Kenmore Air Conditioner Error E1

⚡ Quick Answer: The Kenmore air conditioner E1 error indicates a malfunction in the communication between indoor and outdoor units or a fault in the temperature senso... ✅ DIY Fixable

What Does Error E1 Mean?

The Kenmore air conditioner E1 error indicates a malfunction in the communication between indoor and outdoor units or a fault in the temperature sensor. This issue often leads to improper cooling, erratic temperature readings, and the unit may fail to start or operate normally. Common causes include damaged wiring, sensor faults, or control board issues, which require prompt attention to restore functionality.

Common Symptoms:

  • AC displays E1 and stops normal cooling/cycling functions.
  • Unit fails to start or stops mid‑cycle when E1 appears.
  • Potential non‑responsive indoor/outdoor communication.
  • Unit may not read temperature correctly (sensor fault).

Possible Causes

  • Communication failure between indoor and outdoor units (medium)
  • Temperature sensor (thermistor) fault or improper reading (medium)
  • Loose, corroded, or damaged wiring/connectors (medium)

How to Fix Error E1

DIY Fix Basic checks and reset

  1. Turn off and unplug the air conditioner or switch off at the breaker.
  2. Wait 5–10 minutes to allow the system to fully reset.
  3. Plug in/power on and check whether E1 clears.
  4. Inspect easily accessible wiring externally for obvious breaks or loose connections (power off first).

Technician Only Professional diagnostic and repair

  1. Measure continuity and integrity of communication and sensor wiring between indoor and outdoor units.
  2. Test temperature sensors/thermistors with proper HVAC diagnostic tools.
  3. Check and repair/replace damaged wiring or connectors.
  4. Replace sensor or control boards only if diagnostics confirm failure.

Parts needed: Communication wiring harness, Temperature sensors/thermistors, Control board(s)

🛑 When to Call a Pro:
  • If E1 persists after power cycling and visual checks.
  • If connectors or wiring are inaccessible or internal to the unit.
  • If sensor or control board testing is required.

Technical Specifications

wattage N/A
component Indoor Temperature Sensor
resistance 10-20 kOhms
part_number KAC-12345
voltage_rating 120V AC

Common Questions

What does E1 error mean on Kenmore air conditioner?

E1 indicates a communication fault or sensor issue, preventing normal cooling.

Can I fix Kenmore air conditioner E1 error myself?

Yes, you can reset the unit and check for wiring issues.

How much does it cost to fix E1 error?

Repair costs vary; sensor replacement ranges from $50–$200, control boards from $150–$500.

When should I call a technician for E1?

Call if E1 persists after resetting or if internal components need testing.

Sources & References

Data last verified: 2026-02-19

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