Dometic Refrigerator: “05 / W05”
warning RV refrigerator error codes
What it means
AC (230 V mains) power problem: the fridge is set to run on AC but either no AC is connected or the AC voltage is too low (the 10-Series manual lists the threshold as under ~190 V). On the European 10-Series this is a 'warning' (W05) that clears on its own once power returns; on the RUA platform it appears simply as fault 05.
Most likely causes
- Shore/mains power unplugged, tripped breaker, or the campsite/inverter supply is off most likely
- Low/sagging AC voltage (long extension lead, weak generator or inverter) common
- Blown AC fuse on the fridge power board or a loose AC connector at the rear of the unit less common
- Failed AC heating element or power module rare
Safe checks you can do yourself
- Confirm the RV is actually connected to live shore/mains power and the breaker for the fridge circuit is on.
- If on a generator or inverter, check it is running and delivering stable, full voltage.
- Try a known-good outlet or a shorter, heavier-gauge power lead and see if the code clears.
- Visually check that the AC plug/connector at the back of the fridge is fully seated (only if you can reach it safely with power off).
How to reset / clear 05 / W05
- On RUA models: press and hold the encoder/control knob about 3 seconds until you hear a beep — do NOT hold too long or you will switch the fridge off instead of resetting.
- On 10-Series models: W-warnings normally clear automatically once AC power is restored; if needed press the control knob ~2 seconds.
When to call a technician
AC power is confirmed present and at correct voltage but the code keeps returning, or the fridge will not cool on AC — this points to a failed AC element, fuse, or power module.
Applies to
Dometic RUA series · Dometic 10-Series (RM10.5, RMD10.5, RMS10.5 incl. T/S/XT variants)
FAQ
What does Dometic Refrigerator code "05 / W05" mean?
AC (230 V mains) power problem: the fridge is set to run on AC but either no AC is connected or the AC voltage is too low (the 10-Series manual lists the threshold as under ~190 V). On the European 10-Series this is a 'warning' (W05) that clears on its own once power returns; on the RUA platform it appears simply as fault 05.
How do I reset Dometic Refrigerator 05 / W05?
On RUA models: press and hold the encoder/control knob about 3 seconds until you hear a beep — do NOT hold too long or you will switch the fridge off instead of resetting. On 10-Series models: W-warnings normally clear automatically once AC power is restored; if needed press the control knob ~2 seconds.
What is the most common cause of 05 / W05 on a Dometic Refrigerator?
The most likely cause is shore/mains power unplugged, tripped breaker, or the campsite/inverter supply is off.
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Sources
- Display shows fault: 05 — RUA Refrigerators — RUA refrigerator fault 05 support page (Dometic (official product support))
- Dometic 10-Series Operating Manual (troubleshooting, p.29) — 10-Series operating manual, fault table W05 (Dometic / ManualsLib)
Note: Code label differs by platform: North American/European RUA shows '05'; the 10-Series shows 'W05'. The <190 V threshold is from the 10-Series manual and may differ on other model lines.
● Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual.