What are the specs for this Transformer?

The correct replacement for Carrier model PY1PPB036090AAAA is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Carrier equipment which lists the model number PY1PPB036090AAAA.

Is this transformer compatible with Bryant or Payne systems too?

Many Carrier parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

Carrier

OEM Carrier Transformer 40VA 120V/24V for PY1PPB036090AAAA

Name: OEM Carrier Transformer 40VA 120V/24V for PY1PPB036090AAAA
Brand: Carrier
SKU: CARRIE-PY1PPB036090AAAA-TRANSFORMER-HT01BD209
Price: 47.25 USD
Availability: InStock

SKU: CARRIE-PY1PPB036090AAAA-TRANSFORMER-HT01BD209 Brand: Carrier

✓ Guaranteed to fit PY1PPB036090AAAA — or your money back. Terms

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OEM Carrier Control Transformer 40VA 120V/24V for Model PY1PPB036090AAAA

This OEM Carrier transformer (part HT01BD209) is the factory-specified replacement for the Carrier PY1PPB036090AAAA packaged unit. The control transformer steps down line voltage (120V) to the 24V AC signal used by your thermostat, control board, and low-voltage safety circuits. When it fails, the entire control circuit goes dark — you'll see a blank thermostat display, no response to any thermostat call, or tripped low-voltage fuses that keep blowing without explanation.

Specs: Primary: 120V AC | Secondary: 24V AC | 40VA capacity | Terminal or wire-lead connection | Factory-matched output tolerance for reliable low-voltage operation
OEM vs Generic: OEM transformers from Carrier deliver the precise VA rating and insulation class your unit was engineered for. Off-brand replacements often run undervoltage under load, causing nuisance lockouts, board resets, and premature contactor wear.
Install Difficulty: 2/5 — Always disconnect line-voltage power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to verify 24V output after install). Label or photograph all low-voltage wiring before removal.
Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3PM local time.

Compatibility: Engineered for Carrier model PY1PPB036090AAAA. Verify your existing transformer's VA rating and primary/secondary voltages on the unit's data plate or wiring diagram before ordering. Our fitment team is available to confirm compatibility before you buy — orders placed today ship same business day.

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

OEM Carrier Transformer 40VA 120...

$47.25

Frequently Asked Questions

Does this Transformer fit my Carrier PY1PPB036090AAAA?

Yes. This is the factory-specified OEM transformer for the Carrier PY1PPB036090AAAA. 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 PY1PPB036090AAAA?

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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OEM Carrier Transformer 40VA 120V/24V for PY1PPB036090AAAA

OEM Carrier Control Transformer 40VA 120V/24V for Model PY1PPB036090AAAA

Shipping Information

Return Policy

Frequently Asked Questions