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.
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 (… E44H
Under-voltage: the supply voltage to the heater is too low (… E112H / E212H
Gas/flame fault group: the burner did not ignite or the flam… W18H
Warm-air outlet or circulated-air (return air) intake is blo… W25H–W29H
VarioHeat voltage and airflow warnings: W25H = overvoltage a…
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))
Note: 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.
● Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual.