Tadiran AC Error Code F2 — Discharge Pipe Sensor Fault

What Does This Error Mean?

F2 on a Tadiran AC means the discharge pipe thermistor — the sensor clamped to the hot refrigerant pipe leaving the compressor — has a fault. This is a critical compressor protection sensor. The AC shuts down immediately when this sensor fails because the compressor cannot be safely protected without it.

Affected Models

Tadiran Inverter Split AC
Tadiran Breeze Series
Tadiran T-MAX Series
Tadiran Coral Series
Tadiran Split AC (all inverter models)

Common Causes

Discharge pipe thermistor failed — resistance value outside specification
Thermistor probe has come loose from the discharge pipe clamp
Connector at the outdoor PCB corroded or disconnected
Thermistor wiring damaged inside the outdoor unit
Outdoor PCB fault misreading the sensor signal

How to Fix It

Turn off the AC and switch off the circuit breaker.

Do not repeatedly restart the AC — running the compressor without a working discharge thermistor risks overheating the compressor.
Attempt one power cycle after 5 minutes.

If F2 clears and the AC runs normally, the fault may have been a transient glitch. If F2 returns, call a technician.
Book a Tadiran authorised service visit.

The discharge thermistor is an inexpensive part — prompt replacement protects the much more expensive compressor.

When to Call a Professional

F2 requires a licensed HVAC technician. The discharge pipe is a high-temperature, high-pressure refrigerant line inside the outdoor unit. Do not attempt to access this area yourself.

Frequently Asked Questions

What does the discharge pipe thermistor protect against on a Tadiran AC?

The discharge thermistor monitors the temperature of compressed hot refrigerant leaving the compressor. If this temperature rises dangerously high — because of low refrigerant, a blocked condenser, or compressor problems — the inverter reduces compressor speed or shuts down. Without this sensor, the compressor has no thermal protection.

Can F2 and F1 appear at the same time on a Tadiran?

F1 (low pressure) and F2 (discharge sensor) are separate faults. However, low refrigerant can cause both — low refrigerant drops suction pressure (F1) and causes the compressor to run hotter than normal, which could then trigger discharge temperature protection. A technician will identify the root cause from the full fault sequence.