A Daikin Refrigerant Leak, Found Section by Section
One room kept losing its cooling. We pressure tested each part of the system, found the leak in the indoor coil and replaced the coil under the manufacturer's parts warranty.
A room that rarely reached the set point
The system turned on and blew air, and the room got cooler, but it rarely reached the temperature on the thermostat. The homeowner suspected a refrigerant leak, so we tested each section of the system to find it.
Finding the leak, step by step
Check the system
Our technicians read the system pressures with digital gauges and inspected the outdoor unit and the indoor coil.
Test each section separately
We isolated the outdoor unit, the line set and the indoor coil and pressure tested each one with nitrogen. The outdoor unit and the line set held. The coil did not.
Use the parts warranty
The coil was covered by the manufacturer's parts warranty. We filed the claim, so the homeowner did not pay for the part.
What Cold Cloud Mechanical completed
- Pressure tested the outdoor unit, the line set and the evaporator coil separately to locate the leak.
- Processed the manufacturer's parts warranty claim for the coil.
- Replaced the leaking evaporator coil in the Daikin FXMQ48PBVJU fan coil.
- Pressure tested the complete system with nitrogen at 340–350 psi and left it under pressure overnight.
- Confirmed the next day that the pressure held, then evacuated the system to remove air and moisture.
- Charged the system with 12 lb 7.4 oz of R-410A.
The result
The leak was traced to one part, that part was replaced, and the system was proven tight overnight before any refrigerant went back in. That is how we approach every air conditioner repair: find the cause first, then fix it.
Does your system keep losing its cooling?
A slow loss of cooling often points to a refrigerant leak. We find where it is and fix the cause.
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