What are the specs for this Transformer?

The correct replacement for ICP model WUGB105AG01 — 120V to 24V OEM | 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 ICP equipment which lists the model number WUGB105AG01 — 120V to 24V OEM | Ships Today.

ICP

ICP 40VA Transformer & 24V Relay for WUGB105AG01 — 120V to 24V OEM | Ships Today

Name: ICP 40VA Transformer & 24V Relay for WUGB105AG01 — 120V to 24V OEM | Ships Today
Brand: ICP
SKU: WUGB105AG01-GEN
Price: 38.95 USD
Availability: InStock

SKU: WUGB105AG01-GEN Brand: ICP

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Overview

This OEM control-power kit for the WUGB105AG01 gas furnace includes the 40VA step-down transformer (OEM #97298, TRANS RELAY RECEP 120>24 40VA) and the matching 24V SPDT relay (OEM #92840, RELAY 24V SPDT S). The transformer converts incoming 120V line voltage down to the 24V used by the thermostat, control board, gas valve, and safety circuits, while the relay switches blower or accessory loads on the low-voltage signal. A failed transformer leaves the furnace completely dead — no thermostat response, no ignition sequence — while a failed relay causes intermittent blower operation or chattering. Both parts are built to OEM specification for the ICP/Heil/Tempstar furnace platform.

Specifications

Spec	Value
Transformer Part Number	97298
Relay Part Number	92840
Transformer Rating	40 VA
Primary Voltage	120V
Secondary Voltage	24V
Relay Type	24V SPDT
Brand	ICP (Heil / Tempstar)
Fits Model	WUGB105AG01

Compatibility

Direct OEM fit for the ICP/Heil/Tempstar WUGB105AG01 gas furnace and compatible ICP-family models (Comfortmaker, Arcoaire, KeepRite) using the 40VA 120-to-24V transformer and SPDT relay. Verify part numbers 97298 and 92840 against your existing components before ordering.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker, and verify zero voltage with a multimeter on both primary and secondary leads.
Access — Remove the furnace control-compartment service panel.
Document — Photograph all wire connections on the transformer and relay before disconnecting.
Remove — Label and disconnect the primary (120V) and secondary (24V) leads, then unscrew the transformer and relay from the cabinet.
Install — Mount the new transformer and relay, then reconnect each wire exactly per your photo, observing primary vs. secondary terminals.
Test — Restore power, measure ~24V across the secondary, and run a heat cycle to confirm normal operation.

Signs You Need a Replacement

Furnace is completely unresponsive — no thermostat or ignition activity
No 24V reading at the control board or gas valve
Blown low-voltage fuse that fails again immediately
Chattering, buzzing, or intermittent relay/blower operation

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

ICP 40VA Transformer & 24V Relay...

$38.95

Frequently Asked Questions

Does this Transformer fit my ICP WUGB105AG01 — 120V to 24V OEM | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WUGB105AG01 — 120V to 24V OEM | 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 ICP WUGB105AG01 — 120V to 24V OEM | 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 ICP 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 ICP 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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