Lloyd AC Error Code F1 — What It Means & How to Fix It

What Does This Error Mean?

F1 on a Lloyd AC means the indoor ambient temperature sensor (room thermistor) has a fault. This sensor reads room temperature so the AC knows when to increase or reduce cooling to maintain the set temperature. F1 triggers a safety shutdown — without reliable room temperature data, the AC cannot operate correctly.

Affected Models

Lloyd Inverter Split AC (all capacities)
Lloyd 3 Star Inverter
Lloyd 5 Star Inverter
Lloyd GLS series
Lloyd LS series Inverter

Common Causes

Indoor ambient thermistor failed — resistance outside the normal range
Thermistor connector loose at the indoor PCB
Thermistor wire damaged during installation or annual AC service
Dust accumulation on the thermistor probe
Indoor PCB fault causing incorrect reading of the ambient sensor

How to Fix It

Switch off at the remote and main switch. Wait 5 minutes and restart.

If F1 clears and does not return, it was a transient error. Monitor over the next few uses.
Clean the indoor unit air filter.

A blocked filter affects airflow over the ambient sensor and can contribute to abnormal readings.
Call Lloyd service (1800-315-1111) if F1 persists.

Note your model number and purchase date when calling — required for warranty claims.

When to Call a Professional

F1 requires a Lloyd (Havells) authorised technician. Lloyd customer care: 1800-315-1111. A technician will test the ambient thermistor and replace it if it reads outside specification.

Frequently Asked Questions

Lloyd is now part of Havells — does that affect warranty?

Lloyd ACs are now manufactured and serviced by Havells India. Warranty claims and service bookings go through Havells — call 1800-315-1111. Your existing Lloyd warranty remains valid and is honoured by Havells.