Tadiran AC Error Code F1 — Low Pressure Protection Fix

What it means

F1 on a Tadiran AC means the refrigerant pressure in the system has dropped below the safe minimum and the low-pressure protection has shut off the compressor.
The most common cause is refrigerant slowly leaking out of the system over months or years.
This is not a DIY repair — it requires a licensed technician to find the leak and recharge the system.

Affected Models

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

Common Causes

Refrigerant leak — a pinhole or joint crack allowing refrigerant to escape slowly over time
Refrigerant undercharged at installation — never had enough from day one
Evaporator coil frozen — ice blocking refrigerant flow and dropping suction pressure
Expansion valve stuck open — refrigerant flooding through too fast, dropping suction pressure
Low pressure switch itself faulty — triggering F1 at normal pressure

How to Fix It

Check the indoor unit for ice buildup.

Look at the indoor unit and the copper pipes coming out of it.
Ice on the pipes or coil can cause a false F1 by restricting refrigerant flow.
If ice is present, switch to fan-only mode for 1–2 hours to defrost.
Check and clean the air filters.

Severely blocked filters restrict airflow, causing the evaporator coil to over-cool and ice up, which drops suction pressure.
Clean the filters, defrost any ice, and try again.
If no ice is present and F1 persists, switch off and call a technician.

Do not keep restarting — running the compressor with low refrigerant causes overheating and can permanently damage the compressor.
A technician will use an electronic leak detector to locate any leaks before recharging.

When to Call a Professional

F1 almost always requires a certified HVAC technician.
Adding refrigerant without fixing the leak is a temporary measure — the leak will continue.
Refrigerant handling requires certification and specialist equipment.

Frequently Asked Questions

How do I know if my Tadiran AC has a refrigerant leak?

Signs include: the AC runs continuously but never cools to the set temperature, ice forming on the indoor copper pipes, a hissing sound from the indoor unit, and the F1 error code appearing.
Only a technician with pressure gauges can confirm the actual refrigerant charge level.

How long does a refrigerant recharge last if the leak is not fixed?

If the leak is small, a recharge without a repair may last 1–3 years before F1 returns.
If the leak is larger, it may only last a few months.
A proper repair (finding and sealing the leak) followed by a recharge is always the correct solution.