Is Your Water Heater No Longer Working Properly?
It is frustrating when your gas water heater or boiler no longer works as it should. Fortunately, in practice, most problems are not caused by a defective appliance, but by installation settings, water pressure, gas pressure, dirt, limescale build-up, or other external factors.
Our experience shows that in more than 80% of cases, the problem can be resolved on-site without sending the appliance in for repair. By following the troubleshooting guide below step by step, you can often save time, shipping costs, and unnecessary inspection charges. In many cases, you may even have hot water available again the same day.
We therefore always recommend that you:
Carefully read the user manual
Check the installation
Follow the troubleshooting guide below completely
Check for any error codes
Perform the recommended checks and solutions
➡ If you are unable to solve the problem using this troubleshooting guide, we will of course be happy to assist you further.
➡ Before returning an appliance for inspection or repair, we kindly ask you to complete the steps below first. This helps prevent a fully functional appliance from being returned unnecessarily and avoids possible inspection charges.
Let's start by identifying the problem.
The TTulpe B10 is equipped with electronic ignition and a flow sensor. As a result, the most common issues differ from those of the B-series models.
Water Heater Does Nothing
Check the following:
Water Connections
Cold water inlet on the RIGHT side
Hot water outlet on the LEFT side
Flow Sensor Blocked
Flush the water heater in reverse to clean the flow sensor.
Flow Sensor Connector Loose
Check that the flow sensor connector is securely connected.
Defective Flow Sensor
Replace the flow sensor if necessary.
Water Heater Shuts Off
Check:
Water pressure
Gas supply
Gas pressure regulator
The B10 flue gas safety sensor automatically resets itself after a few minutes.
Water Heater Makes a Popping Sound During Ignition
Possible causes:
Installed inside a small cabinet or enclosed space
Ignition electrode incorrectly adjusted
Ignition gap too large
Check the ignition electrodes or contact our technical support department.
TTulpe B10 Error Codes
Error Code E1
Ignition failure.
Check:
Gas supply available
Correct gas type (Propane/LPG)
Gas valve fully open
Gas pressure regulator correctly installed
Error Code E7
Flue gas exhaust problem.
Check:
At least 50 cm (20 inches) of vertical flue pipe before the first bend
No restrictions or narrowing in the flue
No corrugated flue pipes
Correct flue diameter
The flue must rise vertically for at least 50 cm before any bend is installed. For each additional bend, an extra 50 cm of vertical pipe should be added.
Need a flue system? Contact us for advice.
Error Code E8
Overheating protection activated.
Check:
Minimum water flow of 5 litres per minute
Correct gas pressure regulator
Correct gas type
Other Error Codes
Code Description
E2 Second ignition failure
E3 Electronic control board or EEPROM fault
E4 Outlet water temperature sensor fault
E5 Inlet water temperature sensor fault
E6 False flame signal detected
E9 Maximum operating time reached
Problem Not Solved?
Have you completed all of the checks above and is your gas water heater still not working correctly?
Please contact our technical support department and provide as much information as possible about your installation, appliance type, and the checks you have already carried out. In many cases, we can identify and resolve the problem remotely.
If repair is required, please visit our Returns & Repairs page for detailed instructions on how to submit a repair request and safely return your appliance.
➡ View the Returns & Repairs Procedure
Tip: Always include photos of the complete installation, water and gas connections, and any error messages when submitting a support request. This helps us assist you more quickly and often prevents unnecessary returns.