Fault Code Lookup

HVAC Sales Master

ERR105.00

Heater interlock relay fault / blower interlock relay stuck open

This code typically points to

Blower interlock relay failure

Next checks to confirm

Test blower interlock relay

Escalation

Critical

Reset behavior

Not separately stated.

Safety Critical

Immediate concern

Source

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

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