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 PH3GPAA36000AA
Carrier

OEM Carrier Transformer 75VA 208/240/480V→24V for PH3GPAA36000AA

SKU: CARRIE-PH3GPAA36000AA-TRANSFORMER-HT01BD242 Brand: Carrier
✓ Guaranteed to fit PH3GPAA36000AA — or your money back. Terms

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 → 24VAC for Model PH3GPAA36000AA

This is the factory OEM replacement transformer (part number HT01BD242) for the Carrier PH3GPAA36000AA packaged heat pump unit. The transformer steps down line-voltage power (208/240/480V primary) to the 24VAC signal that energizes the entire low-voltage control circuit — thermostats, contactors, reversing valves, and the control board all depend on it. When the transformer fails, the system goes completely silent: no thermostat response, no contactor pull-in, and no error codes — because the control circuit has lost its power source entirely. A failed transformer is often misdiagnosed as a board failure; always confirm 24VAC output at the secondary before condemning other components.

  • Specs: 75VA rating | Primary: 208/240/480VAC, 50/60Hz | Secondary: 24VAC | Foot-mount configuration | Factory-matched to Carrier PH3GPAA36000AA control circuit load requirements
  • OEM vs Generic: OEM transformers are wound and potted to Carrier's exact VA and impedance tolerances. Undersized or off-spec generic units can overheat under full control-circuit load, tripping internal thermal cutouts and causing intermittent failures that are notoriously difficult to diagnose.
  • Install difficulty: 3/5 — Line-voltage wiring is present inside the unit; always disconnect power at the disconnect box and verify with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, wire nuts or spade connectors. Photograph or label all wiring before disconnecting the old transformer.
  • Warranty: 1-year OEM manufacturer warranty. In-stock orders ship same business day from our warehouse.

Compatibility: Engineered as the direct OEM replacement for the Carrier PH3GPAA36000AA packaged heat pump unit. Verify your unit's primary voltage (208/240V or 480V) on the data plate before ordering — both voltages are supported by this multi-tap transformer. Our fitment team is available to confirm compatibility before you buy. Order now and get same-day shipping on all in-stock parts.

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 $99
  • 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 PH3GPAA36000AA?
Yes. This is the factory-specified OEM transformer for the Carrier PH3GPAA36000AA. 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 PH3GPAA36000AA?
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