OEM Carrier 40VA Furnace Control Transformer for PY3GNA060130NA

The control transformer is the power supply for your Carrier furnace's entire low-voltage control circuit. It steps line voltage (120/240V) down to the 24V that runs your thermostat, gas valve, control board relays, and safety switches. When this transformer fails the symptoms are unmistakable: a completely dead thermostat with a blank screen, a furnace that will not respond to any call for heat, and relays that never click in. A shorted secondary winding can also blow the board fuse repeatedly, or you may hear a faint 60-cycle hum from the transformer itself just before it quits. This is a 40VA Class 2 transformer with a dual 120/240V primary and a 24V secondary — the standard rating for Carrier 90-plus gas furnaces in this size class. The 40VA capacity gives enough headroom to energize the gas valve solenoid and multiple board relays at once without voltage droop, and the OEM unit carries an internal thermal-overload fuse that protects the windings from a downstream short. Why OEM matters here: generic transformers are frequently built with thinner-gauge windings or quietly rated below 40VA, so they sag under load and cause intermittent no-heat faults that are maddening to chase. An undersized replacement may power the board fine until the gas valve pulls in, then drop out. The OEM part matches Carrier's exact VA, mounting footprint, and lead configuration. Installation difficulty: 2 of 5. Tools: 1/4" and 5/16" nut driver, multimeter, wire nuts. SAFETY: kill the furnace breaker at the panel before touching any wiring — the primary leads carry live line voltage that can be lethal. Confirm 0V at the primary before disconnecting. 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 PY3GNA060130NA. 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.