Frigidaire · Refrigerator Moderate

3 SH — Temperature Sensor Short

3 SH indicates a temperature sensor reading a short circuit (the "SH" suffix means shorted). Frigidaire uses the leading digit to identify which sensor (e.g., 1 SH and 2 SH for the fresh-food and freezer sensors); confirm which sensor the "3" slot maps to for your specific model before replacing it.

Keep using it?
Yes, with caution
DIY difficulty
Moderate
Verified against
frigidaire.com ↗

How to fix it

  1. Unplug refrigerator.
  2. Remove freezer back panel to access evaporator coil and its sensor clip.
  3. Ohm the sensor — replace if shorted.
  4. Inspect harness for shorts to chassis.
  5. Replace main board if sensor and wiring are good.

Why it happens

Typical signs: 3 SH displayed · Defrost cycles too short or skipped · Frost buildup on evaporator · Reduced cooling over time

  • Shorted evaporator thermistor Sensor failed closed.
  • Wiring short Wire grounded against the coil bracket.
  • Moisture damage Sensor mounted on cold coil sees condensation.

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.

  • Evaporator thermistor Common replacement
    Amazon →

More Frigidaire refrigerator codes

1F 1F — Ice Maker Fault 5Y CE 5Y CE — Communication Error (alt display) 5Y EF 5Y EF — Evaporator Fan Fault (alt display) CE CE — Communication Error (short) dF dF — Defrost Mode / Defrost Fault DI SP DI SP — Ice Jam in Dispenser

All Frigidaire codes → All refrigerator codes →

Frequently asked questions

What does the 3 SH code mean on a Frigidaire refrigerator?

3 SH indicates a temperature sensor reading a short circuit (the "SH" suffix means shorted). Frigidaire uses the leading digit to identify which sensor (e.g., 1 SH and 2 SH for the fresh-food and freezer sensors); confirm which sensor the "3" slot maps to for your specific model before replacing it.

What causes the 3 SH code on a Frigidaire refrigerator?

Shorted evaporator thermistor: Sensor failed closed. Wiring short: Wire grounded against the coil bracket. Moisture damage: Sensor mounted on cold coil sees condensation.

Is it safe to keep using a Frigidaire refrigerator with a 3 SH error?

Yes, with caution. This is rated a moderate-severity fault.

How do I fix 3 SH on a Frigidaire refrigerator?

Unplug refrigerator. Remove freezer back panel to access evaporator coil and its sensor clip. Ohm the sensor — replace if shorted.

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: frigidaire.com.