OEM Carrier 40VA Control Transformer HT01CN001 for Model UPFLOW125UAHAC14B

This OEM replacement control transformer (part number HT01CN001) is the factory-specified unit for the Carrier UPFLOW125UAHAC14B upflow gas furnace. The transformer steps down 120V line voltage to 24V to power the low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When this transformer fails, the entire control circuit goes dead: the thermostat gets no power, nothing responds, and the furnace won't attempt a heat cycle at all.

• Specs: 40VA rating | 120V primary / 24V secondary | Designed to factory OEM tolerances | Direct plug-in or wire-in replacement for Carrier UPFLOW125UAHAC14B
• OEM vs Generic: This is a genuine OEM Carrier transformer, matched to the exact VA rating and terminal configuration of your unit. Generic transformers may be under-rated, causing nuisance trips on high-demand control circuits or premature failure under load.
• Install difficulty: 2/5 — Disconnect power at the breaker and verify zero voltage before touching any terminals. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Always photograph existing wiring before disconnecting leads.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Confirmed fit for Carrier model UPFLOW125UAHAC14B upflow gas furnace. Always verify your existing transformer's VA rating and primary/secondary voltages on the data plate before ordering. Our HVAC parts specialists are available to confirm fitment — just reach out before you buy.