What are the specs for this Transformer?

The correct replacement for Tempstar model T9MPD080J16A2 — 115V to 24V | 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 T9MPD080J16A2 — 115V to 24V | 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 T9MPD080J16A2 — 115V to 24V | Ships Today

Name: Tempstar 40VA Transformer for T9MPD080J16A2 — 115V to 24V | Ships Today
Brand: Tempstar
SKU: 1012722-GEN
Price: 26.95 USD
Availability: InStock

SKU: 1012722-GEN Brand: Tempstar

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Overview

This OEM control transformer (part number 1012722) supplies the low-voltage power for the Tempstar T9MPD080J16A2 gas furnace. It steps 115V line voltage down to 24V at 40VA, energizing the control board, thermostat circuit, gas valve, and relays. A failed transformer is one of the most common causes of a completely dead furnace — no display, no blower, and an unresponsive thermostat. Failures are usually caused by a shorted control wire, a stuck contactor or relay drawing excess current, or simple age-related winding breakdown.

Specifications

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

Compatibility

Direct OEM replacement for the Tempstar T9MPD080J16A2 furnace and other ICP-family (Tempstar, Heil, Comfortmaker, Arcoaire) units using a 40VA 115-to-24V control transformer. Verify the part number and terminal layout against your existing transformer before installing.

Installation Guide

Safety First — Disconnect power at the switch and breaker; verify zero voltage with a multimeter.
Access — Remove the furnace front service panel.
Document — Photograph every primary and secondary wire connection before disconnecting.
Remove — Label and disconnect the wires, then remove the transformer mounting screws.
Install — Mount the new transformer, reconnect each wire to the matching terminal per your photo.
Test — Restore power and confirm 24V on the secondary; run a full heat cycle.

Signs You Need a Replacement

Furnace is completely dead — no control board lights and no thermostat response.
No 24V measured across the transformer secondary terminals.
Blown low-voltage fuse on the control board that keeps failing.
Burnt smell or visible scorching on the transformer body.

Shipping & Returns

Ships same day on orders placed 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 T9...

$26.95

Frequently Asked Questions

Does this Transformer fit my Tempstar T9MPD080J16A2 — 115V to 24V | Ships Today?

Yes. This is the factory-specified OEM transformer for the Tempstar T9MPD080J16A2 — 115V to 24V | 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 T9MPD080J16A2 — 115V to 24V | 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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