Freezer Not Freezing? 5 Things to Check Before Calling a Repair Tech

Quick answer: A freezer that’s running but not getting properly cold is usually a door seal, ice build-up, or thermostat issue — all things worth checking yourself first. A freezer that’s silent and warm right through, or one that’s heavily frosted at the back panel, is more likely a sealed system or compressor fault that needs a technician.

1. Check the door seal isn’t letting warm air in

A worn, torn or dirty door seal (gasket) is one of the most common reasons a freezer struggles to hold temperature — warm air constantly leaking in forces the compressor to run harder while the freezer still won’t get properly cold. Run your hand around the edge of the door while it’s closed to feel for drafts, or try the “dollar bill test”: close the door on a strip of paper and see if it pulls out easily. Wipe the seal clean of food residue and ice first, since a dirty seal often just needs a clean rather than a replacement.

2. Clear ice build-up from the evaporator and vents

Excess ice can build up around the internal vents or the evaporator coil (usually hidden behind the back panel of the freezer compartment), blocking cold air from circulating properly. If you notice thick ice at the back or top of the compartment, a full defrost — unplug it, leave the door open, and let the ice melt completely — often restores normal freezing before you consider it faulty.

3. Check the temperature setting hasn’t been bumped

It sounds obvious, but a dial accidentally knocked while loading groceries, or a digital setting changed by a curious kid, is a genuine and common cause. Most freezers should be set to around -18°C. Give it 24 hours after adjusting the setting before judging whether it’s actually fixed the problem, since freezers take time to stabilise.

4. Don’t overpack it or block the internal vents

Freezers need air to circulate around the contents to stay cold evenly. Packing it edge-to-edge, or stacking items directly against the back panel where the vents usually sit, can stop cold air reaching the rest of the compartment even though the unit itself is working fine. Leave a little breathing room around the vents, especially at the back.

5. Check the condenser coils and clearance behind the unit

If the freezer is pushed hard against a wall, or the condenser coils underneath or at the back are thick with dust and pet hair, the compressor can’t release heat properly and struggles to keep the compartment cold. Pull it out (unplugged), vacuum the coils, and leave a few centimetres of clearance behind and above the unit when you push it back.

When it’s a job for a technician

Cleaned the seal, defrosted the ice, checked the setting and cleared the coils and it’s still not freezing properly — or the compressor has gone completely silent — that points to a sealed system fault, a failing compressor, or a refrigerant leak, none of which are DIY fixes. Our fridge and freezer repair technicians in Hobart, Indiana diagnose the exact fault on the visit and give you a flat, upfront price before any work starts.

A freezer that’s completely silent and warm right through is a different problem to one that’s running constantly but still not cold enough — the first usually means a compressor or power fault, the second usually means airflow or a seal.

Frequently Asked Questions

Why is my freezer running constantly but not getting cold?

This is the classic sign of a door seal leak, blocked vents, or dirty condenser coils — the compressor is working overtime to compensate but can’t win because cold air keeps escaping or can’t circulate. Work through the checks above before assuming it’s a bigger fault.

How long should I wait after defrosting before deciding it’s not fixed?

Give it a full 24 hours after a defrost or a temperature adjustment. Freezers take time to pull back down to temperature, especially if they’ve been holding warm for a while.

Is it worth repairing an older freezer, or better to replace it?

It usually comes down to the specific fault. A seal, vent blockage or thermostat is a low-cost, worthwhile fix on almost any freezer. A compressor or sealed system fault on an older unit is where it’s worth weighing the repair cost against a new one — see our repair or replace decision guide for a straightforward way to think about it.

Checked the seal, the ice and the coils and it’s still not freezing properly? Book a technician online — we repair fridges and freezers right across Hobart, Indiana with a flat, upfront quote and a 12-month parts and labour guarantee. You might also find our guide on what to check if your fridge isn’t cooling useful, since fridge-freezer combo units often share the same causes.

Want to avoid a repeat call-out? See a few simple habits that help prevent this.