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OEM Carrier 40VA Transformer HT01BD236 for PH1SPA090000AAAA
Carrier

OEM Carrier 40VA Transformer HT01BD236 for PH1SPA090000AAAA

SKU: CARRIE-PH1SPA090000AAAA-TRANSFORMER-HT01BD236 Brand: Carrier
✓ Guaranteed to fit PH1SPA090000AAAA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 40VA Control Transformer HT01BD236 for Model PH1SPA090000AAAA

This OEM control transformer (part number HT01BD236) is the factory-specified replacement for the Carrier PH1SPA090000AAAA packaged heat pump unit. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, contactor coils, and control board. When this part fails, the entire control circuit goes dark — thermostats become unresponsive, contactors won't pull in, and the unit will not heat or cool regardless of demand.

  • Specs: 40VA rated | 120V primary / 24V secondary | Direct OEM replacement | Factory-matched terminals for plug-and-play installation
  • OEM vs Generic: OEM transformers from Carrier are wound to exact VA and voltage tolerances, protecting downstream control boards and contactors. Generic units with loose VA ratings can cause nuisance tripping or undervoltage faults that shorten board life.
  • Install Difficulty: 2/5 — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output post-install), wire stripper. Note wire colors and terminal positions before disconnecting the old unit.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PH1SPA090000AAAA packaged heat pump unit. Always verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions.

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 PH1SPA090000AAAA?
Yes. This is the factory-specified OEM transformer for the Carrier PH1SPA090000AAAA. 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 PH1SPA090000AAAA?
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.
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Mike Rivera
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