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
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
Frequently asked questions
What does the E1 code mean on a Bosch refrigerator?
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.
What causes the E1 code on a Bosch refrigerator?
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.
Is it safe to keep using a Bosch refrigerator with a E1 error?
Yes, with caution. This is rated a moderate-severity fault.
How do I fix E1 on a Bosch refrigerator?
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).
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.