OEM Carrier Control Transformer 208/230V–24V 40VA for Model PF1MNB024008AAAA

This is the genuine OEM replacement control transformer (part #HT01CN241) factory-specified for the Carrier PF1MNB024008AAAA fan coil and air handler unit. The transformer steps down line voltage from 208/230V to a 24V secondary signal that powers the entire low-voltage control circuit — including the thermostat, contactor coil, relay boards, and any zone controls. When this transformer fails, the result is total loss of 24V control power: the thermostat goes dark, the system becomes completely unresponsive, and no heating or cooling call can be executed. A failed transformer will often show 0V on the secondary leads when tested with a multimeter, or may have a visibly burned or cracked housing.

• Specs: 208/230V Primary | 24V Secondary | 40VA Rating | OEM Part #HT01CN241 | Factory-matched to Carrier PF1MNB024008AAAA specifications
• OEM vs Generic: This genuine Carrier OEM transformer is wound to exact VA and voltage tolerances. Off-brand substitutes may deliver marginal 24V output under load, causing nuisance lockouts, erratic thermostat behavior, and premature contactor coil failure.
• Install Difficulty: 2/5 — Shut off all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, needle-nose pliers, wire labels or tape. Photograph all low-voltage wiring before disconnecting. Verify 0V at primary leads before handling. Typical replacement time: 20–40 minutes.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse when ordered by 3 PM local time.

Compatibility: Designed as the direct OEM replacement transformer for the Carrier PF1MNB024008AAAA air handler/fan coil unit. Verify your unit's data plate lists 208/230V primary and 24V/40VA secondary before ordering. This part also cross-references across Carrier, Bryant, and ICP family equipment sharing the HT01CN241 specification. Have a fitment question? Our HVAC parts specialists confirm compatibility before you order — contact us today and ship the same day.