Standard Ignition RY-464 HVAC Temperature Delay Relay

HVAC Temperature Delay Relay for Ford and Mercury

Standard Ignition RY-464 is an HVAC temperature delay relay built for 12-volt systems and 20-amp operation. It uses a rectangular connector with 4 male blade terminals and is made for vehicles that need reliable relay control in the heating and air conditioning circuit.

Compatible With 1995-2000 Ford Contour and 1995-2000 Mercury Mystique, plus 1995-1997 and 1999 Mercury Cougar applications. This part number, RY-464, is also a direct reference point for shoppers comparing HVAC relay replacements by OE-style fitment.

Key Features

• HVAC temperature delay relay for climate control circuit operation
• 12-volt electrical system rating
• 20 amp amperage rating
• Rectangular connector shape with 4 male blade terminals
• Relay-only contents
• No mounting bracket included
• Continuous duty: No

Detailed Description

Standard Ignition RY-464 is engineered as an HVAC relay replacement for vehicles that rely on timed or delayed temperature control functions. The composite housing is built to handle harsh underhood temperatures, while brass or copper contacts are used where specified to support wear resistance and stable electrical performance. Standard Ignition manufactures this relay under stringent quality requirements in TS16949 and ISO9001 certified facilities, with process control from component selection through final production. If you are sourcing an HVAC temperature delay relay for a Ford Contour, Mercury Mystique, or Mercury Cougar, RY-464 provides a direct-fit replacement path for the original relay application.

This part cross-references Four Seasons 36138 for the same application.

Common Problems This Relay Can Address

• HVAC blower or temperature delay circuit not responding correctly
• Intermittent relay operation in the climate control system
• Electrical contact wear causing inconsistent HVAC function
• Relay failure from heat exposure in the engine compartment
• Need for an OE-style replacement relay with the correct terminal layout

Installation Notes and Tips

Verify the connector shape, terminal count, and blade terminal style before installation. Confirm the vehicle uses a 12-volt HVAC relay circuit and compare the original relay location and terminal layout to Standard Ignition RY-464. For best results, inspect the connector for heat damage, corrosion, or loose terminals before installing the new relay.

Quality Assurance

Standard Ignition builds this relay with composite housing protection and controlled manufacturing processes to support consistent fit and electrical performance. TS16949 and ISO9001 certified production helps ensure the part is made to the required specifications for the listed Ford and Mercury applications.