OEM Carrier 40VA Control Transformer for Model C48A302562

This OEM control transformer is the factory-specified replacement for the Carrier C48A302562 packaged unit. The transformer steps down line voltage (120V) to the 24V signal voltage required by your thermostat, control board, and all low-voltage control circuits. When it fails, the entire control circuit goes dead — the thermostat loses power, the system stops responding to calls for heating or cooling, and nothing works. If you're seeing a completely unresponsive system and your line voltage checks out, this transformer is almost always the culprit.

• Specs: 40VA rated | 120V primary / 24V secondary | Class 2 transformer | OEM part numbers HT01BD236 and HT01BD702 — factory-matched replacement
• OEM vs Generic: OEM transformers are wound to exact factory VA ratings and insulation class. Undersized or off-tolerance generic units can overheat under normal control circuit loads, tripping thermal protection and causing intermittent failures that are difficult to diagnose.
• Install difficulty: 2/5 — Disconnect power at the breaker and verify zero voltage before touching any wiring. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label or photograph all low-voltage wiring connections before removal. The transformer typically mounts to the control panel bracket with two screws.
• Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Engineered for Carrier model C48A302562 packaged units. Cross-references OEM part numbers HT01BD236 and HT01BD702. Always verify your existing transformer's VA rating and primary/secondary voltages on the unit's data plate or wiring diagram before ordering. Our parts team is available to confirm fitment before you buy — ships today!