What are the specs for this Transformer?

The correct replacement for Tempstar model T8MPV075F14A1 — 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 T8MPV075F14A1 — 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 T8MPV075F14A1 — 115V to 24V Control Transformer | Ships Today

Name: Tempstar 40VA Transformer for T8MPV075F14A1 — 115V to 24V Control Transformer | Ships Today
Brand: Tempstar
SKU: 1012722-GEN
Price: 29.95 USD
Availability: InStock

SKU: 1012722-GEN Brand: Tempstar

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Overview

This OEM 40VA control transformer (part number 1012722, "TRANS 115>24 40VA X") supplies the low-voltage control power for the Tempstar T8MPV075F14A1 gas furnace. It steps 115V line voltage down to 24V to run the thermostat, gas valve, control board relays, and other low-voltage components. Rated at 40VA, it provides the current needed to drive these loads simultaneously. When a transformer fails — usually from a shorted secondary, an overloaded control circuit, or simple age — the furnace loses all 24V control power: the thermostat goes dark and the system will not respond to a call for heat or cool.

Specifications

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

Compatibility

Direct-fit replacement for the Tempstar T8MPV075F14A1 furnace. This 115V-to-24V 40VA transformer is a common ICP service part used across many Tempstar, Heil, and Comfortmaker furnaces and air handlers. Confirm your primary voltage and VA rating before ordering.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker. Verify zero voltage with a multimeter.
Access — Remove the control/blower service panel to reach the transformer.
Document — Photograph all primary (line) and secondary (24V) wire connections before disconnecting.
Remove — Disconnect the leads, remove the mounting screws or bracket, and lift out the failed transformer.
Install — Mount the new transformer and reconnect the primary and secondary leads exactly per your photo, matching wire colors and terminals.
Test — Restore power and confirm 24V at the secondary and normal thermostat/furnace operation.

Signs You Need a Replacement

Thermostat screen is blank and the system is completely unresponsive.
No 24V measured across the transformer secondary.
Repeated blown low-voltage fuse on the control board.
Burnt smell or visible discoloration on the transformer housing.

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...

$29.95

Frequently Asked Questions

Does this Transformer fit my Tempstar T8MPV075F14A1 — 115V to 24V Control Transformer | Ships Today?

Yes. This is the factory-specified OEM transformer for the Tempstar T8MPV075F14A1 — 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 T8MPV075F14A1 — 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.

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