Unit starts and stops every few minutes instead of running complete cooling cycles
Fix Steps:
1
Check thermostat differential setting - should be 1-2°F minimum
2
Verify filter pressure drop - replace if above 0.5 inches water column
3
Check refrigerant charge - improper charge causes short cycling
4
Inspect compressor contactors for pitting or damage
5
Verify high/low pressure switches are functioning correctly
6
Check for oversized equipment relative to load
7
Inspect economizer dampers operate smoothly and seal completely
8
Verify airflow is within manufacturer specifications (CFM per ton)
9
Check all safety controls reset properly
10
Review building automation system settings for conflicts