Arm · based in San Kamphaeng · working across Chiang Mai
Aircon cleaning & AC repair in Chiang Mai
I am Arm, and I do the work myself. Every rate is published, you get the full cost before I start, and the floor and furniture are sheeted before anything comes apart. Send me a photo on LINE and you will have a price the same day.
AC service LINE @iu3333 · washing machine cleaning LINE @794xvrnm · Mon–Sat 8:00–18:00, other times by appointment at an extra charge
- Registered company: CHER SOLUTIONS CO., LTD.
- Arm does the work himself
- No deposit, pay after you have seen the work
What I do
Aircon cleaning
500 THB · 450 for 3+
Standard clean 500 THB per wall unit, or 450 THB each for three or more. The full strip-down clean is 2,300–2,500 THB depending on size — I take out the blower wheel and every removable part and wash them separately. Both finish with a disinfectant spray. Drip warranty: 30 days for the standard clean, 60 days for the full strip-down. The standard clean is enough for a unit with no smell that gets cleaned regularly — I recommend the full strip-down only where it is needed.
AC repair
500 THB diagnostic
Not cooling, water dripping, strange noises, unit cutting out. I charge 500 THB to diagnose it, and I take that off the bill if you go ahead with the repair. I quote you before I touch anything.
New installation
from 3,000 THB
3,000 THB for 9,000–12,000 BTU, 3,500 THB for 13,000–24,000 BTU. I vacuum the line set fully on every installation — the step that protects the compressor for the long run. The price includes the wall bracket, up to 4 m of piping and the trunking. Warranty up to 1 year.
Relocation
3,500 THB
Moving house or changing rooms. I pump the refrigerant back into the condenser before disconnecting, so you are not paying for a full recharge afterwards. Removal only is 700 THB.
Suspended and ceiling units
from 1,300 THB
Restaurants, cafés and offices usually have units suspended below the ceiling or recessed into it. They sit high up and everything below has to be sheeted off first, so they take longer than a wall unit. Suspended units from 1,300 THB, ceiling-recessed from 1,500 THB. The final price depends on the size of the unit and how high the ceiling is, and I tell you before I start.
Buying a unit and trade-ins
quoted per model
I sell both new and checked second-hand units, fitted. I supply and fit the unit myself, and the warranty covers both the unit and the installation. Unit prices depend on the model and the promotion running at the time, so I quote per model. Second-hand units carry a 1 month warranty on the unit itself. I also take your old unit in part-exchange, but I have to see it before I can put a price on it.
Washing machine drum clean
from 999 THB
I take the drum out and wash every removable part. The build-up sits on the outside of the drum, where water alone cannot reach. Top loaders start at 999 THB and go by capacity; front loaders start at 1,299 THB because they are more involved to strip down. Around three hours per machine, 30-day warranty.
Refrigerant is 25 THB per pound for both R32 and R410A. The level is measured in front of you at no charge first, so you can see whether a top-up is needed before you pay for one.
Work out your price
Pick how many units you have. Multi-unit rates apply automatically, and there is no travel fee.
Wall unit 9,000–18,000 BTU
500 THB · 3+ units 450 THB
0Wall unit 18,001–36,000 BTU
650 THB · 2+ units 600 THB
0Full strip-down clean (Premium)
2,300–2,500 THB · depends on BTU size
0Suspended ceiling unit
from 1,300 THB
0Four-way ceiling cassette
from 1,500 THB
0
Tap + next to a unit type and the total appears here.
The burning season matters more than you think
If you are new to Chiang Mai, the months from February to April are the hard part of the year. The city sits in a bowl ringed by mountains, and in the dry season a layer of warm air traps smoke from agricultural burning over the valley for weeks at a time.
Two things follow from that. First, the filter that came with your air conditioner does not stop PM2.5 — it is designed to catch coarse dust and protect the coil, not fine particulates. What your aircon actually does for you is let you keep the room sealed, which is what really keeps the outdoor air out. Pair it with a HEPA purifier for the room you sleep in.
