ICP 40VA Transformer for WJH360000KTP0A2 — 208/230V to 24V, OEM 1173691 | Ships Today
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Overview
This is the genuine OEM control transformer (part number 1173691) for the ICP / Tempstar / Heil WJH360000KTP0A2 heat pump. It steps 208/230V line voltage down to 24V at 40VA, supplying the low-voltage control circuit that powers the thermostat, contactor coil, reversing valve solenoid, and defrost board. When a transformer fails the entire control circuit goes dead — the system will not respond to the thermostat, the contactor will not pull in, and neither heating nor cooling will start. Common failure signs include no 24V at the control terminals, a tripped or blown low-voltage fuse, a buzzing or scorched transformer, or intermittent loss of control power. This listing also covers the related 24V control components for this model — barrier 1176032, reversing valve coil 1172619, and reversing valve with coil 1172618.
Specifications
| Spec | Value |
|---|---|
| Primary Part Number | 1173691 |
| Type | Step-Down Control Transformer |
| Brand | ICP / Tempstar / Heil |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Rating | 40VA |
| Related OEM Parts | 1176032, 1172619, 1172618 |
| Fit | OEM Direct Replacement |
Compatibility
Direct-fit OEM replacement for the ICP / Tempstar / Heil model WJH360000KTP0A2 and related Comfortmaker-family heat pumps using the 1173691 40VA control transformer. Confirm the primary voltage tap and part number on your existing transformer before ordering.
Installation Guide
- Safety First — Disconnect line power and verify zero voltage at the transformer primary with a multimeter before working.
- Access — Remove the control box cover to expose the transformer and low-voltage terminal block.
- Document — Photograph the primary and secondary leads and their terminal positions before disconnecting.
- Remove — Disconnect the primary and secondary wires, then unbolt the transformer from its mounting bracket.
- Install — Mount the new transformer, connect the correct primary voltage tap for your supply, and reconnect the 24V secondary leads per your photos.
- Test — Restore power and verify 24V across the secondary terminals and proper control response from the thermostat.
Signs You Need a Replacement
- No 24V at the control board or thermostat terminals.
- Repeatedly blown low-voltage control fuse.
- Transformer buzzes, overheats, or shows scorch marks.
- System ignores the thermostat with line voltage present.
Shipping & Returns
Ships same day on orders placed before 3 PM CST. 30-day returns on unused parts. 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