When your air conditioner stops cooling, trips the electrical breaker, or leaks water onto your flooring, you need accurate diagnosis rather than guesswork. Our technicians inspect compressor running currents, test solid-state inverter motherboards, pinpoint refrigerant leaks, and replace failed capacitors across all major Indian cities.
We follow methodical electrical, mechanical, and thermodynamic checks to identify the root cause without replacing parts blindly.
Before checking cooling coils, we test supply voltage at the wall isolator. In Indian summer afternoons, voltage often drops below 195V, preventing compressors from starting. We test contactor terminals, fuses, and ensure proper earth grounding to eliminate shock hazards.
Capacitors lose capacitance due to high summer heat. We measure microfarads (µF) using digital multimeters. If capacitance has dropped more than 5% below its rating, the compressor hums without turning over. We also measure running amps against the unit’s nameplate rating.
If operating suction pressure is low, we do not simply top up gas. We inject dry nitrogen at 250–350 PSI to pressurize the copper line, apply bubble leak detectors to flare joints and coil U-bends, braze any cracks, pull a deep vacuum below 500 microns, and weigh the exact charge.
Transparent cost ranges for common repairs. Charges are confirmed post on-site physical inspection.
| Fault / Component Replaced | Symptoms Observed | Indicative Price Range | Variables Affecting Final Quote |
|---|---|---|---|
| Capacitor Replacement | Outdoor fan spins but compressor does not start; loud humming sound | ₹350 - ₹950 | Capacitance value (35µF to 60µF), dual vs single capacitor, brand grade. |
| Indoor Blower Motor Fix / Replacement | No air coming from vents, E4/A6 error, burning motor smell | ₹1,400 - ₹3,200 | AC motor vs BLDC inverter motor, shaft length, OEM bracket fit. |
| Inverter Motherboard (PCB) Circuit Repair | Unit dead, outdoor unit completely unresponsive, blinking LED fault codes | ₹1,500 - ₹3,500 | Component-level trace repair (diodes/fuse/IPM) vs complete OEM board replacement. |
| Copper Leak Brazing & Gas Charging | Weak cooling, frost on outdoor thin pipe, hissing sound | ₹1,800 - ₹3,600 | Refrigerant gas type (R32, R410A, R22), gas weight in grams, leak location complexity. |
| Thermistor Sensor Replacement | AC runs non-stop or cuts off within 2 minutes; temperature display error | ₹450 - ₹1,100 | Dual coil and room harness, resistance calibration (5kΩ, 10kΩ, 15kΩ). |
| Compressor Replacement (1.5 Ton) | Tripped breaker instantly, grounded windings, seized mechanical pump | ₹6,500 - ₹12,000 | Fixed-speed rotary vs DC inverter compressor, copper filter drier, nitrogen flush. |
Real answers about common faults, repair safety, and parts warranty considerations.
If the indoor unit blows air but cooling is absent, the outdoor compressor is likely not engaging. Common culprits include a blown starting capacitor, low refrigerant pressure triggering a safety shut-off, an open-circuit thermistor, or an outdoor PCB communication glitch.
A failed capacitor often bulges at the top or reads zero microfarads on a multimeter, while the compressor motor windings test normal. If the compressor motor itself is grounded (continuity between terminal pins and the copper casing) or its internal valves are seized, the compressor is defective and requires replacement.
This symptom is known as short-cycling. It happens when the compressor overheats due to choked outdoor condenser fins, a failing outdoor fan motor that cannot reject heat, an overcharge of refrigerant, or a faulty room sensor that falsely tells the PCB the set temperature has been met.
Unlike copper, aluminium melts at a much lower temperature, making brazing micro-channel aluminium coils in the field extremely unreliable. While epoxy sealants provide temporary relief, permanent repair generally requires replacing the entire coil assembly with a 100% copper replacement coil.
Loud vibrations are caused by hardened or missing rubber anti-vibration mounting pads under the compressor feet, loose casing screws, bent outdoor fan blades, or broken internal suspension springs inside the hermetic compressor dome.
Turn the AC off immediately at the main breaker! A burning smell usually indicates overheating electrical wiring, loose terminal lug connections sparking, a locked indoor blower motor whose windings are melting insulation, or a failing PCB transformer.
R32 is classified as mildly flammable (A2L). It is completely safe when handled according to manufacturer standards. Vacuuming is critical because atmospheric air and moisture inside the refrigeration lines react with synthetic POE oil to create corrosive acids that strip copper plating and destroy compressor windings.
E1 and CH05 are serial communication errors. They indicate that the indoor control board and outdoor inverter power module cannot talk to each other. This is frequently caused by loose interconnecting communication cables, rat damage to signal wires, or blown optical couplers on the PCB.
Indoor coil freezing occurs when heat cannot be absorbed from the room. The two primary causes are choked air filters or a dead blower fan (zero airflow) and low refrigerant pressure that drops coil temperature below the freezing point of water.
Genuine replacement parts carry supplier-backed warranty coverage (typically 30 to 90 days depending on component type, such as capacitors, fan motors, and PCBs). Labour for the specific repair performed is also covered under a service warranty. Full terms are specified on your service invoice.
Yes. Specialized electronics technicians can test and replace blown rectifier bridge diodes, power transistors (IGBTs), optical couplers, and micro-fuses on the outdoor inverter driver board. Component-level repair typically costs between ₹1,500 and ₹3,500, avoiding the steep ₹6,000 to ₹12,000 cost of replacing the entire factory motherboard.
When line voltage drops below 190V, an electric motor draws proportionally higher current (amperage) to maintain torque. This excess current generates severe internal heat, degrading winding insulation varnish and triggering the internal thermal overload protector (OLP). Prolonged operation under low voltage burns starting capacitors and can permanently seize compressor bearings.
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