E5
Tadiran Split AC
Severity: ModerateWhat Does This Error Mean?
E5 on a Tadiran AC means the outdoor ambient temperature thermistor has a fault. This sensor measures the outside air temperature so the inverter can optimise compressor speed for efficiency. When the sensor fails or reads an impossible value, the AC shuts down.
Affected Models
- Tadiran Inverter Split AC
- Tadiran Breeze Series
- Tadiran T-MAX Series
- Tadiran Coral Series
- Tadiran Split AC (all inverter models)
Common Causes
- Outdoor ambient thermistor has failed — resistance value outside specification
- Thermistor connector loose or corroded at the outdoor PCB
- Thermistor wiring damaged by weather or rodent activity
- Thermistor probe dislodged from its mounting position
- Outdoor PCB fault causing incorrect sensor reading
How to Fix It
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Turn off the AC and circuit breaker, wait 5 minutes, then attempt one restart.
If E5 clears after a power cycle, monitor the AC for the next hour. If it returns, the sensor has a genuine fault.
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If E5 persists, call a Tadiran technician.
The outdoor ambient thermistor is an inexpensive part — the main cost is the service visit.
When to Call a Professional
E5 requires a Tadiran authorised technician. The thermistor is inside the outdoor unit which contains high-voltage components. A technician will test the sensor resistance and replace it if necessary.
Frequently Asked Questions
Is E5 common on Tadiran ACs?
Thermistor faults are among the more common service calls for all AC brands, including Tadiran. Sensors degrade over time, especially in outdoor units exposed to heat and humidity. Most Tadiran models use standard thermistor values, making replacement straightforward for any authorised technician.
Can a false E5 be caused by electrical noise?
Yes — electrical interference from nearby appliances or grid noise can occasionally cause a momentary false thermistor reading. If E5 appears rarely and only briefly, check whether it correlates with large appliances switching on nearby. A technician can install a line filter to reduce interference if this is the cause.