Decoding the “Money Job”
In the HVAC world, we often call the EC Error a “Money Job.” This isn’t just a simple sensor malfunction or a dirty filter that you can clean yourself.
The EC code stands for Error in Cooling cycle, which almost exclusively points to a refrigerant leak. Your AC unit has lost the essential gas (like R-32 or R-410A) required to cool the air. Without this gas, the compressor works harder to compensate, risking burnout. The system detects this anomaly and shuts down, flashing “EC”.
1 Signs of a Leak
Ice Formation
Check the copper pipes on the outdoor unit. If you see white ice accumulating, gas pressure is low.
Warm Air Flow
The fan is running, but the air coming out feels like a normal fan, not an AC.
Oily Spots
Inspect pipe joints. Refrigerant oil often escapes with the gas, leaving dark, oily patches.
Technician Protocol
Do not attempt to just “top up” the gas. A professional repair follows this strict order:
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01.
Nitrogen Pressure Test Injecting high-pressure nitrogen to locate the microscopic hole in the coils or joints.
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02.
Brazing/Welding Sealing the leak point permanently using oxy-acetylene torches.
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03.
Vacuuming Removing all moisture and air from the lines. This is critical for cooling efficiency.
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04.
Gas Refill Filling exact refrigerant by weight (not just pressure).
Estimated Cost (India)
*Depending on gas type (R32/R410A) and leak severity.