Second, soot clogs coils fast. A unit that was fine in January can be blowing weakly by March, and April is the hottest month, when every technician in the city is fully booked. A clean before the season starts is far easier to arrange than one during it.
Why people call me back
- Every rate is published, so you know the cost before you call. I confirm the exact figure with you before I start, and it does not change afterwards.
- Refrigerant is measured in front of you. A system that is not low does not get topped up, because overcharging one shortens the life of the compressor.
- Old parts come back to you with an explanation of what failed. Where a repair costs more than the unit is worth, I give you the repair cost and the replacement cost side by side, and the decision stays with you.
- Two layers of drop sheets on every cleaning job. Floor and furniture stay as they were.
- Every clean includes a disinfectant spray. Warranty against drips: 30 days after a standard clean, 60 days after a full strip-down clean. Repairs: 30 days. Installation: up to 1 year.
- Full VAT tax invoices and receipts issued in the company name, Cher Solutions Co., Ltd., for business bookings.
What the work looks like
Most of the dirt sits where you cannot see it until the parts come out.
Sheets go down before anything is opened
A catch sheet around the unit keeps water off the wall
What the inside usually looks like before a clean
Filters come out first
Every removable part is washed on its own
The same kind of screen once it is clean
Video from real jobs
Watch how a clean is done
From the sheets going down to the parts coming out, filmed at homes in Chiang Mai.
Standard wall-unit clean, 500 THB
Washing the coil and removable parts
Full strip-down clean to stop water dripping
Recent jobs, photographed on site
Before and after, from real jobs
Photos from real jobs in Chiang Mai, from the condition I found on arrival to the finished result. A single visit often covers several units.
BeforeAircon·26 Jun 2026
Aircon clean, 4 units
Before 35 · During 13 · After 22 photos
See all 70 photos
BeforeAircon·26 Jun 2026
Aircon clean, 4 units
Before 22 · During 6 · After 28 photos
See all 56 photos
BeforeAircon·26 Jun 2026
Aircon clean, 4 units
Before 7 · During 7 · After 15 photos
See all 29 photosWashing machine jobs
Drum out, every part washed
Recent washing machine jobs in Chiang Mai, top and front loaders, photographed before and after.
BeforeWashing machine·24 Aug 2026
Washing machine drum clean, LG top loader
Before 8 · During 1 · After 5 photos
See all 14 photos
BeforeWashing machine·24 Aug 2026
Washing machine drum clean, front loader
Before 6 · After 6 photos
See all 12 photos
BeforeWashing machine·24 Aug 2026
Washing machine drum clean, front loader
Before 3 · After 9 photos
See all 12 photosFrom a customer
What a customer wrote
★★★★★
“I just used this service. Admin always responded, the staff were polite, professional, fast, effective, and clean, and a very fair cost. They have my complete confidence and appreciation. Thank you”What happens when you book
Four steps, no deposit, and nothing is charged until the work is finished and you have seen it.
- 1Send a photo and your areaOn LINE, in English. A photo of the indoor unit, roughly how many you have, and the district you are in is enough for me to work from.
- 2You get a price and a timeUsually within a few hours during working hours. The figure covers the whole job, travel included, and it is what you pay at the end.
- 3I come and lay the sheets firstTwo layers over floor and furniture before anything is opened. If I find something the photo did not show, I stop and ask you before carrying on.
- 4Pay when it is doneCash or Thai bank transfer once you have seen the finished work — no Thai bank account needed, cash is fine. Receipt in the company name on request.
Areas I cover
I am based in San Kamphaeng, so the eastern side of the city is quickest for me. I cover every sub-district of Mueang Chiang Mai — the old city, Nimman, Santitham and the airport side — as well as San Sai and northern Hang Dong, plus the parts of San Kamphaeng, Mae On, Saraphi and Doi Saket within my service range.
