What are the specs for this Transformer?

The correct replacement for Tempstar model T8MPT075F14A1 — 115V to 24V Control Transformer | 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 T8MPT075F14A1 — 115V to 24V Control Transformer | 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 T8MPT075F14A1 — 115V to 24V Control Transformer | Ships Today

Name: Tempstar 40VA Transformer for T8MPT075F14A1 — 115V to 24V Control Transformer | Ships Today
Brand: Tempstar
SKU: 1012722-GEN
Price: 27.95 USD
Availability: InStock

SKU: 1012722-GEN Brand: Tempstar

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

Overview

This OEM 40VA control transformer (part number 1012722) supplies the 24-volt control power for the Tempstar T8MPT075F14A1 gas furnace. It steps the 115V line down to a 24V secondary that runs the control board, gas valve, thermostat circuit, and inducer relay. Rated at 40VA, it has the headroom to carry the furnace's control loads plus a typical thermostat and accessory. When a transformer fails — usually from a shorted low-voltage wire or an overloaded control circuit — the furnace goes completely dead at the thermostat: no display, no call for heat, and no response from the control board even though 115V line power is present. A blown transformer is a frequent root cause behind an unresponsive furnace.

Specifications

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

Compatibility

Built for the Tempstar T8MPT075F14A1 furnace and the shared ICP / Heil / Comfortmaker control platform that uses a 40VA, 115V-to-24V transformer. Confirm the primary and secondary voltages against your existing transformer before installing.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker and verify zero voltage with a multimeter.
Access — Remove the control compartment service panel.
Document — Photograph the primary (line) and secondary (24V) wiring before disconnecting.
Remove — Disconnect the leads, remove the transformer mounting screws, and lift out the failed unit.
Install — Mount the new transformer, then reconnect the 115V primary and 24V secondary leads exactly per your photo.
Test — Restore power, confirm 24V across the secondary, and verify the thermostat and control board power up and call for heat.

Signs You Need a Replacement

Furnace completely dead — no thermostat display or response
No measurable 24V on the secondary while 115V is present on the primary
Burnt smell or visibly scorched transformer windings
Repeated control-fuse blow after a low-voltage short

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 T8...

$27.95

Frequently Asked Questions

Does this Transformer fit my Tempstar T8MPT075F14A1 — 115V to 24V Control Transformer | Ships Today?

Yes. This is the factory-specified OEM transformer for the Tempstar T8MPT075F14A1 — 115V to 24V Control Transformer | 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 T8MPT075F14A1 — 115V to 24V Control Transformer | 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.

Menu