What are the specs for this Transformer?

The correct replacement for Tempstar model T9MPD080J16A4 — 40VA 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 T9MPD080J16A4 — 40VA 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 Control Transformer for T9MPD080J16A4 — 40VA 115V to 24V | Ships Today

Name: Tempstar Control Transformer for T9MPD080J16A4 — 40VA 115V to 24V | Ships Today
Brand: Tempstar
SKU: 1012722-GEN
Price: 28.95 USD
Availability: InStock

SKU: 1012722-GEN Brand: Tempstar

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Overview

This OEM control transformer (part #1012722) steps down 115V line voltage to the 24V control voltage required to operate your Tempstar T9MPD080J16A4 furnace's circuit board, relays, gas valve, and thermostat circuit. Rated at 40VA, it provides the power needed to energize all low-voltage controls. When a transformer fails, the entire furnace goes dead — no thermostat response, no ignition sequence, and often a blown low-voltage fuse on the control board. A failed transformer is one of the most common causes of a completely unresponsive furnace.

Specifications

Spec	Value
Part Number	1012722
Type	Control Transformer
Brand	Tempstar
Rating	40 VA
Primary Voltage	115V
Secondary Voltage	24V

Compatibility

Direct OEM fit for the Tempstar T9MPD080J16A4 gas furnace. This transformer is also shared across many ICP-family furnaces (Heil, Comfortmaker, Tempstar) using the same 40VA control platform. Verify your existing part number reads 1012722 before ordering.

Installation Guide

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

Signs You Need a Replacement

Furnace completely unresponsive — no thermostat or control board activity
Repeatedly blown low-voltage fuse on the control board
No measurable 24V at the secondary terminals
Visible burn marks, swelling, or a burnt smell from the transformer

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 Control Transformer for...

$28.95

Frequently Asked Questions

Does this Transformer fit my Tempstar T9MPD080J16A4 — 40VA 115V to 24V | Ships Today?

Yes. This is the factory-specified OEM transformer for the Tempstar T9MPD080J16A4 — 40VA 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 T9MPD080J16A4 — 40VA 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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