OEM Carrier 40VA 24-Volt Control Transformer for PY3GNA060090AB

The control transformer steps your home's 120 or 240-volt line power down to the 24VAC that runs the low-voltage control circuit in your Carrier PY3GNA060090AB package unit. Every command in the system depends on it — the thermostat, control board logic, gas valve, contactor coil, and relays all draw their power from this transformer. When it fails, the entire unit goes dead: a blank thermostat, no response on a call for heat or cool, and no clicking from the contactor or gas valve. A transformer that is shorting or overheating may trip the unit intermittently or give off a faint burning-electronics smell before it quits entirely. This OEM transformer is rated at 40VA with a 24VAC secondary, matched to the load demand of the PY3GNA control circuit and the contactor and valve coils it must hold in. The primary is wound for the line voltage of this package unit, and it includes the correct factory terminal configuration for a direct, no-adapter swap. Why OEM matters: an undersized or wrongly rated aftermarket transformer can't supply enough holding current for the contactor and gas valve at the same time, causing chatter, dropouts, and premature failure. The OEM 40VA rating provides the headroom Carrier designed in, so the control circuit stays stable under full load. Installation difficulty: 2 of 5. Tools needed: 1/4" nut driver, multimeter to confirm 24VAC output, and a phone to photograph the wire colors first. #1 safety warning: kill the breaker to the unit before disconnecting the transformer — the primary side carries full 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 PY3GNA060090AB. 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.