The handle of the multitool should be held inside your fist, with your fingers wrapping around the grip on the bottom of the handle. The shaft of the multitool should be protruding from the gap between your fingers.
If you’re old enough to be a wine drinker, then you’ll find this very similar to holding a corkscrew, in terms of grip.
Power off
Before you do anything to your boiler pump, make sure the power is switched off and cannot be accidentally reconnected.
Tightening and loosening retaining screws
You’ll need to choose one of the allen key bits for the multitool. Check which size fits the screw you want to tighten or loosen and slide it into the bit holder so that your chosen tip is sticking out of the holder.
Insert the tool bit into the screw.
Turn it clockwise to tighten it and anti-clockwise to loosen it.
Tightening and loosening a bleed screw cover plate
For this task, you will need to remove the bit that is currently in your bit holder and flip the tool upside down.
Insert the wide, flat bit on the handle into the groove in the bleed screw.
Twist anti-clockwise to loosen it and clockwise to tighten it.
If your bleed screw is smaller, don’t worry about flipping your tool. Just use the flat 4mm bit.
Turning the rotor shaft
To access the rotor shaft, you will need to remove the bleed screw cover plate using the flat bit on the handle of the multitool.
If you look into the slot you just exposed, you should see a groove where you can insert a flat screwdriver bit.
Fit the bit holder with the 4mm (5/32″) flat screwdriver bit. Gently turn the rotor shaft anti-clockwise. You should now be able to tell whether or not the impellor moves smoothly or if there is something jamming it.