4 flashes w/pause
Outdoor coil thermistor failure
This code typically points to
- Failed OCT thermistor
- Wiring fault
- Bad connection
Next checks to confirm
- Verify coil-sensor resistance and wiring
- Verify mounting/location
Escalation
If sensor checks good at board, suspect control input issue.
Reset behavior
No public reset timing documented in install/start-up manual.
Service Soon
Schedule repair