That clicking with no cooling is almost always a failed start relay. The fridge tries to fire the compressor, the relay can’t do its job, the compressor shuts back down, and the whole thing repeats every few minutes. Usually it’s a cheap part. But getting the diagnosis right before you spend a dime is the part that matters, because the wrong assumption here gets expensive fast.
Why it’s clicking
The compressor needs a quick shot of current to get spinning. The start relay delivers that shot. When the relay fails, it clicks or rattles, the compressor never turns over, and the fridge sits there warming up while making that sound on a loop.
There’s also a thermal overload protector nearby, a separate safety that cuts power if the compressor overheats. A bad overload throws the same clicking pattern. It’s less common than a failed relay, but it’s always on the list.
Here’s the reassuring part. Compressor failure is possible, but the clicking is actually a reason for some optimism. A completely dead compressor usually makes no clicking at all. If it’s clicking, the electrical side is still trying, which puts the money on the relay or the overload, not the expensive part.
The order a tech works in
First is the start relay. It’s a small plastic piece that plugs onto the side of the compressor. A bad one often rattles when you shake it, but we meter it to confirm, because a quiet relay isn’t automatically a good one.
If the relay’s fine, next is the overload protector, same area on the compressor. A tech checks it for continuity and confirms the resistance is in spec.
After that comes the compressor itself. We meter the windings across the common, start, and run terminals. Readings way off spec, a shorted winding, or a compressor shorted to its case point at compressor failure. Some models also have a start capacitor, and a weak one can stop the compressor from starting even when the relay and overload are both good.
Refrigerant level isn’t usually behind clicking with no start, but a badly undercharged system can trip pressure switches and cause odd behavior. That takes gauges and a licensed tech to sort out.
Why it goes to a pro past the basics
Compressor diagnostics need the right tools and the experience to read them. Replace parts in the wrong order, or misread a winding test, and it gets costly quick. The compressor is a sealed refrigeration component, so anything past testing the external relay is the kind of work that needs proper equipment and EPA certification.
If you want to try one thing before booking, unplug the fridge, wait a minute, and plug it back in. Clicks once and stops? The overload tripped from heat and may reset. Clicking pattern comes right back? It’s time for a real diagnosis.
Book a visit
Anywhere in the Bay Area, this is a call we run regularly. We’ll get you on the schedule fast, often same or next day. The $75 diagnostic is credited to the repair. Schedule a visit or call us directly.
One honest note. If the compressor turns out to be gone on a fridge over 10 to 12 years old, ask for a real cost comparison before you authorize the repair. Compressor replacement on an older unit often runs more than a new fridge. We’ll give you a straight answer on whether it’s worth fixing.