E 202 HFuel unavailable or overheating protection active
The Combi did not receive fuel for ignition, or it shut down after overheating.
Plain-English answer
E 202 H belongs to Truma's group of fuel-supply and overheat faults. Closed propane valves and restricted warm-air circulation are the first owner-checkable causes.
What to check first
- 01
Check that both the propane cylinder and appliance shutoff valves are open.
- 02
Turn the system off and wait until it is completely cool.
- 03
Fill the water container with cold water and clear all warm-air and circulated-air openings.
Stop and call a technician when
- Stop immediately for propane odor, soot, or a damaged exhaust outlet.
- Do not repeatedly reset an error that returns.
Check the exact manual
Applicability: Truma Combi furnace and water-heater systems. The data plate and specification letter determine which procedure is correct.
Open Truma Combi error-code tech tip ↗Source reviewed August 2026Use the timing of E202H to choose the first safe check
Truma groups E 202 H with conditions involving unavailable fuel or active overheat protection. The code alone does not identify which one occurred, so note when it appears before resetting the appliance.
Check the gas supply path
Confirm the cylinder or gas bottle valve and the appliance shutoff valve are open. Do not loosen fittings, purge gas indoors, or continue if you smell fuel.
Let the Combi cool
Turn the unit off, allow it to cool completely, fill the water container with cold water, and clear blocked warm-air outlets and circulated-air intakes.
Stop if E202H returns
Record the operating mode and exact code. A repeated error needs model-specific Truma diagnosis rather than repeated resets or work inside the appliance.