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The Carrier HT01BD209 is the factory OEM control transformer for the Carrier PY2PPB060130AB packaged unit. This transformer steps down high-voltage line power (208/240V) to the 24V low-voltage signal required to operate the system's entire control circuit — including the thermostat, contactor coil, gas valve, and control board. When this transformer fails, the low-voltage circuit goes completely dead: the thermostat loses power, the system stops responding to any command, and you may detect a faint burning smell or audible buzzing near the transformer housing. Replacing it promptly prevents collateral damage to downstream controls.
Compatibility: Engineered as the direct OEM replacement for the Carrier PY2PPB060130AB packaged unit. Always verify the 208/240V primary voltage and 40VA rating on your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — reach out before placing your order.