Car A/C, electrical and general service — diagnosed before it is quoted
An independent multibrand workshop in Kallikuppam. The A/C, electrical and general checkup is free: we inspect first, explain the fault, and share the estimate before any paid work starts.
Free 30-point A/C and electrical checkup, with a written report
A/C gas filling at a published fixed price — ₹1,500 single, ₹2,200 double module
Diagnosis-first is the whole method: measure, write it down, then price it. It is also why we publish a fixed gas-filling price and quote everything else afterwards.
We test before we quote
The free 30-point A/C and electrical checkup runs first — about 15 minutes, with a written report of what was measured.
You get the estimate in writing
The report says what was found and what it costs. Gas filling is a fixed published price; anything beyond it is quoted from the diagnosis.
No work starts until you approve
Nothing is opened up or replaced before you say yes to the estimate. If the diagnosis changes the scope, you hear about it first.
What we actually check
The parts behind the usual complaints
Choose a part to see what gets tested and why. Cooling faults in particular have several possible causes, which is why nothing is replaced before it is measured.
A/C condenser
Sits at the front, behind the grille. Blocked fins or a leak here shows up as weak cooling in traffic and normal cooling on the move.
Illustration only — a generic cutaway used to show where these parts sit, not a diagram of any particular model.
Illustrative photography of diagnostic work. Not a photograph of GM premises or staff.
Why diagnosis-first
Replacing the wrong part is the expensive way to fix a car
Most “A/C not cooling” jobs have more than one plausible cause. Testing first costs you fifteen minutes; skipping it costs a part that was never the problem.
The fault is measured, not guessed
Gauges, scanner and a load test come before a parts recommendation. That is what the written report records.
G.M. Manigandan, M.D and lead technician
He has worked on cars with his own hands since 2018 and opened this workshop in 2019, and he still works on them — the diagnosis-before-replacement rule is his, he trains every technician here in it, and he teaches the 27-day A/C course himself. The person diagnosing your car is the person answering the phone.
Multibrand, independent
Maruti Suzuki, Hyundai, Tata, Toyota, Mahindra, Honda, Kia and more, serviced in one workshop in Ambattur.
Leadership & Workshop Verification
“Every diagnosis is backed by data and explained to you in plain Tamil or English before a single screw is turned.”
G.M. Manigandan · Founder, Managing Director and Lead Technician, GM Car A/C Service
Not a promise about outcomes — a description of the process you can hold us to when you arrive.
Illustrative image. Not a photograph of GM premises, staff or a customer vehicle.
We show you the reading, not just the verdict
The gauge set goes on before any recommendation is made. You see what the pressures actually are, and what they mean for the fault you came in with.
Illustrative image. Not a photograph of GM premises, staff or a customer vehicle.
The checkup comes back as a written report
Thirty points — seventeen on the A/C, thirteen electrical — go on a sheet you keep. Anything outside that list is quoted separately before it is touched.
Illustrative image. Not a photograph of GM premises, staff or a customer vehicle.
Electrical faults are measured, not swapped at
Battery, alternator and starter are load-tested together and the scan tool is read before a part is named. An overnight drain is a wiring question first.
Illustrative image. Not a photograph of GM premises, staff or a customer vehicle.
One workshop, start to finish
Recovery machine, lift and bench are in the same bay, so an A/C job that turns out to be electrical does not become somebody else’s appointment.
Illustrative image. Not a photograph of GM premises, staff or a customer vehicle.
The test is whether it is cold when you drive it
Vent temperature is checked at idle and on a road test, because a system that cools in the bay and not in traffic has not been fixed.
Illustrative image. Not a photograph of GM premises, staff or a customer vehicle.
Covers go on before anyone gets in
Seat and floor protection is standard on every job that needs cabin access — dashboard work should not cost you an interior.
Published prices
The prices we can state before seeing the car
Free A/C, electrical and general checkup. We inspect first, explain the fault, and share the estimate before any paid work starts.
A/C gas filling is fixed. Everything else depends on what the diagnosis finds, so it is quoted in writing afterwards rather than guessed at now.
Single A/C module
₹1,500
Fixed price. Leak check and vacuum included before filling.
Double A/C module
₹2,200
Fixed price. For vehicles with front and rear A/C units.
