Refrigerator Won’t Start? Here’s What to Check Before You Panic

You walk into the kitchen and something feels off. It’s too quiet. The refrigerator (that background hum you never think about) is completely silent. No compressor running, no fans spinning, no lights when you open the door. Or maybe the light comes on but nothing else happens. Either way, your food is warming up and the clock is ticking.

A refrigerator that won’t start feels like a big deal, and it is, but the cause is often simpler than you’d expect. We see this all the time, and nine times out of ten it comes down to one of a handful of parts that are straightforward to test with basic tools.

Full safety notes below

Most Common Causes at a Glance

Before pulling the fridge away from the wall, here’s what you’re most likely dealing with:

• Failed start relay: the small device that kicks the compressor on

• Faulty overload protector: shuts down the compressor circuit and won’t reset

• Defective main control board: not sending the signal to start

• Bad compressor: the compressor itself has an open or shorted winding

There are other possibilities, like a blown thermal fuse or a wiring issue, but these four account for the vast majority of no-start complaints across brands.

Tools You’ll Need

Keep it simple:

• Multimeter (capable of reading ohms and AC/DC voltage)

• 1/4-inch nut driver

• Phillips screwdriver

• Flathead screwdriver

• Work gloves

• Flashlight or headlamp

Unplug the refrigerator before doing any work. These components sit right next to the compressor’s electrical terminals, which carry line voltage when the unit is powered. Don’t skip this step.

Diagnosing the Problem Step by Step

Start Relay

The start relay is the single most common reason a refrigerator won’t start. It’s a small device (roughly the size of a deck of cards or smaller) that plugs directly onto the compressor’s terminal pins at the back of the unit, down near the floor. Its job is to momentarily boost current to the compressor’s start winding so the motor can kick over. Once the compressor is up to speed, the relay drops the start winding out of the circuit.

When the start relay fails, the compressor gets no start signal and just sits there silent. Sometimes you’ll hear a faint click every few minutes as the relay tries and fails, followed by another click as the overload protector trips. That click-click pattern repeating every few minutes is practically a signature of a bad start relay.

Here’s how to test it:

1. Pull the refrigerator away from the wall and unplug it.

2. Remove the lower rear access panel (usually held by a couple of 1/4-inch screws or Phillips screws).

3. Locate the start relay: it’s plugged onto the side of the compressor. The overload protector is typically right next to it or combined into the same housing.

4. Gently pull the relay off the compressor terminals.

5. Give it a shake. If you hear rattling inside, the relay is toast. That rattling is a broken internal contact, and you can stop testing right here.

6. If no rattle, set your multimeter to ohms and test continuity between the relay’s two terminal pins (the ones that connect to the compressor). You should see a low resistance reading, typically under 20 ohms. An open reading (OL) means the relay is bad.

Pro Tip: A start relay that smells burnt is done. Don’t second-guess it. Replace it.

When you’re ready to find the right part, grab your model number and head over to our repair help section to get the exact match.

Overload Protector

The overload protector is a thermal safety device wired in series with the compressor. If the compressor draws too much current or gets too hot, the overload opens the circuit to prevent damage. After it cools down, it should reset and allow the compressor to try again. That’s why a failing system sometimes clicks on and off every few minutes.

But overload protectors can fail permanently: stuck open. When that happens, the compressor has no path for current and the fridge stays dead quiet.

1. With the fridge unplugged, remove the overload from the compressor (it’s often snapped or plugged on near the start relay, sometimes in the same housing).

2. Set your multimeter to continuity or ohms.

3. Test across the overload’s two terminals. At room temperature, you should get a near-zero reading, indicating a closed circuit.

4. If you get an open reading (OL), the overload has failed and needs replacing.

One thing to keep in mind: if the overload keeps tripping on a new unit or after replacement, that’s a sign the compressor itself may be drawing excessive current. The overload is doing its job: the problem is upstream. Don’t just keep replacing overloads without checking the compressor.

Main Control Board

Modern refrigerators rely on an electronic main control board to orchestrate everything: compressor start, fan operation, defrost cycles, you name it. If this board fails, it may simply stop sending the start signal to the compressor relay circuit, and nothing happens.

Control board failures are trickier to confirm definitively because there’s no single continuity test that tells the whole story. But here’s a practical approach:

1. Check the board visually first. Remove the cover (usually in the back, near the bottom). Look for obvious burn marks, scorched components, cracked solder joints, or bulging capacitors. Any of those are a clear sign.

2. With your multimeter set to DC voltage and the fridge plugged in, carefully check whether the board is outputting voltage to the compressor circuit. You’re looking for line voltage at the board’s compressor output terminals during a call for cooling. Be extremely careful around live voltage. If you’re not comfortable with this, skip it and test the other components first.

3. If the start relay, overload, and compressor all test fine, the board becomes the prime suspect by process of elimination.

A common mistake we see is people jumping straight to the control board because it’s the most expensive part. Test the cheaper, more failure-prone components first. Start relay and overload testing takes five minutes and rules out the most likely culprits.

Compressor

Nobody wants to hear this one, but sometimes the compressor itself is the problem. Compressor motors have three windings: common, start, and run. If any winding is open or if there’s a short to ground, the compressor won’t start regardless of what else you do.

1. Unplug the fridge and pull the start relay and overload off the compressor terminals.

2. You’ll see three pins on the compressor: they form a triangle. These are the Common (C), Start (S), and Run (R) terminals.

3. Set your multimeter to ohms. Test between each pair: C to S, C to R, and S to R.

4. You should get a resistance reading on all three pairs. Typical readings vary by compressor, but you’ll generally see single-digit to low double-digit ohms between C-R and C-S, and the S-R reading should roughly equal C-R plus C-S.

5. If any pair reads open (OL), that winding is broken.

6. Now test each terminal to the compressor’s metal housing (ground). Set your meter to the highest ohm range. You should get OL on every terminal to ground. Any continuity at all means the winding is shorted to ground.

A compressor with an open winding or a ground short is done. Compressor replacement on a household refrigerator involves sealed system work (brazing refrigerant lines and recharging) which requires specialized equipment. If your compressor tests bad, head over to our forum and post your model number and test results. Our community can help you weigh your options and figure out the best path forward.

Quick Checklist Before You Test Anything

Before pulling out the multimeter, rule out the obvious:

• Is the outlet live? Plug in a lamp or phone charger. We’ve seen people troubleshoot for an hour only to find a tripped GFCI or a blown kitchen circuit breaker.

• Is the temperature control turned off? Some models have a physical dial that can get bumped to the “off” position. Check it. If you want to make sure your fridge is set correctly once it’s running again, here’s a quick guide on what temperature a refrigerator should be set to.

• Did the power cord get damaged? If the fridge was recently moved, check for a pinched or severed cord.

Need More Help?

If you’ve worked through these tests and you’re still stuck, don’t sweat it. Post your model number and test results on our repair forum. Our community of techs and experienced DIYers can help you zero in on the problem and get your fridge back up and running.

Written by: AppliancePartsPros Team