What are the specs for this Transformer?

The correct replacement for Tempstar model TCA948GKA200 – 208/230V 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 TCA948GKA200 – 208/230V 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 TCA948GKA200 – 208/230V to 24V | Ships Today

Name: Tempstar 40VA Transformer for TCA948GKA200 – 208/230V to 24V | Ships Today
Brand: Tempstar
SKU: 1170676-GEN
Price: 24.00 USD
Availability: InStock

SKU: 1170676-GEN Brand: Tempstar

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Overview

This genuine OEM control transformer (part number 1170676) supplies the 24V low-voltage power for the Tempstar TCA948GKA200. It steps 208/230V line voltage down to 24V at 40VA, energizing the contactor coil, pressure switches, and control circuit. The transformer is the foundation of the control system — when it fails, the contactor will not pull in, the unit appears completely dead, and no cooling occurs even with line voltage present. The 40VA rating gives ample headroom for the unit's control loads. Replacing a burned-out or shorted transformer with the exact OEM part restores correct control voltage and reliable operation.

Specifications

Spec	Value
Part Number	1170676
Type	Step-Down Control Transformer
Brand	Tempstar (ICP / Heil)
Primary Voltage	208/230V
Secondary Voltage	24V
Rating	40 VA
Fitment	OEM direct replacement

Compatibility

A direct factory replacement for the Tempstar TCA948GKA200. The 1170676 transformer is used across numerous ICP/Heil-built condensers and heat pumps under the Tempstar, Heil, Comfortmaker, and related brands using a 208/230V to 24V 40VA control supply. Verify your existing transformer's voltage and VA rating before ordering.

Installation Guide

Safety First – Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
Access – Remove the condenser service panel to reach the control box.
Document – Photograph all primary (line) and secondary (24V) lead connections before removal.
Remove – Disconnect the primary and secondary leads and unbolt the transformer from its mounting bracket.
Install – Mount the new 1170676 transformer, matching primary leads to 208/230V and secondary to the 24V circuit per your photo.
Test – Restore power and confirm 24V across the secondary and that the contactor energizes.

Signs You Need a Replacement

No 24V control voltage at the secondary terminals
Contactor will not pull in and the unit appears dead
Burnt smell, scorched windings, or melted housing
Repeated blown low-voltage fuse traced to a shorted transformer

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 TC...

$24.00

Frequently Asked Questions

Does this Transformer fit my Tempstar TCA948GKA200 – 208/230V to 24V | Ships Today?

Yes. This is the factory-specified OEM transformer for the Tempstar TCA948GKA200 – 208/230V 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 TCA948GKA200 – 208/230V 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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