What are the specs for this Transformer?

The correct replacement for Tempstar model TEB09R34RTA — 277V 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 TEB09R34RTA — 277V 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 TEB09R34RTA — 277V to 24V | Ships Today

Name: Tempstar 40VA Transformer for TEB09R34RTA — 277V to 24V | Ships Today
Brand: Tempstar
SKU: 1053004-GEN
Price: 34.95 USD
Availability: InStock

SKU: 1053004-GEN Brand: Tempstar

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Overview

This is a genuine OEM 40VA control transformer for the Tempstar TEB09R34RTA, factory part number 1091226. It steps the unit's 277V line voltage down to the 24VAC needed by the control circuit — the thermostat, relays, and contactors that run the system. This kit also covers the matching 24V control relays used in this model (parts 1053004 and 1060940 DPST). When the transformer fails — typically from an overload, a shorted control wire, or age — the entire low-voltage side goes dead: no thermostat response, no relay action, and no heating or cooling, even though line power is present.

Specifications

Spec	Value
Transformer Part Number	1091226
Type	Control Transformer
Brand	Tempstar
Primary Voltage	277 VAC
Secondary Voltage	24 VAC
Rating	40 VA
Included Relays	1053004 (24V), 1060940 (24V DPST)
Fitment	OEM Genuine

Compatibility

Direct OEM replacement for the Tempstar TEB09R34RTA. The 1091226 277V-to-24V 40VA transformer is used throughout the ICP-family TEB09R34 PTAC series (Tempstar, Heil, Comfortmaker) on 277V applications. Confirm your line voltage is 277V and check the transformer's printed ratings before ordering.

Installation Guide

Safety First — Disconnect power at the unit and breaker; 277V is dangerous. Verify zero voltage with a multimeter.
Access — Remove the front grille and control-panel cover to reach the transformer and relays.
Document — Photograph the primary (277V) and secondary (24V) wiring before disconnecting.
Remove — Disconnect the leads and unbolt the old transformer from its mounting bracket.
Install — Mount the new 1091226 transformer, reconnect primary and secondary per your photo, and replace any failed relays.
Test — Restore power and confirm 24VAC on the secondary, then verify control operation.

Signs You Need a Replacement

No 24V control power — thermostat and relays completely dead
Unit will not start despite confirmed 277V line voltage
Burned smell, scorched housing, or melted secondary leads
Repeated control-fuse blow-outs or no 24VAC at the transformer secondary

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 TE...

$34.95

Frequently Asked Questions

Does this Transformer fit my Tempstar TEB09R34RTA — 277V to 24V | Ships Today?

Yes. This is the factory-specified OEM transformer for the Tempstar TEB09R34RTA — 277V 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 TEB09R34RTA — 277V 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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