Fault Code Lookup

HVAC Sales Master

ERR172.00

Display Assembly stuck key / KEY FAULT

This code typically points to

Faulty Display Assembly

Next checks to confirm

Check/replace display assembly

Escalation

User Display

Reset behavior

Clears when stuck-key/display fault corrected.

Service Soon

Schedule repair

Source

Trane Hyperion *AM8/TAM8 Field Reference Data, p.22

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