A system low on refrigerant — almost always due to a leak — can’t move heat effectively and may damage itself if left unchecked. Recognising the signs early protects the equipment and saves energy.
Common signs
- Poor or warm cooling — the system runs but doesn’t cool properly
- Ice or frost on the evaporator coil or suction line
- Longer run times and higher energy bills
- Hissing or bubbling noises, which can indicate a leak
- Low suction pressure with high superheat on the gauges
Why it happens
Refrigerant doesn’t get ‘used up’ — a sealed system shouldn’t lose it. If a system is low, there’s a leak somewhere that needs finding and fixing.
The right fix
Never simply top up a leaking system. Locate and repair the leak, then evacuate and recharge to the correct weight. Topping up alone wastes refrigerant, breaches F-Gas rules and only delays the inevitable failure.
FAQ
Can low refrigerant damage a compressor? Yes — refrigerant carries the compressor’s oil, so running low can cause overheating and lubrication problems.
Browse refrigerants and leak-repair supplies in our shop.