What are the specs for this Transformer?

The correct replacement for Tempstar model TDE050B12G1 — 115V to 24V 40VA | Ships Today 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 Tempstar equipment which lists the model number TDE050B12G1 — 115V to 24V 40VA | Ships Today.

Is this transformer compatible with Bryant or Payne systems too?

Many Tempstar 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.

Tempstar

Tempstar Transformer for TDE050B12G1 — 115V to 24V 40VA | Ships Today

Name: Tempstar Transformer for TDE050B12G1 — 115V to 24V 40VA | Ships Today
Brand: Tempstar
SKU: 1012722-GEN
Price: 28.95 USD
Availability: InStock

SKU: 1012722-GEN Brand: Tempstar

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Overview

This is a genuine OEM control transformer (part number 1012722) for the Tempstar TDE050B12G1 gas furnace. It converts the incoming 115V line voltage down to the 24V low-voltage control power used by the thermostat, gas valve, ignition control, and relays. Rated at 40VA, it delivers the current needed to operate the furnace's complete control circuit. A failed control transformer leaves the furnace dead at the thermostat — no display, no heat call, and no 24V present at the control board. Buzzing, a repeatedly blown low-voltage fuse, or visible scorching on the windings are all telltale signs of a shorted or burned-out transformer.

Specifications

Spec	Value
Part Number	1012722
Type	Step-Down Control Transformer
Brand	Tempstar (ICP / Heil)
Primary Voltage	115V
Secondary Voltage	24V
Rating	40VA
Fitment	OEM Replacement

Compatibility

Engineered as a direct OEM replacement for the Tempstar TDE050B12G1 furnace and other ICP-family models (Tempstar, Heil, Comfortmaker, Arcoaire) that use the 1012722 transformer. Verify your primary voltage (115V) and VA rating (40VA) match before installing.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
Access — Remove the furnace control/blower compartment service panel.
Document — Photograph all primary and secondary wire connections before disconnecting.
Remove — Disconnect the 115V primary leads and 24V secondary leads, then unbolt the transformer from its bracket.
Install — Mount the new transformer and reconnect the primary and secondary leads exactly per your photo.
Test — Restore power, confirm 24V across the secondary, and verify the furnace responds to a thermostat call for heat.

Signs You Need a Replacement

No power at the thermostat and no 24V output at the control board.
Low-voltage fuse on the control board blows repeatedly.
Audible buzzing or humming from the transformer.
Visible scorching, melted insulation, or a burnt smell at the windings.

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.

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

Tempstar Transformer for TDE050B...

$28.95

Frequently Asked Questions

Does this Transformer fit my Tempstar TDE050B12G1 — 115V to 24V 40VA | Ships Today?

Yes. This is the factory-specified OEM transformer for the Tempstar TDE050B12G1 — 115V to 24V 40VA | Ships Today. 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 Tempstar TDE050B12G1 — 115V to 24V 40VA | Ships Today?

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 Tempstar 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 Tempstar 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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