What are the specs for this Transformer?

The correct replacement for Tempstar model TCH924GKA200 — OEM 1170676 | 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 TCH924GKA200 — OEM 1170676 | 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 208/230V to 24V for TCH924GKA200 — OEM 1170676 | Ships Today

Name: Tempstar 40VA Transformer 208/230V to 24V for TCH924GKA200 — OEM 1170676 | Ships Today
Brand: Tempstar
SKU: 1172574-GEN
Price: 34.00 USD
Availability: InStock

SKU: 1172574-GEN Brand: Tempstar

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Overview

This Tempstar 40VA control transformer (OEM part 1170676) steps the unit's 208/230V line voltage down to the 24V needed to power the thermostat, contactor coil, reversing-valve solenoid, and safety circuits. Rated at 40 volt-amps, it supplies adequate inrush current for the control loads on this heat pump chassis. A failed transformer produces a completely dead control circuit — no thermostat display, no contactor pull-in, and no call for cooling or heating. Failures are usually caused by a shorted low-voltage wire, a stuck contactor coil, or age-related winding breakdown.

Specifications

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

Compatibility

Direct OEM replacement for Tempstar model TCH924GKA200 and related ICP/Heil/Comfortmaker heat pump units. This listing also relates to companion control parts on the same model, including reversing valve coil (1172574) and reversing valve with coil assembly (1175621); order those separately if needed. Verify your VA rating and voltage taps before installing.

Installation Guide

Safety First — Disconnect power and verify zero voltage with a multimeter.
Access — Remove the unit service panel.
Document — Photograph the primary and secondary wiring before disconnecting.
Remove — Confirm the correct primary tap for your supply voltage, disconnect all leads, and unbolt the transformer from the control bracket.
Install — Mount the new transformer, land the primary on the matching voltage tap, and reconnect the 24V secondary per your photo.
Test — Restore power and confirm 24V at the secondary and proper contactor/thermostat operation.

Signs You Need a Replacement

Dead thermostat and no low-voltage anywhere in the system
No 24V reading across the secondary terminals
Burnt smell or visibly charred transformer windings
Repeated transformer failure pointing to a shorted control wire

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 208/23...

$34.00

Frequently Asked Questions

Does this Transformer fit my Tempstar TCH924GKA200 — OEM 1170676 | Ships Today?

Yes. This is the factory-specified OEM transformer for the Tempstar TCH924GKA200 — OEM 1170676 | 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 TCH924GKA200 — OEM 1170676 | 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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