ICP 40VA 120V to 25V Transformer with Relay Receptacle for WUGF105AH01 — OEM 97298 | Ships Today
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Overview
This genuine OEM control assembly for the ICP/Tempstar/Heil WUGF105AH01 furnace pairs a 40VA step-down transformer with integrated relay receptacle (part number 97298, 120V primary to 25V secondary) and a 24V SPDT control relay (part number 92840). The transformer powers the furnace's low-voltage control circuit — thermostat, gas valve, igniter sequence, and control board — while the SPDT relay switches a control circuit such as the blower. When the transformer fails the furnace goes completely unresponsive with no thermostat power; when the relay fails the controlled circuit (often the blower) stops switching reliably. Because both parts share the WUGF105AH01 control circuit, replacing them together restores full low-voltage control operation.
Specifications
| Spec | Value |
|---|---|
| Transformer Part Number | 97298 |
| Relay Part Number | 92840 |
| Type | Step-Down Transformer w/ Relay Receptacle + SPDT Relay |
| Brand | ICP / Tempstar / Heil |
| Primary Voltage | 120V |
| Secondary Voltage | 25V |
| Rating | 40VA |
| Relay | 24V SPDT |
| Fits Model | WUGF105AH01 |
Compatibility
Factory replacement transformer-and-relay control parts for the ICP/Tempstar/Heil WUGF105AH01 furnace. The 120V-to-25V, 40VA transformer with relay receptacle and the 24V SPDT relay are common across ICP-family furnaces — verify voltage ratings and terminal layout against your originals before installing.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker and verify zero voltage with a multimeter.
- Access — Remove the furnace control compartment service panel.
- Document — Photograph all transformer primary/secondary leads and the relay terminal wiring before disconnecting.
- Remove — Disconnect and label the leads, then unbolt the transformer and unclip the relay from the receptacle.
- Install — Mount the new transformer, seat the relay in its receptacle, and reconnect every lead exactly per your photos.
- Test — Restore power, verify 25V across the secondary, confirm the relay clicks on demand, and check normal furnace operation.
Signs You Need a Replacement
- Furnace completely unresponsive with no thermostat power
- Repeatedly blown low-voltage control fuse
- Blower or controlled circuit fails to switch on demand
- Buzzing transformer or chattering/pitted relay contacts
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