How do I fill the Truma electric boiler?

  • Check whether the drain valve in the cold water supply is closed: lever horizontal, position (a).
  • Open the hot water tap in the bathroom or kitchen, set premixers or mixer taps to “warm”.
  • Switch on the power to the water pump (main switch or pump switch).
  • Leave the fittings open until the Truma electric boiler has been filled by displacing the air and water is flowing.
  • In frosty conditions, filling may be prevented by remaining frozen water. The boiler can be thawed by switching it on briefly (max. 2 minutes). Frozen pipes can be thawed by heating the interior.
a = lever position “closed”
b = lever position "drain"

Remember that the drain valve must be activated regularly to prevent limescale and ensure that it is not blocked.

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If you require information about Truma Service Centres in the UK, please contact Truma UK on:

Phone: 01283 587960

Service times
Monday – Friday 8.30 a.m. – 5.30 p.m.
Weekends and bank holidays: Closed

If you have a question about an appliance, always have information about the appliance type, year of manufacture and factory number at hand. You'll find this on the type plate on the appliance.

Truma type plate

Find your nearest Truma Expert.

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