Radiator/heater

If the radiator, or just the top of the radiator, remains cold, this may be because there is air in the radiator. The solution to this problem is to bleed the radiator. For this you will need a bleed key and a towel:

• Insert the key into the nipple and turn it open a little
• Keep the cloth underneath
• Let the air escape until a small stream comes out
• Close it again

If the problem has not yet been resolved, it may be because the radiator knob is stuck:

• Remove the knob, you will see a small pin going into the tap housing
• Press the back of a screwdriver against the pin several times until it no longer becomes stiff
• Put the button back on