Truma Furnace: “E2H / E16H”
warning RV furnace fault codes
What it means
VarioHeat ignition/flame fault: the furnace released gas and attempted ignition but no flame was detected. E2H and E16H cover the same family of causes — closed or empty gas supply, regulator icing, too much butane in cold weather, or a blocked combustion-air intake or exhaust.
Most likely causes
- Propane cylinder empty or cylinder/quick-acting valve closed most likely
- Combustion-air intake or exhaust cowl blocked common
- Regulator iced up or high butane content in cold weather common
- Several failed ignition attempts causing a lockout less common
Safe checks you can do yourself
- Confirm there is propane and the cylinder valve plus quick-acting valve are open.
- Light another propane appliance to prove gas is reaching the coach.
- Inspect and clear the exterior air/exhaust cowl of ice, snow or debris.
- In cold weather, use propane and consider a regulator heater.
How to reset / clear E2H / E16H
- Fix the gas or airflow cause first.
- Switch the VarioHeat off at the CP plus panel and back on to re-attempt ignition.
- Allow a brief wait if the unit has locked out after repeated tries.
When to call a technician
Gas is confirmed available and the cowl is clear but the furnace still fails to detect flame.
Accuracy notes
VarioHeat is an air furnace (no water side), so its codes differ from Combi; E2H/E16H are the VarioHeat equivalents of the Combi gas-supply group.
Applies to
Truma VarioHeat eco · Truma VarioHeat comfort · CP plus control panel
FAQ
What does Truma Furnace code "E2H / E16H" mean?
VarioHeat ignition/flame fault: the furnace released gas and attempted ignition but no flame was detected. E2H and E16H cover the same family of causes — closed or empty gas supply, regulator icing, too much butane in cold weather, or a blocked combustion-air intake or exhaust.
How do I reset Truma Furnace E2H / E16H?
Fix the gas or airflow cause first. Switch the VarioHeat off at the CP plus panel and back on to re-attempt ignition. Allow a brief wait if the unit has locked out after repeated tries.
What is the most common cause of E2H / E16H on a Truma Furnace?
The most likely cause is propane cylinder empty or cylinder/quick-acting valve closed.
Related · Truma furnace
Over-voltage: the supply voltage to the heater is too high (Truma cites… E44H
Under-voltage: the supply voltage to the heater is too low (Truma cites… E112H / E212H
Gas/flame fault group: the burner did not ignite or the flame was not… W18H
Warm-air outlet or circulated-air (return air) intake is blocked, so the… W25H–W29H
VarioHeat voltage and airflow warnings: W25H = overvoltage above ~16.4…
Sources
- Truma Tech Tip: Common VarioHeat Error Codes — VarioHeat error-code tech tip (E2H/E16H) (Truma North America)
- Truma CP plus VarioHeat Operating Instructions — Troubleshooting Chart VarioHeat (H) — CP plus VarioHeat troubleshooting chart, codes E2H/E16H (Truma (OEM-hosted, ManualsLib))
● Checked against 2 manufacturer documents · Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual. How we verify