Gurgling noises or cold spots — Air in heating system

What does Air in system mean?

Air trapped within the heat transfer or heating system can cause gurgling sounds, cold spots in radiators, and reduced heating efficiency.

• Air ingress during system maintenance or normal operation.
• Insufficient venting of the heating system.

Click steps to track your progress.

1. 1

   Vent your heating system and radiators according to the instructions in your main user manual.

2. 2

   After venting, check the system pressure and top up with water if necessary.

3. 3

   Monitor the heating performance and repeat venting if air accumulation continues.