If your AC runs constantly but blows warm air, refrigerant (often called by the brand name Freon) is a likely suspect. Here's what every homeowner should understand about refrigerant leaks.
Refrigerant doesn't get "used up"
This is the key thing: a properly working AC never needs more refrigerant. It circulates in a sealed loop. So if you're low, you have a leak — and simply adding more without fixing the leak just lets it escape again.
Signs of a refrigerant leak
- AC runs but blows warm or room-temperature air
- A hissing or bubbling sound (see our AC noises guide)
- Ice on the refrigerant lines or coil
- Higher energy bills with worse cooling
- The house takes much longer to cool
Why it's not a DIY job
Refrigerant is federally regulated and requires EPA-certified technicians to handle. Finding the leak takes specialized tools, and recharging requires precise measurement — not something you can safely or legally do from a hardware-store can.
What does it cost?
It depends on where the leak is and how much refrigerant is needed. A small, accessible leak is straightforward; a coil leak can be pricier. If your system uses the phased-out R-22, recharging is now very expensive — often the tipping point toward replacing the unit. We always give you the numbers upfront (see our repair cost guide).
Get it diagnosed properly
Thermo Master's EPA-certified techs find the leak, fix it, and recharge your system correctly across Palatine and the NW suburbs. Book an AC repair and get back to cold, reliable air.