Pressure Drops Below Manufacturer Thresholds Disable Most HVAC Cooling and Heating Cycles
https://precisionhvacrepaircenter.timeforchangecounselling.com/missing-that-critical-startup-window-costs-homeowners-thousands-in-damage-1
The number one problem with HVAC systems is refrigerant pressure falling below manufacturer diagnostic benchmarks, which prevents cooling or heating cycles from completing