Error Furnace cannot be switched on: Fuse blown or overheating protection switch triggered.

Change the 12V or 120V fuse, or reset the 120V AC overheating protection switch.

Error Error E 560: No flame detected after repeat start attempts during fuel line filling or startup.

Acknowledge the error message on the control panel and make a new start attempt. After 5 unsuccessful attempts, customer service must unlock the system.

Error The water's taking a really long time to heat up: Water container scaled up.

Descale the water system with a commercial descaler, vinegar essence, or citric acid.

Error Water's draining away - the water container won't fill: Pressure relief / drain valve open.

Close the pressure relief / drain valve.

Error Heavy smoke at the wall cowl continuing well past a minute after starting: Fault in fuel supply, improper installation, or combustion air inlet restricted.

This is a fire hazard - stop using the appliance immediately and contact customer service.

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Truma • Space Heater

Truma Combi G comfort / Truma Combi G comfort plus

The Truma Combi G is a warm-air furnace with an integrated 2.6 Gal. (10 litre) water container designed for motor homes and caravans. It provides simultaneous space heating and hot water using gasoline fuel, with electric and mixed modes available on the comfort plus model.

View official manual on manufacturer's site ↗

Technical Specifications

Power Consumption 12v0.4 - 8.1 A

Power Consumption 230v7.1 A (850W) / 14.2 A (1700W)

Water Capacity Litres10 litres

Weight Kg15.6 kg (16.8 kg with periphery)

Master Troubleshooting & Diagnostics Matrix

Error Code / Indicator	Symptom / Meaning	Possible Cause	Step-by-Step DIY Fix	Suggested Actions
`Furnace cannot be switched on`	Fuse blown or overheating protection switch triggered.	—	Change the 12V or 120V fuse, or reset the 120V AC overheating protection switch.	DIY Safe
`Error E 560`	No flame detected after repeat start attempts during fuel line filling or startup.	—	Acknowledge the error message on the control panel and make a new start attempt. After 5 unsuccessful attempts, customer service must unlock the system.	DIY Check / Tech Fallback
`The water's taking a really long time to heat up`	Water container scaled up.	—	Descale the water system with a commercial descaler, vinegar essence, or citric acid.	DIY Safe
`Water's draining away - the water container won't fill`	Pressure relief / drain valve open.	—	Close the pressure relief / drain valve.	DIY Safe
`Heavy smoke at the wall cowl continuing well past a minute after starting`	Fault in fuel supply, improper installation, or combustion air inlet restricted.	—	This is a fire hazard - stop using the appliance immediately and contact customer service.	Professional Intervention Required

Frequently Asked Questions

Q: Can the furnace run while the vehicle is moving?

No - the furnace mustn't be used while the vehicle's in motion.

Q: What kind of fuel does the furnace require?

It runs on gasoline meeting ASTM D4814, with up to 10% ethanol, up to 3% methanol, and no metal-based additives.

Q: What should I do if there's a risk of frost?

Fully drain the water container through the pressure relief/drain valve and leave it open, so no water's left to freeze.