30-point A/C & electrical checkup
Free
about 15 minutes, with a written report. 17 A/C points and 13 electrical points, run before any estimate.
A/C Gas + Airflow Refresh
from ₹1,999
From this price. Gas fill with leak check, cabin filter and vent airflow service. Confirmed at the counter before work starts, because a double-module car or a filter we have to order costs more.
Service packages
Essential Service
from ₹2,499
Engine oil and filter, multi-point inspection, fluid levels, battery and tyre check.
Petrol General Service
from ₹4,499
Everything in Essential, plus brakes, suspension, scanner diagnostics and an A/C cooling check.
Diesel General Service
from ₹5,699
Full inspection and diagnostics scan, A/C performance test, brake service, fluid replacement and a road test.
Repairs beyond gas filling — compressor, condenser, cooling coil, wiring or general service work — are confirmed after diagnosis. You get the figure in writing before anything is opened up. See the full price guide.
Annual plans
GM Cool Care, if you would rather budget once a year
Four plans covering A/C and general service across the year, with the free 30-point checkup at every visit.
A/C Protect₹2,499per year
A/C inspection through the season: performance, vents, leak, blower, condenser and cabin filter, plus a pre-summer check.
Essential₹2,999per year
One A/C gas refill and one Essential Service, with the free 30-point checkup at every visit and priority booking.
Complete₹6,499per year
General service with oil change, a gas refill, a six-month midpoint service and a pre-summer top-up. ₹7,699 for diesel.
Master₹9,999per year
Everything in Complete plus a post-monsoon inspection, pick-up and drop priority, 15% off parts and a digital service record.
Certified sub-4°C chilling standard
Comprehensive 30-Point Climate Health Verification
Every Cool Care visit includes digital pressure profiling, vent delta temperature verification, filter sanitisation and full electrical load checks before handover.
Plans are arranged over WhatsApp or at the counter — there is no online checkout. Full scope for each tier, and how many places remain, are on the Cool Care plans page.
Book a slot
Tell us what the car is doing
We will call you back to confirm a slot. Nothing is charged and nothing is booked until we have spoken.
Is the checkup really free, or is there a diagnosis charge?
The A/C, electrical and general checkup is free, with nothing to pay and no obligation to have the work done. We inspect first, explain what we found, and share the estimate before any paid work starts. It takes about 15 minutes on a booked slot and you leave with a written report. Call +91 8428000085 to book a slot.
What is the A/C Gas + Airflow Refresh?
Gas filling with a leak check, plus the cabin filter and vent airflow service, from ₹1,999. It is a starting price rather than a fixed one: a car with front and rear A/C, or a cabin filter we have to order for the model, costs more. The counter confirms the total before the work starts.
How much does car AC gas filling cost in Chennai?
AC Gas Filling — ₹1,500 (single module) · ₹2,200 (double module). The published price includes a leak check. Call +91 8428000085 to discuss your vehicle and availability.
Why is my car AC not cooling properly?
Poor car AC cooling can result from low refrigerant, a gas leak, a cabin-filter restriction, compressor, condenser, cooling-coil or electrical faults. GM Car A/C Service diagnoses the fault before recommending repair work. Learn more about AC cooling problems →
How are repair estimates confirmed?
For compressor, cooling-coil, electrical and general-service repairs, the recommended work and estimate are confirmed after diagnosis because vehicle condition and parts requirements vary.
How long will my car A/C repair take?
Repair timing depends on the diagnosed fault, vehicle and parts required. GM confirms the expected timeline after diagnosis before approved work begins. Book an appointment or call +91 8428000085 to discuss your car.
Is pickup and drop available in Chennai?
Free pick-up and drop anywhere in Chennai, on confirmed bookings, subject to slot availability across Chennai. Call +91 8428000085 or WhatsApp GM Car A/C Service to confirm availability and timing for your location and service need.
Which car brands do you service?
GM Car A/C Service is an independent multibrand workshop in Ambattur, Chennai. Share your vehicle model and service concern when you contact GM so the team can confirm the appropriate diagnosis and service. Explore the service options or call +91 8428000085.
Where we work
Serving north and west Chennai from Ambattur
The workshop is at 12A, Gangai Amman Kovil Street, Kallikuppam, Ambattur. These pages cover what we see most often in each area.
Since 2019 · Ambattur
