This guide in 1-2-3
- Diagnose: Check the setting, the vents and the door seal; listen to how the compressor behaves.
- Compare: Relays and defrost faults cost far less than compressor or sealed-system work.
- Hire: Ask what was tested before a compressor is condemned, and what a refrigerant quote includes.
Safety first: Only technicians certified to handle refrigerants may work on the sealed system (in the US, EPA Section 608 certification). Never cut, puncture or “top up” refrigerant lines yourself.
What’s Wrong? Symptoms and Usual Causes
Most cooling complaints come down to one of these:
| Symptom | Common causes | Who should handle it |
|---|---|---|
| Warm, with a click every few minutes | Start relay or overload protector, or a compressor that can’t start | Technician |
| Freezer cold, fridge side warm | Defrost system (heater, sensor, timer), evaporator fan, blocked air vent | Check vents; repairs by a technician |
| Everything warm, running non-stop | Dusty condenser coils, condenser fan, refrigerant leak | Technician |
| Water on the floor or under the drawers | Blocked defrost drain, water line or filter leak | Technician (check seals yourself) |
| Thick ice in the freezer | Door seal not closing, defrost fault | Check the seal; repairs by a technician |
| New rattling or buzzing | Something touching a fan blade, worn fan motor, compressor problem | Technician |
Safe Checks You Can Do First
These are safe for most households and rule out the simple causes:
- Confirm the temperature setting
Make sure nobody has turned the dial. Aim for about 37–40°F (3–4°C) in the fridge and 0°F (−18°C) in the freezer.
- Unblock the vents
Food pushed against the inside air vents can stop cold air reaching the fridge section.
- Test the door seals
Shut the door on a sheet of paper. If it pulls out with no resistance, the seal may not be closing.
- Listen and take notes
Is the compressor humming, clicking on and off, or silent? Are the fans running? Pass this on to the technician.
When to stop: Unplug the fridge before cleaning anything near the back. Don’t open the sealed system or change electrical parts — that’s technician work.
Start Relay or Compressor?
A compressor replacement is one of the costliest fridge repairs, so make sure the cheaper look-alike faults have been ruled out.
Usually inexpensive
Start relay / overload
These small parts help the compressor start. When one fails, you may hear a click every few minutes as the compressor tries and gives up — and the fridge warms up. They can be tested and swapped in one visit.
Needs proof
Failed compressor
A compressor fault should be confirmed with electrical tests — such as winding resistance and current draw — after the relay, overload and fans are ruled out. Ask what was tested and what the readings were.
What a Lasting Refrigerant Repair Looks Like
Refrigerant circulates in a sealed loop and isn’t consumed. If it’s low, there’s a leak. A repair that lasts normally includes:
- Locating the leak
Using pressure testing with nitrogen, an electronic detector or bubble solution — before any refrigerant goes in.
- Fixing the leak
Brazing the joint or replacing the leaking part. Recharging without a repair just lets the refrigerant escape again.
- New drier and a vacuum
A fresh filter-drier is usually fitted and the system pulled into a deep vacuum to remove air and moisture.
- Charging by weight
The exact amount and type of refrigerant on the appliance’s rating plate, weighed in.
What to Ask on the Phone
These questions separate careful technicians from parts-swappers:
Q1: “Will you test the start relay, overload and fans before quoting a compressor?”
A careful technician will explain exactly how they confirm a compressor fault.
Q2: “Does the refrigerant price include finding and fixing the leak?”
Ask what’s included — leak detection, repair, drier and recharge — so you can compare quotes fairly.
Q3: “Are your technicians certified to handle refrigerant?”
In the US, anyone working on refrigerant systems needs EPA Section 608 certification.
Q4: “What warranty covers this, and will it be on the invoice?”
Ask separately about parts, labour and any sealed-system work.
Fix It or Replace It?
Sealed-system work is expensive, so pause before you approve it:
Look up the compressor warranty
Many makers cover the sealed system or compressor for longer than other parts — check your paperwork.
Price a new fridge
If the repair is a large share of a comparable new model, especially for an older unit, replacing may be better value.
Think about running costs
Newer models are often more efficient. Compare the yearly energy figures.
Keep food safe meanwhile
Keep the doors shut, move essentials to a cool box with ice, and throw out perishables that have been above 40°F (4°C) for over two hours.
Before the Technician Leaves
Cooling check
Before final payment- Confirm the compressor and fans are running and the freezer is starting to get cold. Full temperature can take hours — ask what to expect.
- Listen for a steady run, not repeated clicking on and off.
- Check the area: no refrigerant smell, no oil marks and all panels refitted.
- Take the itemised invoice listing parts, refrigerant type and amount (if any was added), labour and warranty.
Where to go next
General information, not a diagnosis of your device. 123 Drivers Guide doesn’t carry out repairs or recommend particular businesses. Follow the manufacturer’s instructions, and leave electrical, gas and refrigerant work to a qualified technician.