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8407-007 OBSOLETE
- TRANSFORMER 40VA 240V/24V
The Bard 8407-007 is an OEM 40VA control transformer used in Bard wall-mounted HVAC equipment to step down line voltage (typically 208 to 230V) to 24V for the low-voltage control circuit. A failing transformer can cause intermittent or complete loss of 24V power to the thermostat circuit, relays, contactors, and control boards, so replacing it with the correct Bard part helps restore stable operation and proper control voltage under load. Verify your unit model and the required primary voltage before ordering, and confirm your wiring matches the original transformer connections during installation.
Official replacement(s):
8407-034
- TRANSFORMER 208/240-24 40VA