If your AC remote is working (confirmed by phone camera IR test) but the AC unit does not respond, the problem is with the AC's IR receiver sensor — not the remote.
Data Verified: 2026The IR receiver is a small dark-tinted window on the front panel of your indoor AC unit, usually located in the bottom-right corner. It can be blocked by dust, filters, or objects placed near the unit. Clean it gently with a dry microfibre cloth — never spray cleaners near the sensor.
Strong ambient light sources (direct sunlight hitting the sensor, bright halogen lights nearby) can also interfere with IR reception. If your AC sensor was recently in direct sunlight, try shading the front panel temporarily and testing the remote — if the AC responds, reposition the unit or block direct light from reaching the sensor.
If cleaning and light blocking do not fix the issue, the IR receiver component inside the AC may have failed. This is a hardware fault requiring a service technician. However, many modern smart ACs (LG ThinQ, Panasonic Wi-Fi, Voltas Smart) can be controlled via smartphone app even if the IR sensor fails.
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How do I know if the problem is the remote or the AC sensor?
Use your phone camera to check if the remote IR LED flashes when you press a button. If it flashes, the remote is fine and the issue is the AC sensor. No flash means the remote is faulty.
Can I replace the AC sensor myself?
The IR sensor is a small inexpensive component but requires basic electronics skill to replace. Most technicians charge ₹300–600 for this repair including the part.
Can I use a smartphone app if the AC sensor is broken?
If your AC has Wi-Fi (LG ThinQ, Panasonic, Voltas Smart), yes — control it fully via app. Otherwise, you can operate the AC from the manual panel buttons on the indoor unit itself.
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