What does Al on boiler mean?

Low water pressure
AL 02 Low water pressure in system Restore pressure. Check for any leaks in the system.

How do you reset the low pressure on a boiler?

Open both valves, to allow cold mains water into the system (you should hear it) Wait for the pressure gauge to read 1.5 bar. Close both valves, one after the other. Switch the boiler back on and, if needed, press the reset button.

What is a boiler blocking error?

Blocking error The boiler will stop operating with no fault data displayed. The cause code, in the info menu, is accessed by pressing the spanner/return button. The condition will clear automatically when the associated fault clears e.g. waiting for an area to cool.

Can a boiler lose pressure without a leak?

Boilers That Lose Pressure When The Heating Is On When you switch on your heating pipes, fittings and radiators expand, and boiler pressure increases. So, a heating system might not leak when it’s off, but, a boiler could lose pressure when it’s on.

Why is my boiler reset button flashing?

Slowly flashing blue light, and a flashing lockout reset button – This usually means that there is a lockout with the ignition. Make sure that there is gas present and that your boiler is at the right pressure levels. Next, you want to check the Combustion CO2 level.

What is the Sime fault code for a boiler?

Fault Codes. Listed below are the common Sime fault codes as described by the boiler manufacturer along with a possible cause. AL 02 Low water pressure in system. Restore pressure. Check for any leaks in the system. AL 03 High water pressure in system. Empty the system via the drain valve on the.

Why is my Sime combi boiler not working?

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Is there a flashing code on my boiler?

No the boiler isn’t working, there’s a red flashing light and a flashing error code AL 02 which indicates low water pressure. Expert: Plumberpro replied 5 years ago.

Do you need to switch off boiler after pressing reset button?

As soon as I increased the water pressure up to around 2 the red light went out, but boiler is still not starting after pressing reset button – do I need to switch off for 5 mins again? Expert: Plumberpro replied 5 years ago.