A heat pump system repeatedly freezes up every 3-5 days around midday despite normal charge and static pressure, and the technician cannot identify the root cause.
Standard diagnostic tools (pressure gauges, static pressure measurements) and component replacement do not reveal the intermittent freeze-up pattern; technician suspects ECM blower motor or thermostat issue but lacks a systematic way to diagnose intermittent failures involving both the equipment and the thermostat.
HVAC Diagnostic Companion
An app that guides HVAC technicians through complex intermittent failures by combining real-time equipment data, historical patterns, and smart thermostat logs. It correlates freeze events with operating conditions and suggests timed tests or data logging to pinpoint the root cause (e.g., ECM motor, thermostat, or refrigerant issue).
- Integrates with Nest and other smart thermostats to log freeze events and system status
- Guides technician to set up data logging (temps, pressures, blower speed) over 24-48 hours
- Analyzes logged data to identify patterns (time of day, temperature, runtime) and suggests likely causes
- Provides step-by-step diagnostic workflows with manufacturer-specific troubleshooting trees
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