Gain access to system as required
Observation:
Confirm the system is correctly filled and appliance / system is vented of all air.
If a sealed system, ensure system pressure is set correctly 1-1.5 bar when cool.
If an open vented system, check header tank and cold feed etc.
If a sealed system, ensure system pressure is set correctly 1-1.5 bar when cool.
If an open vented system, check header tank and cold feed etc.
