What are the specs for this Transformer?

The correct replacement for Tempstar model T9MPD080J16B1 — 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 T9MPD080J16B1 — 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 T9MPD080J16B1 — 115V to 24V | Ships Today

Name: Tempstar 40VA Transformer for T9MPD080J16B1 — 115V to 24V | Ships Today
Brand: Tempstar
SKU: 1012722-GEN
Price: 31.95 USD
Availability: InStock

SKU: 1012722-GEN Brand: Tempstar

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Overview

This OEM control transformer (part number 1012722) is the factory replacement for the Tempstar T9MPD080J16B1 gas furnace. It steps the 115V line voltage down to the 24V control voltage that powers the thermostat, control board, gas valve, and relays. Rated at 40VA, it provides the low-voltage current the furnace's control circuit needs to operate. When a transformer fails, the entire 24V control system goes dead — the thermostat screen may go blank, the furnace will not respond to a heat call, and no relays or valves will energize. Transformers most often fail from a control-circuit short that overloads the secondary winding, so it is good practice to find and clear the short before installing the replacement.

Specifications

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

Compatibility

Direct OEM fit for the Tempstar T9MPD080J16B1 80,000 BTU gas furnace. This 40VA 115V-to-24V transformer is shared across equivalent ICP-family Heil, Comfortmaker, and Tempstar furnaces. Confirm OEM part number 1012722 and your furnace's line voltage before ordering.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
Access — Remove the control compartment service panel.
Document — Photograph the primary (115V) and secondary (24V) wiring connections before disconnecting.
Remove — Disconnect the primary and secondary leads, then remove the transformer mounting screws.
Install — Mount the new transformer, reconnect the 115V primary and 24V secondary leads exactly per your photos.
Test — Restore power and verify 24V at the secondary terminals, then run a heat cycle to confirm the controls energize.

Signs You Need a Replacement

Thermostat display is blank or unresponsive
Furnace does not respond to any heat or fan call
No measurable 24V output at the transformer secondary
Transformer is hot to the touch, buzzing, or has a burnt smell

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 T9...

$31.95

Frequently Asked Questions

Does this Transformer fit my Tempstar T9MPD080J16B1 — 115V to 24V | Ships Today?

Yes. This is the factory-specified OEM transformer for the Tempstar T9MPD080J16B1 — 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 T9MPD080J16B1 — 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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