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This OEM Carrier transformer (part # P201-35150) is the factory-specified replacement for the Carrier UPFLOW100UAHAC14C upflow air handler. The transformer steps down incoming line voltage — 120, 208, or 240 VAC — to a safe 12/24V AC output used to power thermostats, control boards, and all low-voltage circuit components. A failed transformer means zero control-circuit power: the system appears completely dead, the thermostat goes blank, and no heating or cooling function is possible.
Compatibility: Designed for the Carrier UPFLOW100UAHAC14C upflow air handler. Verify primary voltage matches your unit's supply voltage (120V, 208V, or 240V) and confirm the 50VA rating on your existing transformer's label before ordering. Our team is available to verify fitment prior to purchase — ships today when ordered before cutoff.