OEM Carrier Furnace Transformer Replacement for UPFLOW150FAU14A

The control transformer steps your Carrier furnace's incoming line voltage (120V or 240V) down to the 24V low-voltage power that runs the thermostat, gas valve, control board, and relays. When it fails the entire low-voltage side goes dead: a blank thermostat, no response when you call for heat or cool, and a furnace that won't start at all even though the unit still has line power. A transformer overloaded by a shorted thermostat wire often fails with a faint burning-varnish smell, and an open winding or blown internal thermal fuse leaves you reading 0V on the secondary terminals. This is a genuine OEM Carrier transformer matched to the original VA rating and primary/secondary voltages your model requires — commonly a 40VA unit with a 120/208/240V primary and a 24V secondary. The VA rating is critical: it must supply enough current for the gas valve and any add-on accessories without overheating. The mounting foot, lead colors, and quick-connect terminals match the factory wiring so it lands in the existing harness without modification. Why OEM here: cheap aftermarket transformers are frequently wound to a lower VA than advertised and use thinner magnet wire that runs hot and sags under load, browning out the control board and causing intermittent no-heat faults. A correctly rated genuine transformer holds a stable 24V even when the gas valve and inducer energize together. Install difficulty: 2 of 5. Tools: 1/4" and 5/16" nut drivers, a multimeter to verify 24V output, and wire nuts or spade connectors. #1 safety warning: shut OFF the furnace at the breaker before opening the control box — the primary side carries full line voltage that can be lethal. Verify zero voltage with your meter before touching any leads. Ships same business day from our stocked warehouse on orders placed before 3 PM CST. Backed by a 1-year OEM warranty and 30-day hassle-free returns on uninstalled parts.

Compatibility

This part is compatible with Carrier model UPFLOW150FAU14A. Always verify the part number against your unit's data plate before ordering.

Why Choose OEM?

OEM parts are manufactured to the exact factory specifications for your unit. Generic aftermarket alternatives may fit physically but often use lower-rated components that reduce equipment life and void manufacturer warranties. When the cost difference between OEM and generic is $10-30, the OEM part is always the smarter investment on a system worth $5,000-$15,000.

Shipping & Returns

Same-day shipping on orders before 3 PM CST. Standard delivery 2-5 business days, express options available at checkout. 30-day hassle-free returns on uninstalled parts — free return shipping included. 1-year OEM factory warranty coverage.