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HVAC glossary

Leak check

A leak check is an inspection of the refrigerant circuit by a specialist to confirm that the system is not leaking.

A leak check is carried out when the system is installed and later during operation. During installation the circuit is tested before it is charged with refrigerant; in a working system a check is needed if a leak is suspected, or at the intervals set by law depending on the refrigerant charge and type.

Signs that it is worth calling a specialist:

  • the system heats or cools less than before;
  • unusual frost or oil marks appear on joints or outdoor unit pipes;
  • the controller shows an error code.

The refrigerant circuit is a pressurised system, so checks, pressure tests or topping up refrigerant must never be done yourself – it is dangerous and under EU F-gas rules is reserved for qualified, certified specialists. Simply “topping up the gas” without finding the leak is not a solution.

If you notice any of these signs, submit a service request – our specialists will assess the system condition and propose the next steps.

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