ICP 24VAC Relay Transformer Component for SUP23M2301CIA — OEM L01H009 | Ships Today

Overview

The L01H009 is a genuine OEM 24VAC control relay (AG90-23242-024W) used in the low-voltage control circuit of the ICP / Tempstar / Heil SUP23M2301CIA. The relay uses a 24-volt coil to switch line-voltage loads such as the blower, inducer, or auxiliary components on a call from the thermostat or control board. When this relay fails, the system may not respond to thermostat calls, components may chatter, or a load may stay energized or refuse to start. Replacing it with the exact OEM part restores correct sequencing and protects the rest of the control circuit.

Specifications

Compatibility

Engineered for the ICP-family SUP23M2301CIA and shared across many ICP, Tempstar, Heil, and Comfortmaker air handlers and furnaces using the same 24VAC control platform. Verify your unit's parts list before ordering.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
2. Access — Remove the service / control panel to expose the low-voltage board.
3. Document — Photograph all relay wiring before disconnecting.
4. Remove — Label and pull the spade connectors, then unclip or unscrew the failed relay.
5. Install — Mount the new L01H009 and reconnect each wire exactly per your photo.
6. Test — Restore power and confirm the relay pulls in and switches its load on a thermostat call.

Signs You Need a Replacement

• System ignores thermostat calls or responds intermittently.
• Audible chatter or buzzing from the control area.
• Blower or component stays running or won't start.
• Burnt, pitted, or welded relay contacts.

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.