Refrigerant leak detected
What it means
On a number of Carrier split units, EC means the protection system detected low refrigerant or a leak and shut the unit down. This is the common meaning and it can vary by model, so check the manual for your unit.
Symptoms3
- Weak cooling before the code appeared.
- Frost on the pipes or indoor unit.
- The unit stops after running for a while.
Possible causes4
- Leak at the pipe joints.
- Corrosion or a hole in one of the coils.
- Undercharged since installation.
- Faulty indoor coil temperature sensor.
How to diagnose and fix4
- Switch the unit off and do not keep restarting it.
- Ventilate and keep flames away if you notice hissing or an odd smell.
- Call a licensed refrigeration technician to locate and fix the leak and recharge.
- Do not handle refrigerant or fittings yourself.
Repair cost
In Saudi riyals; the highlighted part is the expected range for this fault.
A joint repair and recharge is far cheaper than replacing a coil or compressor.
Prices are rough estimates including the part and the technician’s fee, and vary with brand, model and part source.
Frequently asked questions
Could the code be false?
A failed sensor can cause it, but only a technician measuring pressures can confirm that.
Is regular gas top-up normal?
No; a healthy system does not use up refrigerant, so needing a top-up means there is a leak.
This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.
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