Espar (Eberspächer) Furnace: “047 / 048”
warning RV furnace fault codes
What it means
Metering (fuel dosing) pump fault: 047 = short circuit / overload on the pump output, 048 = open circuit / interruption (pump or its wiring disconnected). Without a working metering pump the heater cannot dose fuel and will not run.
Most likely causes
- Damaged or disconnected metering pump wiring/connector (048) most likely
- Shorted pump winding or chafed wiring (047) common
- Failed metering pump common
Safe checks you can do yourself
- Locate the metering (dosing) pump on the fuel line and check its connector and wiring for damage or corrosion.
- Confirm the connector is fully seated.
- Listen for the characteristic ticking of the pump during a start attempt; silence suggests an open circuit.
How to reset / clear 047 / 048
- Switch off and on to retry.
- If the fault persists, the pump and wiring must be tested by an installer.
When to call a technician
If wiring and connector are good but the pump does not tick or the fault persists.
Applies to
Airtronic D2 · Airtronic D4 · Airtronic D4S · Airtronic B4
FAQ
What does Espar (Eberspächer) Furnace code "047 / 048" mean?
Metering (fuel dosing) pump fault: 047 = short circuit / overload on the pump output, 048 = open circuit / interruption (pump or its wiring disconnected). Without a working metering pump the heater cannot dose fuel and will not run.
How do I reset Espar (Eberspächer) Furnace 047 / 048?
Switch off and on to retry. If the fault persists, the pump and wiring must be tested by an installer.
What is the most common cause of 047 / 048 on a Espar (Eberspächer) Furnace?
The most likely cause is damaged or disconnected metering pump wiring/connector (048).
Related · Espar (Eberspächer) furnace
Overheating detected by software: the outlet (heat-exchanger… 017
Overheat shutdown. The temperature measured at the overheat … 019
Glow plug (glow pin) energy too low: the glow plug is not de… 020 / 021 / 022
Glow plug electrical fault: 020 = open circuit / interruptio… 050
Operating lockout: too many unsuccessful start attempts. Aft… 052
Unsuccessful start (no flame established). The heater attemp…
Sources
- Eberspacher Airtronic Fault Codes — Code 47 (fuel pump short/overload), 48 (fuel pump open circuit) (Le Tonkinois (independent Eberspacher reference))
- Find and clear Espar Airtronic fault codes and Eberspacher Hydronic fault codes — Fuel system & metering pump, P000201 (047) short, P000200 (048) interruption (Heatso)
Note: Newer CAN controllers show P000200/P000201. A related code 049 covers short to battery+ / transistor fault.
● Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual.