Dometic Refrigerator: “1 red LED flash”
warning RV refrigerator error codes
What it means
Voltage fault. The DC supply voltage reaching the fridge is outside the range the electronics will run on (too low or too high). The compressor electronics shut the unit down to protect themselves.
Most likely causes
- Low house/leisure battery state of charge dragging voltage below the cutout threshold most likely
- Voltage drop across undersized or long DC supply cabling, loose terminals, or a corroded ground common
- Blown or weak inline fuse / poor connector contact in the 12V feed common
- Charger/converter or alternator output spiking above the allowed range less common
Safe checks you can do yourself
- Measure DC voltage at the fridge's power terminals (not just at the battery) with a multimeter while the fridge tries to start, and compare against the input range on the rating label.
- Charge or swap the leisure battery and retry once it is at a healthy voltage.
- Inspect the inline fuse, plug/connector, and ground connection for corrosion, looseness, or melting.
- Confirm the supply wire gauge is adequate for the cable run length per the installation manual to limit voltage drop.
How to reset / clear 1 red LED flash
- Restore a stable in-range supply voltage.
- Turn the fridge off, disconnect power for about a minute, then reconnect.
- Switch the fridge back on; the error LED should clear once voltage is within range.
When to call a technician
Voltage measures correctly in range at the fridge terminals but the 1-flash fault persists, indicating the control electronics may be faulty.
Applies to
CRX50 · CRX65 · CRX80 · CRX110 · CRX140 · CRX0050 · CRX0065 · CRX0080 · CRX0110 · CRX1050 · CRX1065 · CRX1080 · CRX1110 · CRX1140 · NRX0035 · NRX0050 · NRX0060 · NRX0080 · NRX0115 · NRX0130 · NRX1035 · NRX1050 · NRX1060 · NRX1080 · NRX1115 · NRX1130
FAQ
What does Dometic Refrigerator code "1 red LED flash" mean?
Voltage fault. The DC supply voltage reaching the fridge is outside the range the electronics will run on (too low or too high). The compressor electronics shut the unit down to protect themselves.
How do I reset Dometic Refrigerator 1 red LED flash?
Restore a stable in-range supply voltage. Turn the fridge off, disconnect power for about a minute, then reconnect. Switch the fridge back on; the error LED should clear once voltage is within range.
What is the most common cause of 1 red LED flash on a Dometic Refrigerator?
The most likely cause is low house/leisure battery state of charge dragging voltage below the cutout threshold.
Related · Dometic refrigerator
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The motor (compressor) does not start. The electronics tried… 4 red LED flashes
Compressor speed too low. The cooling system is so heavily l… 05 / W05
AC (230 V mains) power problem: the fridge is set to run on … 5 red LED flashes
Overheating of the electronics unit. The compressor's contro… 06 / W06
DC (12 V) power problem: the fridge expects a 12 V supply bu…
Sources
- Dometic CRX 50/65/80/110/140 Installation and Operating Manual — Troubleshooting, error indicator LED flash table (4445103628) (Dometic)
- Dometic NRX 35-130 Operating Manual (AMER) — Troubleshooting, flashing frequency / error table (4445103632) (Dometic)
Note: Dometic labels this 'Under or over voltage' (NRX) / 'Low Voltage' (CRX). The exact cutout/restart voltages depend on the battery-protection setting selected on the unit.
● Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual.