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OEM Carrier Transformer 40VA 208/240V–24V for SUBCLR50HJ440083
Carrier

OEM Carrier Transformer 40VA 208/240V–24V for SUBCLR50HJ440083

SKU: CARRIE-SUBCLR50HJ440083-TRANSFORMER-HT01BD209 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Control Transformer 40VA 208/240V to 24V for Model SUBCLR50HJ440083

The Carrier HT01BD209 is the factory-specified OEM control transformer for the SUBCLR50HJ440083 HVAC unit. Its sole job is to step down line voltage from 208/240V to the 24V signal that powers every low-voltage component in your system — the thermostat, control board, relay coils, and safety circuits. When this transformer fails, nothing in the control circuit works: the thermostat goes blank, the system won't respond to any call for heating or cooling, and you may detect a faint burning smell or buzz from the transformer housing. It is one of the first components to check when an HVAC system is completely unresponsive.

  • Specs: 208/240V primary | 24V secondary | 40VA rated | 50/60 Hz | OEM part number HT01BD209 | Replaces HT01BD207, HT01CN232, and 9076-00
  • OEM vs Generic: This genuine Carrier OEM transformer is wound to exact factory VA and voltage tolerances, protecting sensitive control boards from voltage spikes. Aftermarket transformers with loose tolerances can under-deliver current under load, causing intermittent lockouts or premature board failure.
  • Install Difficulty: 2/5 — Shut off all power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, wire nuts or quick-connect terminals, a multimeter to verify 24V output after installation. Always label wires and photograph connections before removal.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse.

Compatibility: Designed for Carrier model SUBCLR50HJ440083. Also cross-references Carrier part numbers HT01BD207, HT01CN232, and 9076-00 — verify your data plate voltage ratings match 208/240V primary and 24V secondary before ordering. Need fitment help? Our HVAC parts specialists confirm compatibility before your order ships.

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 SUBCLR50HJ440083?
Yes. This is the factory-specified OEM transformer for the Carrier SUBCLR50HJ440083. 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 SUBCLR50HJ440083?
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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