OEM Carrier 40VA Control Transformer 24V for PH13PR04800GAJAA

The control transformer steps your Carrier PH13PR04800GAJAA's 230VAC line voltage down to the 24VAC that powers the thermostat, control board, contactor coil, and reversing-valve solenoid. It is the power supply for the entire low-voltage control circuit. When the transformer fails the whole control side goes dead: a blank thermostat, an outdoor unit that never energizes, no response to a call for heat or cool, and a unit that has line voltage but does nothing. A transformer killed by a shorted thermostat wire or a stuck contactor coil will often hum, run hot, smell burnt, or visibly bulge before it opens completely. This is a Class II control transformer with a 208/230VAC primary and a 24VAC secondary, commonly rated 40VA for this packaged platform, and many are internally fused or paired with a low-voltage circuit breaker. Confirm the primary voltage, secondary voltage, and VA rating against your old transformer before ordering, and find the short that took out the original — a new transformer will fail again in seconds if the underlying fault remains. Why OEM matters here: the genuine Carrier transformer supplies clean, correctly-rated 24VAC and is built with windings sized to handle the inrush of the contactor and reversing-valve coils. Undersized aftermarket transformers sag under load, chatter the contactor, and burn out early, leaving you with repeat no-power failures. Install difficulty: 2 of 5. Tools needed: a 1/4-inch and 5/16-inch nut driver, a Phillips screwdriver, and a multimeter to confirm 24VAC output and check for shorts. #1 safety warning: TURN OFF THE BREAKER before touching the transformer — the primary side carries full 230V line voltage. 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 PH13PR04800GAJAA. 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.