What are the specs for this Transformer?

The correct replacement for Tempstar model TEB15K25RTA — 208/240V to 24V with Relays | 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 TEB15K25RTA — 208/240V to 24V with Relays | 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 TEB15K25RTA — 208/240V to 24V with Relays | Ships Today

Name: Tempstar 40VA Transformer for TEB15K25RTA — 208/240V to 24V with Relays | Ships Today
Brand: Tempstar
SKU: 1053004-GEN
Price: 34.00 USD
Availability: InStock

SKU: 1053004-GEN Brand: Tempstar

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

Overview

This is a genuine OEM control package for the Tempstar TEB15K25RTA, built around a 40VA step-down transformer (part 1056899) that converts 208/240V line voltage to the 24V needed by the control circuit, plus two 24V control relays — a SPST relay (1053004) and a DPST relay (1060940). The transformer powers the thermostat and control board; if it fails, the entire low-voltage circuit goes dead and the unit will not respond to any call for heat or cool. The relays handle switching of the unit's loads. A blown transformer commonly results from a control-circuit short or sustained overload.

Specifications

Spec	Value
OEM Part Numbers	1056899 (Transformer), 1053004 (Relay SPST), 1060940 (Relay DPST)
Type	Step-Down Transformer with Control Relays
Brand	Tempstar (Heil / ICP)
Rating	40VA
Primary Voltage	208/240V
Secondary Voltage	24V
Fit	OEM Direct Replacement

Compatibility

Engineered for the Tempstar / Heil / ICP TEB15K25RTA and units using the same 40VA control transformer and relays. Confirm the OEM part numbers above against your existing components before ordering.

Installation Guide

Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
Access — Remove the service panel to reach the control compartment.
Document — Photograph the transformer and relay wiring before disconnecting.
Remove — Disconnect the primary and secondary leads, unbolt the transformer, and unclip the relays from their mounts.
Install — Mount the new transformer and relays, then reconnect every lead per your photo, matching primary to line voltage and secondary to the 24V circuit.
Test — Restore power and confirm 24V at the secondary and correct relay operation.

Signs You Need a Replacement

No 24V control power and a completely unresponsive unit
Repeatedly blown low-voltage fuse
Buzzing, overheated, or burnt-smelling transformer
Relays that chatter, stick, or fail to switch

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...

$34.00

Frequently Asked Questions

Does this Transformer fit my Tempstar TEB15K25RTA — 208/240V to 24V with Relays | Ships Today?

Yes. This is the factory-specified OEM transformer for the Tempstar TEB15K25RTA — 208/240V to 24V with Relays | 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 TEB15K25RTA — 208/240V to 24V with Relays | 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