Model reference
Aprilaire 1720
HVAC
2 documents1 error code3 service modes
Available documentation
Tech Tip
- Instruction Sheet2 pg
Installation Guide
- Safety and Installation Instructions16 pg
MyPros+ Max
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- Step-by-step diagnostics from the service manual
- Test values, resistance specs, and wiring references
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Error codes (1)
CodeMeaning
EOThermistor not keeping proper temperature.Service modes (3)
- diagnostic1
- holiday_modePress the Holiday Mode key
- sales_demonstrationPress and hold the Max Cool and Power On/Off keys for 2 seconds.
Full entry steps, exit procedures, and test sequences are available in Max.
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