Question 1

The water's taking a really long time to heat up

Accepted Answer

Possible cause: Water container furred.. Descale water system according to maintenance instructions.

Question 2

Water's running away - the boiler won't fill

Accepted Answer

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

Question 3

The boiler won't drain, even with the safety/drain valve open.

Accepted Answer

Possible cause: Safety/drain valve draining socket blocked.. Check the opening for dirt (slush, ice, leaves, etc.) and clear it if needed.

Question 4

Water's dripping or flowing from the safety/drain valve's drainage socket.

Accepted Answer

Possible cause: Water pressure too high.. Check the pump pressure doesn't exceed 2.8 bar. Fit a pressure reducer if the boiler's hooked up to mains water, to stop pressure climbing past that.

Question 5

The FrostControl opens after the heater's been switched off

Accepted Answer

Possible cause: Below roughly 3°C, the FrostControl opens on its own.. Switch the heater on - it won't close the FrostControl again until it warms up to around 7°C, unless the optional FrostControl heating element is fitted.

Question 6

The FrostControl won't close any more

Accepted Answer

Possible cause: Either the FrostControl's own temperature is below roughly 7°C, or the rotary switch isn't set to Operation.. Switch the heater on to bring the compartment up to around 7°C, then turn the rotary switch to Operation and press the pushbutton in until it clicks.

Question 7

There's heavy smoke on the cowl for over a minute after starting the appliance.

Accepted Answer

Possible cause: Fuel supply malfunction, improper installation, or limited combustion air infeed.. This is a fire hazard - stop using the appliance and contact an authorised service agent.

Truma Combi D 6 E

Technical Specifications

Master Troubleshooting & Diagnostics Matrix

Error Code / Indicator	Symptom / Meaning	Possible Cause	Step-by-Step DIY Fix	Suggested Actions
`N/A`	The water's taking a really long time to heat up	Water container furred.	Descale water system according to maintenance instructions.	DIY Safe
`N/A`	Water's running away - the boiler won't fill	Safety/drain valve open.	Close safety/drain valve.	DIY Safe
`N/A`	The boiler won't drain, even with the safety/drain valve open.	Safety/drain valve draining socket blocked.	Check the opening for dirt (slush, ice, leaves, etc.) and clear it if needed.	DIY Safe
`N/A`	Water's dripping or flowing from the safety/drain valve's drainage socket.	Water pressure too high.	Check the pump pressure doesn't exceed 2.8 bar. Fit a pressure reducer if the boiler's hooked up to mains water, to stop pressure climbing past that.	DIY Safe
`N/A`	The FrostControl opens after the heater's been switched off	Below roughly 3°C, the FrostControl opens on its own.	Switch the heater on - it won't close the FrostControl again until it warms up to around 7°C, unless the optional FrostControl heating element is fitted.	DIY Safe
`N/A`	The FrostControl won't close any more	Either the FrostControl's own temperature is below roughly 7°C, or the rotary switch isn't set to Operation.	Switch the heater on to bring the compartment up to around 7°C, then turn the rotary switch to Operation and press the pushbutton in until it clicks.	DIY Safe
`N/A`	There's heavy smoke on the cowl for over a minute after starting the appliance.	Fuel supply malfunction, improper installation, or limited combustion air infeed.	This is a fire hazard - stop using the appliance and contact an authorised service agent.	Professional Intervention Required