Question 1

Water is not heating.

Accepted Answer

Possible cause: No operating voltage.. Restore the power supply.

Question 2

Water is not heating.

Accepted Answer

Possible cause: Operation without water; the overheating safety switch has shut off the heater.. Switch off the appliance, wait 10 minutes, fill the water system, and switch the appliance back on.

Question 3

Extremely long heating time.

Accepted Answer

Possible cause: Water tank is scaled up.. Descale the water system (see maintenance instructions).

Question 4

Water runs away – boiler cannot be filled.

Accepted Answer

Possible cause: Safety/drain valve is open.. Close the safety/drain valve.

Question 5

Boiler cannot be drained even though the safety/drain valve is open.

Accepted Answer

Possible cause: The drainage outlet of the safety/drain valve is blocked.. Check the opening for any debris (such as slush, ice, or leaves) and clean the opening if necessary.

Question 6

Boiler cannot be drained even though the safety/drain valve is open.

Accepted Answer

Possible cause: The ventilation hose is blocked.. Check the hose opening (refer to the upper section).

Question 7

Water is dripping from the drainage outlet of the safety/drain valve.

Accepted Answer

Possible cause: The elbow fitting on the boiler is bent.. Check the hose for any kinks and straighten the hose.

Question 8

Water is dripping from the drainage outlet of the safety/drain valve.

Accepted Answer

Possible cause: Water pressure is too high.. Check the pump pressure (max. 2.8 bar). When connecting to a central water supply (country or city connection), a pressure reducer must be used to prevent pressures above 2.8 bar from developing in the boiler. If these steps do not resolve the fault, contact an authorised service agent.

Error Code / Indicator	Symptom / Meaning	Step-by-Step DIY Fix	Suggested Actions
`N/A`	Water is not heating. Possible Cause: No operating voltage.	Restore the power supply.	DIY Safe
`N/A`	Water is not heating. Possible Cause: Operation without water; the overheating safety switch has shut off the heater.	Switch off the appliance, wait 10 minutes, fill the water system, and switch the appliance back on.	DIY Safe
`N/A`	Extremely long heating time. Possible Cause: Water tank is scaled up.	Descale the water system (see maintenance instructions).	DIY Safe
`N/A`	Water runs away – boiler cannot be filled. Possible Cause: Safety/drain valve is open.	Close the safety/drain valve.	DIY Safe
`N/A`	Boiler cannot be drained even though the safety/drain valve is open. Possible Cause: The drainage outlet of the safety/drain valve is blocked.	Check the opening for any debris (such as slush, ice, or leaves) and clean the opening if necessary.	DIY Safe
`N/A`	Boiler cannot be drained even though the safety/drain valve is open. Possible Cause: The ventilation hose is blocked.	Check the hose opening (refer to the upper section).	DIY Safe
`N/A`	Water is dripping from the drainage outlet of the safety/drain valve. Possible Cause: The elbow fitting on the boiler is bent.	Check the hose for any kinks and straighten the hose.	DIY Safe
`N/A`	Water is dripping from the drainage outlet of the safety/drain valve. Possible Cause: Water pressure is too high.	Check the pump pressure (max. 2.8 bar). When connecting to a central water supply (country or city connection), a pressure reducer must be used to prevent pressures above 2.8 bar from developing in the boiler. If these steps do not resolve the fault, contact an authorised service agent.	DIY Check / Tech Fallback

Truma BE 14

Technical Specifications

Master Troubleshooting & Diagnostics Matrix