Short answer: Ice forms when moist air meets a very cold surface. In single-door (direct-cool) fridges, some ice is normal and needs manual defrosting. Heavy or fast build-up in any fridge usually means warm, humid air is getting in through a worn door gasket or a door left ajar. In frost-free fridges, ice on the freezer's back panel means the automatic defrost system has failed.
Causes by Fridge Type
Single-door fridges:
- Normal ice that hasn't been defrosted in weeks
- Gasket gaps letting in humid air (worse in monsoon)
- Thermostat stuck on the coldest setting
- Door opened very often or left slightly open
Frost-free fridges:
- Defrost heater, sensor or timer failure
- Blocked defrost drain refreezing
- Damaged gasket
What to Do
- Defrost single-door fridges when ice reaches about 5 mm. Never chip it with a knife; you can puncture the gas line.
- Do the paper test on the door gasket.
- Set the thermostat to the middle.
- If a frost-free fridge is icing up, unplug it for 24 hours to melt the ice, then book a defrost-system check.
A gasket replacement or defrost repair usually costs ₹900 – ₹3,000 . Fridge repair charges
