Model reference
American Standard PTHD-120
Air Conditioner
1 document9 error codes1 service mode
Available documentation
Service Manual
- Operation Maintenance Packaged Terminal Air Conditioner48 pg
MyPros+ Max
Diagnose your American Standard PTHD-120.
- Step-by-step diagnostics from the service manual
- Test values, resistance specs, and wiring references
- Verified part numbers when replacement is needed
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Error codes (9)
CodeMeaning
1Normal operation (LED continuously ON).2No power to the board or the control board has failed.3Compressor failure detected.4Blown fuse detected.5Mode switch or setpoint switch fault, or incorrect thermostat wiring.6Indoor air thermistor fault.7Indoor coil thermistor fault.8Outdoor air thermistor fault (PTHP models only).9Outdoor coil thermistor fault (PTHP models only).Service modes (1)
- Control Board Self-Diagnostic["Remove the cabinet front by grasping it, pulling the bottom away from the chassis until retaining…
Full entry steps, exit procedures, and test sequences are available in Max.
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