San Kamphaeng
7 sub-districts- San Kamphaeng
- Ton Pao
- San Klang
- Sai Mun
- Buak Khang
- Chae Chang
- Mae Pu Kha
Saraphi
8 sub-districts- Pa Bong
- Chai Sathan
- Chom Phu
- Saraphi
- Yang Noeng
- Tha Wang Tan
- Nong Faek
- Nong Phueng
Mueang Chiang Mai
every sub-district- Tha Sala
- Nong Pa Khrang
- Nong Hoi
- Wat Ket
- Chang Khlan
- Chang Moi
- Si Phum
- Phra Sing
- Hai Ya
- Pa Daet
- Pa Tan
- Fa Ham
- San Phi Suea
- Chang Phueak
- Suthep
- Mae Hia
Doi Saket
5 sub-districts- Mae Khue
- Samran Rat
- San Pu Loei
- Talat Yai
- Mae Hoi Ngoen
San Sai
every sub-district- San Phra Net
- San Sai Luang
- San Sai Noi
- San Na Meng
- San Pa Pao
- Nong Chom
- Nong Han
- Nong Yaeng
- Pa Phai
- Mueang Len
- Mae Faek
- Mae Faek Mai
Hang Dong
4 sub-districts- San Phak Wan
- Ban Waen
- Nong Khwai
- Hang Dong
Mae On
3 sub-districts- On Nuea
- On Klang
- Ban Sahakon
More in English
- Full price listEvery service, published up front
- Air conditioner repairMeasured and shown before any quote
- Installation and relocationUnits bought online welcome
- Washing machine deep cleanDrum out, every part washed
- About Arm and the companyRegistered company, who comes to your home
- Real jobs, before and afterAircon and washing machine photos
- Case reportsWhat I found, what I did, with photos
- Aircon and washer guidesProblems, prices and care, from a working technician
- Areas I coverA page for each area, with local notes
- Condo aircon cleaningNo balcony needed, move-out cleaning
- Airbnb and rentalsCleaning between guests
Frequently asked questions
Do you speak English?
I work in written English on LINE, using a translation app. Bookings, quotes and job details all go through smoothly that way, and you keep a written record of what was agreed. Short, plain sentences come through most accurately — if a reply reads oddly, say so and I will put it another way. LINE works far better than a phone call, so please message rather than ring.
How much does aircon cleaning cost in Chiang Mai?
My standard clean is 500 THB per wall-mounted unit for 9,000–18,000 BTU, dropping to 450 THB each when you have three or more. Larger units at 18,001–36,000 BTU are 650 THB, or 600 THB each from two up. The full strip-down clean is 2,300–2,500 THB per unit depending on size.
How often should I clean my aircon in Chiang Mai?
More often than in most places, unfortunately. During the burning season from February to April the air here carries far more soot than usual and filters clog fast. I suggest a full clean in January before the season starts, rinsing the filters yourself every 2–4 weeks through it, and a second full clean around May or June.
Can you issue a tax invoice for my accounts?
Yes. Cher Solutions Co., Ltd. is VAT registered, so I can issue a full VAT tax invoice as well as a receipt, in the company name, for cafés, restaurants, hotels, guesthouses and offices. Send me your company name and tax ID before the visit and the paperwork is ready when the job is done.
Do you work on condos and rental properties?
Yes — houses, condos, dormitories, hotels, restaurants and offices. If you manage an Airbnb or a rental villa and need units serviced between guests, message me with the number of units and the area and we can work out a schedule that fits your turnovers.
How quickly can you come?
Usually within 24 hours, and the same day if I have a slot free. I work Monday to Saturday, 8am to 6pm, and can take bookings outside those hours for an additional fee that I quote first. The exception is February to April, the burning season, when the whole city is booking at once. Booking a week ahead is safer then.
Get a quote today
Send me the number of units, roughly what size they are, and your area. I will give you a price before anyone comes out. LINE is easiest for English.
Mon–Sat 8:00–18:00, other times by appointment at an extra chargeVAT tax invoice available