OEM Carrier 40VA Control Transformer for PG9MAA048060ADKA Furnace

The control transformer steps the incoming 115 VAC line voltage down to the 24 VAC that powers the low-voltage side of your Carrier PG9MAA048060ADKA — the thermostat, control board logic, gas valve solenoid, and relay coils. When the transformer fails, the entire low-voltage system goes dead: the thermostat screen is blank, the furnace doesn't respond to a heat call, and you get no inducer, no igniter, and no blower. An overloaded or shorted 24V circuit (often a pinched thermostat wire) can burn the transformer out, sometimes with a faint scorched smell. This OEM transformer is rated 120/24 VAC at 40 VA, matching the PG9MAA furnace's load budget with headroom for the gas valve and accessory relays. The 40 VA rating is important — it sizes the secondary current capacity so the board and gas valve get full, stable 24V under simultaneous load. Why OEM matters here: undersized aftermarket transformers (often 20–30 VA) sag under load, dropping secondary voltage when the gas valve and relays pull in together. That low 24V can chatter relays and cause intermittent ignition faults. The correct 40 VA OEM part holds voltage steady across the full cycle. Install difficulty: 2/5. Tools: 1/4" nut driver, wire strippers, and a multimeter to confirm 24 VAC on the secondary and to check for the short that may have killed the original. SAFETY: kill the furnace breaker before wiring — the primary terminals carry 115 VAC 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 PG9MAA048060ADKA. 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.