Standard Ignition RY-123 HVAC Temperature Delay Relay

HVAC Temperature Delay Relay for Toyota and Lexus

Standard Ignition RY-123 is a 12-volt HVAC temperature delay relay built with a female round connector, male blade terminals, and a 3-terminal layout. It is used in select Toyota, Lexus, and Chevrolet applications where the HVAC control circuit requires a relay-style delay function.

Key Features

• 12 V relay for HVAC temperature delay applications
• Female round connector with 1 connector interface
• 3 male blade terminals for circuit connection
• No mounting bracket included
• Direct-fit style replacement for select import and domestic vehicles

Detailed Description

The Standard Ignition RY-123 is an HVAC temperature delay relay intended for vehicles that use a relay-based control strategy in the climate system. It is listed for a wide range of Toyota models, including Land Cruiser, Previa, T100, MR2, Pickup, 4Runner, Tercel, Van, Corolla, Camry, Celica, Cressida, Starlet, and Corona, as well as 1996-1997 Lexus LX450 and 1985-1988 Chevrolet Nova. This part number, RY-123, also cross-references Rostra Powertrain Controls 60-0111 for the same application.

Use RY-123 when servicing HVAC circuits that rely on a temperature delay relay to manage timing and electrical switching. The connector and terminal style are important for proper electrical engagement, so match the round female connector and 3-blade terminal layout before installation.

What It Helps Fix

• HVAC relay failure causing intermittent climate control operation
• Delayed or inconsistent blower or temperature circuit response
• Electrical switching issues in the HVAC control path
• Connector mismatch during relay replacement
• Restoration of relay function in select Toyota, Lexus, and Chevrolet vehicles

Installation Notes and Tips

• Verify the vehicle uses a 12 V relay with a round female connector and 3 male blade terminals.
• Confirm the original part number and connector shape before replacement.
• Inspect the harness terminals for corrosion, heat damage, or looseness before installing the new relay.
• Check the HVAC circuit operation after installation to confirm proper relay engagement.

Quality Assurance

Standard Ignition is a recognized aftermarket brand for electrical and ignition service parts. RY-123 is built to match the specified relay configuration for the listed applications and interchange references.