Mitsubishi Electric Corporation or Mitsubishi Electric Trane HVAC US LLC.