What are the specs for this Transformer?

The correct replacement for Tempstar model TDE100F16G1 — 115V to 24V Control | 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 TDE100F16G1 — 115V to 24V Control | 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 40VA Transformer for TDE100F16G1 — 115V to 24V Control | Ships Today

Name: Tempstar 40VA Transformer for TDE100F16G1 — 115V to 24V Control | Ships Today
Brand: Tempstar
SKU: 1012722-GEN
Price: 28.00 USD
Availability: InStock

SKU: 1012722-GEN Brand: Tempstar

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Overview

This is the genuine OEM 40VA control transformer (part number 1012722) for the Tempstar TDE100F16G1 furnace. It steps line voltage of 115V down to the 24V control voltage that powers the thermostat, gas valve, relays, and control board. Rated at 40VA, it supplies enough current for the furnace's low-voltage circuit plus a typical air conditioning contactor load. When a transformer fails — usually from a short, surge, or overload — the entire 24V control system goes dead: no thermostat display, no call for heat or cool, and an unresponsive furnace despite line power being present.

Specifications

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

Compatibility

Designed for the Tempstar TDE100F16G1 and shared across many ICP-family furnaces (Tempstar, Heil, Comfortmaker, Arcoaire) using a 115V-to-24V 40VA control transformer. Confirm primary voltage and mounting before ordering.

Installation Guide

Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
Access — Remove the service panel to reach the control area.
Document — Photograph all primary and secondary wire connections before disconnecting.
Remove — Label and disconnect the leads, then unfasten the transformer mounting screws.
Install — Mount the new transformer, reconnect primary (115V) and secondary (24V) leads per your photo.
Test — Restore power and verify 24V across the secondary terminals, then confirm normal furnace operation.

Signs You Need a Replacement

No 24V at the control board or thermostat
Blank thermostat with line power confirmed present
Burnt smell or visible scorching on the transformer
Repeated blown low-voltage fuse

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 40VA Transformer for TD...

$28.00

Frequently Asked Questions

Does this Transformer fit my Tempstar TDE100F16G1 — 115V to 24V Control | Ships Today?

Yes. This is the factory-specified OEM transformer for the Tempstar TDE100F16G1 — 115V to 24V Control | 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 TDE100F16G1 — 115V to 24V Control | 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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