Truma Boiler B 10 / B 14
A liquid gas storage water heater designed for installation in caravans, motorhomes, and other recreational vehicles. The EL versions feature an additional 230 V, 850 W electric heating element to allow for dual-source or electric-only water heating.
View official manual on manufacturer's site ↗Technical Specifications
Gas Pressure Mbar30 mbar
Power Consumption 12v1.6 A (Fuse rating)
Power Consumption 230v850 W (EL models only)
Water Capacity Litres10 L (B 10) / 14 L (B 14)
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Possible Cause | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|---|
Hot water comes back out of the cold tap | Hot water flows back through the cold tap when pumps with high switching hysteresis are used. | — | Fit a non-return valve in the line between the drain valve and the cold tap outlet. | DIY Safe |
No 12 V electrical function / Control panel dead | Blown boiler fuse or incorrect electrical connection. | — | Check and replace the 1.6 A slow-acting fuse (IEC 127/2-III) located on the control p.c.b. Verify 12 V polarity (red = positive, blue = negative). | DIY Safe |
Risk of cable burning / Short circuit | Transposed electrical connections (reversed polarity). | — | Disconnect power immediately. Correct the wiring at the terminal (red to positive, blue to negative) and ensure the supply line is properly fused (5 - 10 A). | DIY Safe |
Frequently Asked Questions
Q: Can this boiler be installed in boats?
No - this standard model isn't approved for boats. Truma sells a dedicated DVGW-tested marine water heater for that.
Q: Can the water heater run with no water in the tank?
No - never run the water heater dry. A brief check of the electrical function with no water in it is fine, though.
Q: What type of water pumps can be used with this boiler?
Any pressure or submersible pump up to 2.8 bar can be used. With a submersible pump, fit a non-return valve after the pump, before the first branch.