What are the specs for this Transformer?

The correct replacement for Tempstar model TCH624GKA100 — 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 TCH624GKA100 — 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 TCH624GKA100 — 208/230V to 24V | Ships Today

Name: Tempstar 40VA Transformer for TCH624GKA100 — 208/230V to 24V | Ships Today
Brand: Tempstar
SKU: 1172574-GEN
Price: 22.95 USD
Availability: InStock

SKU: 1172574-GEN Brand: Tempstar

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Overview

This OEM control transformer (part number 1170676) supplies the 24-volt control power for the Tempstar TCH624GKA100 heat pump. It steps the 208/230V line voltage down to a 24V secondary rated at 40VA, powering the contactor coil, reversing-valve coil, pressure switches, and the indoor control circuit. When a transformer fails — usually from a shorted control wire, a stuck contactor, or age — the entire low-voltage system goes dead: no thermostat response, no contactor pull-in, and no call for cooling or heat-pump operation. A fresh 40VA OEM transformer restores stable 24V control power and proper system sequencing. (Related reversing-valve coil components 1172574 and 1175621 appear on this model for reference.)

Specifications

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

Compatibility

Built for the Tempstar TCH624GKA100 condensing unit and compatible with ICP-family outdoor units (Heil, Comfortmaker, Tempstar) that use a 208/230V-to-24V 40VA control transformer. Confirm your existing transformer's primary tap and VA rating before installing.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter.
Access — Remove the condenser control-panel service cover.
Document — Photograph the primary and secondary wiring before disconnecting.
Remove — Disconnect the line-voltage primary leads and 24V secondary leads, then unbolt the transformer from the panel.
Install — Mount the new transformer, land the primary leads on the correct 208 or 230V tap, and reconnect the 24V secondary per your photo.
Test — Restore power and verify 24V across the secondary and proper contactor/reversing-valve operation.

Signs You Need a Replacement

No 24V control power — thermostat and contactor are completely dead.
Burnt smell or visibly scorched/melted transformer housing.
Repeated blown low-voltage fuses traced to a failed transformer.
Secondary reads 0V (or far below 24V) under load.

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...

$22.95

Frequently Asked Questions

Does this Transformer fit my Tempstar TCH624GKA100 — 208/230V to 24V | Ships Today?

Yes. This is the factory-specified OEM transformer for the Tempstar TCH624GKA100 — 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 TCH624GKA100 — 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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