Why Is My Refrigerator Running All the Time?
Refrigerators cycle throughout the day, so frequent operation isn't automatically a problem. The concern is a noticeable change combined with poor cooling or other symptoms.
By Everyday Home Advice Editorial Team

Refrigerators cycle throughout the day, so frequent operation isn't automatically a problem. The concern is a noticeable change combined with poor cooling or other symptoms.
Is the refrigerator maintaining temperature?
A unit that runs frequently but maintains proper temperature is a different situation from one that runs constantly and still doesn't cool.
Check airflow
Follow manufacturer guidance for keeping appropriate ventilation areas clear.
Door use matters
Frequent door opening or a door that isn't sealing can increase runtime.
Check the door seal
Look for obvious damage, debris, and areas not contacting properly.
Room conditions
A refrigerator in a very warm environment may work harder.
When should I get help?
Consider appliance service when constant running is accompanied by poor cooling, unusual noises, excessive frost, water leakage, or a sudden change in operation.