Teco Air Conditioner Error P4

⚡ Quick Answer: The TECO Air Conditioner error code P4 indicates a compressor protection failure due to high pressure in the condenser circuit. This often results in ... ✅ DIY Fixable

What Does Error P4 Mean?

The TECO Air Conditioner error code P4 indicates a compressor protection failure due to high pressure in the condenser circuit. This often results in the unit stopping cooling and displaying P4 on the indoor panel. You may also notice unusual sounds from the compressor or outdoor fan before the unit shuts down. Common causes include restricted airflow from dirty condenser fins or high ambient temperatures that exceed safe pressure limits.

Common Symptoms:

  • Unit stops cooling and displays P4 on the indoor unit display panel
  • Outdoor unit may run but cooling performance abruptly stops
  • Possible loud compressor or outdoor fan stress prior to shutdown

Possible Causes

  • High condenser pressure due to restricted airflow or dirty condenser fins (medium)
  • High ambient temperature increasing condenser pressure beyond safe limits (medium)

How to Fix Error P4

DIY Fix Check and clean outdoor condenser unit

  1. Turn off AC and disconnect power.
  2. Inspect outdoor condenser fins for dirt, leaves, or debris.
  3. Gently clean fins with a soft brush or low‑pressure hose.
  4. Ensure clearance around the unit for proper airflow.

Technician Only Diagnose and service high pressure protection trip

  1. Measure refrigerant high and low side pressures to check for abnormal high condenser pressure.
  2. Verify outdoor fan motor operation and condenser airflow.
  3. Inspect and clean condenser coil thoroughly; straighten any bent fins.
  4. Check refrigerant charge level and for restrictions in the line (e.g., blockage in filter drier).
  5. Test pressure sensor and related control circuitry for faults.

Parts needed: Condenser coil, Outdoor fan motor / capacitor, Pressure transducer or sensor, Filter drier (if clogged)

🛑 When to Call a Pro:
  • If the unit repeatedly trips P4 after cleaning the condenser or in normal ambient conditions
  • If there are signs of refrigerant leakage, oil stains, or burning smells
  • If outdoor fan does not run properly

Technical Specifications

wattage 1500W
component Compressor
resistance 5-10 ohms
part_number TECO-COMP-12345
voltage_rating 220V AC

Common Questions

What does P4 error mean on TECO Air Conditioner?

P4 indicates a compressor protection failure due to high pressure in the condenser, causing the unit to stop cooling.

Can I fix TECO Air Conditioner P4 error myself?

Yes, you can check and clean the outdoor condenser unit by removing dirt and debris.

How much does it cost to fix P4 error?

Repair costs for the P4 error range from ¥10,000 to ¥50,000+, depending on parts and region.

When should I call a technician for P4?

Call a technician if P4 persists after cleaning, if you notice refrigerant leakage, or if the outdoor fan isn't functioning properly.

Data last verified: 2026-07-07

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