E1 — Fresh-Food Compartment Sensor Fault
Bosch's official US refrigeration error-code page documents only three entries: E02 (icemaker/ice-water communication), E03 (dispenser UI), and a generic 'E or D' catch-all. A bare 'E1' is not separately documented. The 'fresh-food sensor fault' explanation below is not confirmed on Bosch's US consumer page — verify against your model's manual, or treat it per Bosch's generic guidance: power-cycle, and call support if it persists.
- Keep using it?
- Yes, with caution
- DIY difficulty
- Moderate
- Verified against
- bosch-home.com ↗
How to fix it
- Press and hold the alarm/Mute button to silence; note the exact code shown.
- Unplug the refrigerator for 5 minutes to attempt a soft reset.
- If the code returns, locate the fresh-food thermistor (usually clipped to the rear evaporator cover inside the fridge cavity).
- Inspect the harness and connector for moisture, corrosion, or backed-out pins; reseat firmly.
- With the unit unplugged, measure thermistor resistance at room temperature against the spec in the tech sheet behind the kick plate.
- Replace the thermistor if out of range; if in range and wiring is good, replace the main control board.
Why it happens
Typical signs: E1 shown on display · Fridge running too warm or too cold · Compressor cycling abnormally · Temperature setting will not hold
- Failed fresh-food thermistor Sensor reads open or shorted out of spec (should be roughly 5-30k ohms at typical fridge temps).
- Loose or corroded sensor harness connector Connector at the sensor or main board has backed out, moisture has corroded pins, or a wire is broken inside the insulation.
- Damaged wiring in the door hinge or rear channel Repeated flexing or a pinch during a prior repair can break a conductor.
- Failed main control board input Sensor input circuit on the PCB is damaged (less common than a bad sensor).
Replace your water filter
A clogged or overdue water filter is a common cause of low water and ice flow on Bosch refrigerators — they are meant to be changed about every 6 months. The OEM-style filter that fits most Bosch refrigerators is the BORPLFTR10 ($60-75 OEM, $25-35 compatible).
- Bosch BORPLFTR10 refrigerator water filter OEM water filterAmazon →
Not sure which filter fits your model? See the full compatibility guide →
Parts you may need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
More Bosch refrigerator codes
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: bosch-home.com.