Same-day shipping before 3PM CST · 35,000+ OEM Parts · Texas CMBL & SAM.gov Registered · Government POs Accepted

Menu

Home Shop All Account Cart
OEM Carrier Transformer 75VA 208/240/480V–24V for PH4GEXB36000AA
Carrier

OEM Carrier Transformer 75VA 208/240/480V–24V for PH4GEXB36000AA

SKU: CARRIE-PH4GEXB36000AA-TRANSFORMER-HT01BD242 Brand: Carrier

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Control Transformer 75VA 208/240/480V to 24VAC for Model PH4GEXB36000AA

This is the OEM factory-specified control transformer for the Carrier PH4GEXB36000AA packaged heat pump unit. The transformer steps down high-voltage line power (208/240/480V primary) to the 24VAC signal voltage that powers your thermostat, contactor coil, and all control-circuit components. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system refuses to respond to any call for heating or cooling, and no relay or contactor will energize. Replacing it with the correct OEM unit is the fastest path back to a fully functioning system.

  • Specs: 75VA capacity | 208/240/480V primary input | 24VAC secondary output | 50/60 Hz | Foot-mount configuration | OEM Part #HT01BD242
  • OEM vs Generic: OEM Carrier transformers are wound and potted to exact factory VA ratings and insulation class. Undersized or off-tolerance aftermarket units can overheat under full control-circuit load, causing nuisance shutdowns or premature failure of downstream components.
  • Install difficulty: 2/5 — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24VAC output post-install). Always label and photograph all wiring connections before removal. Foot-mount design simplifies bracket alignment.
  • Warranty: 1-year OEM manufacturer warranty. In-stock units ship the same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PH4GEXB36000AA packaged heat pump units. Also cross-compatible with select Bryant, Payne, and ICP family units sharing the same 75VA, 208/240/480V–24V control transformer specification — verify your unit's data plate before ordering. Have a fitment question? Our HVAC parts specialists confirm compatibility before you buy.

Shipping Information

  • Orders placed before 3PM CST ship same business day
  • Standard delivery: 2-5 business days
  • Express shipping available at checkout
  • Free shipping on orders over $75
  • Tracking number emailed upon shipment

Return Policy

  • 30-day returns on unused parts in original packaging
  • Electrical parts (capacitors, contactors, control boards) are final sale once installed
  • Email info@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Transformer fit my Carrier PH4GEXB36000AA?
Yes. This is the factory-specified OEM transformer for the Carrier PH4GEXB36000AA. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.
How do I replace the transformer on my Carrier PH4GEXB36000AA?
Difficulty: Medium (30–45 min)
Step 1: Turn off breaker. Step 2: Photo wiring connections. Step 3: Disconnect wires from old transformer. Step 4: Remove mounting hardware. Step 5: Install new transformer, reconnect wires matching voltage ratings. Step 6: Verify 24V output with multimeter.
My thermostat has no power. What failed?
Thermostat with no display = failed 24V transformer (or blown control board fuse). Check the 3A/5A fuse on the control board first ($1–$5 fix). If fuse is good but no 24V output from transformer, replace transformer.
Is this transformer compatible with Bryant or Payne too?
Many Carrier parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.
Should I use OEM or aftermarket for my Carrier transformer?
OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.
How fast does National HVAC Parts ship?
Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.
Home Shop Search Account Cart
Fitment Guaranteed
MR
Mike Rivera
HVAC Parts Specialist — Online