Standard Ignition RY-429 HVAC Temperature Delay Relay

HVAC Temperature Delay Relay for Chrysler and Dodge

Standard Ignition RY-429 is an HVAC temperature delay relay built for 12-volt systems that need reliable relay control in demanding underhood conditions. It uses a rectangular connector, 5 male blade terminals, and a 25-amp amperage rating for direct replacement service on a wide range of Chrysler, Dodge, Jeep, Ram, and Plymouth applications.

Fits 2005-2023 Chrysler 300, N/A; Fits 2006-2023 Dodge Charger, N/A; Fits 2007-2023 Jeep Wrangler, N/A. The RY-429 is also used across many other Chrysler, Dodge, Jeep, Ram, and Plymouth models, including select fan, lighting, and relay-controlled circuits.

Key Features

• HVAC temperature delay relay for 12-volt vehicle electrical systems
• 25-amp amperage rating for relay-controlled circuits
• Rectangular connector with 5 male blade terminals
• Composite housing helps protect against heat and harsh underhood exposure
• Brass or copper contacts are used where specified for wear resistance
• Manufactured under TS16949 and ISO9001 certified quality systems

Detailed Description

Standard Ignition RY-429 is engineered as a replacement HVAC temperature delay relay for vehicles that rely on timed relay operation to manage electrical loads. The relay construction uses durable composite materials and controlled manufacturing processes to help maintain consistent performance in demanding automotive environments. As an OE-focused manufacturer, Standard Ignition applies component-level quality control from raw materials through finished product inspection. This part cross-references Eastern Catalytic 20356 for the same application.

Common search terms for this part include HVAC temperature delay relay for Chrysler 300, Dodge Charger relay replacement, and Jeep Wrangler 12-volt relay with 5 blade terminals. The RY-429 part number is also referenced in applications for Dodge Challenger, Ram 1500, and Chrysler Town & Country platforms.

What It Helps Solve

• Intermittent HVAC relay operation
• Delayed or inconsistent electrical switching in relay-controlled circuits
• Heat-related relay failure in underhood locations
• Connector mismatch when replacing a 5-terminal blade relay
• Electrical load control issues in supported Chrysler, Dodge, Jeep, Ram, and Plymouth vehicles

Installation Notes and Tips

• Verify the connector shape, terminal count, and terminal type before installation.
• Confirm the vehicle’s relay stamping number or OE reference when available.
• Check the circuit function and application notes, especially on models with special equipment such as HID headlights, tow packages, or fan-speed-specific relays.
• Inspect the relay socket for heat damage, corrosion, or loose terminals before installing the new relay.

Quality Assurance

Standard Ignition manufactures this relay under stringent quality requirements in TS16949 and ISO9001 certified facilities. The brand’s OE manufacturing background supports consistent fit and electrical performance across the listed applications.