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Question DetailsAsked on 7/16/2012

What is the process for determining if there is a leak of refrigerant in an AC unit? I have central air that is not cooling effectively.

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Voted Best Answer

before you could determine if there is a leak your system must be running at min. 90% if it is not cooling you got to make sure you have the heat transfer at the evaporator, you got to make sure your evaporator is not impacted which limits the amount of heat transfer or not letting your unit cool the house and costing you aot more in electricity. If everything is up to par and your unit is low on feon . we will vacate the system and pressurize it and look for the leak with a leak detector or bubbles. if we are lucky the high pressure will find the leak and cure the problem. You just can not keep adding feon because the cost of feon is skyrocking.

raymond gonzalez
koolray heating and air


Answered 8 years ago by Raymond Gonzalez


I concur with Ray, system must be clean and operating properly to determine if the refrigerant level is indeed low, then we can determine leaks by one of two methods.
1. Evacuation and pressurization (described by Raymond) if the system is very low, or
2. Injection of UV dye and top off of refrigerant if the system slightly low, then a follow-up inspection is performed to find leak.
Niether are cheap, both are effective, depending on the scenario found at time of service,
Or depending on the age and/or efficiency of the system, you might consider replacement.

CSLB# 824188


Answered 8 years ago by AirTekHP

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