Standard Ignition RY-241 HVAC Automatic Temperature Control (ATC) Relay

HVAC ATC Relay for Select GM and Nissan Applications

Standard Ignition RY-241 is an HVAC automatic temperature control relay built for select 1985-1996 vehicles, including Buick, Cadillac, Chevrolet, GMC, Nissan, Oldsmobile, and Pontiac applications. It uses a 12-volt, 5-blade terminal design with a square female connector to support the relay function in the climate control system.

Key Features

• Part number: RY-241
• HVAC Automatic Temperature Control (ATC) relay
• 12 V electrical system application
• 20 amp amperage rating
• Female square connector with 1 connector cavity
• 5 male blade terminals
• Composite housing for harsh underhood temperatures
• Brass or copper contacts where specified for wear resistance
• Manufactured under TS16949 and ISO9001 certified processes

Detailed Description

This Standard Ignition relay is built for HVAC control circuits that rely on a stable switching signal to manage automatic temperature control operation. The composite housing is made to withstand severe underhood conditions, while specified brass or copper contacts support long-term electrical wear resistance. Standard Ignition maintains quality control from component selection through finished product production, and the part is manufactured to stringent quality requirements. This part cross-references Hella 007794307 for the same application. Compatible fitment includes 1991-1994 Nissan Sentra, 1987-1995 Nissan Pathfinder, and 1991-1993 Buick Roadmaster, along with additional Buick, Cadillac, Chevrolet, GMC, Oldsmobile, Pontiac, and Nissan models listed below. RY-241 is a direct-fit style relay for vehicles that use the specified connector and terminal layout.

What It Helps Fix

• HVAC relay failure causing inconsistent automatic temperature control operation
• Noisy, intermittent, or non-responsive climate control relay switching
• Electrical contact wear in the HVAC control circuit
• Heat-related relay housing damage in the engine compartment
• Fitment issues on vehicles requiring a 5-terminal square relay layout

Installation Notes and Fitment

• Fits 1994-1996 GMC P3500, N/A
• Fits 1995 Chevrolet P30, N/A
• Fits 1987-1995 Nissan Pathfinder, N/A
• Fits 1994 Nissan Pickup, N/A
• Fits 1991-1994 Nissan Sentra, N/A
• Fits 1991-1993 Buick Roadmaster, N/A, w/ AC; OE No. 12077874
• Fits 1992-1994 Cadillac DeVille, N/A, w/ Skirt
• Fits 1991-1993 Buick Park Avenue, N/A
• Fits 1991-1993 Cadillac Fleetwood, N/A
• Fits 1991-1993 Chevrolet Caprice, N/A, OE No. 12077874
• Fits 1991-1993 Nissan NX, N/A
• Fits 1992-1993 Oldsmobile 88, N/A, w/o Bracket; w/ Skirt
• Fits 1988-1993 Oldsmobile 98, N/A
• Fits 1993 Pontiac Bonneville, N/A, w/ Skirt
• Fits 1993 Pontiac Firebird, N/A, w/ Skirt
• Fits 1988-1993 Cadillac Commercial Chassis, N/A
• Fits 1989-1993 Cadillac Allante, N/A
• Fits 1988-1999 Buick LeSabre, N/A, with notes varying by year and equipment

Verify connector shape, terminal count, and any bracket or skirt notes against the original relay before installation. Some listed applications require specific equipment combinations such as manual AC, shroud, or no-bracket configurations.

Quality Assurance

Standard Ignition manufactures this relay under controlled processes with TS16949 and ISO9001 certified plants. The brand’s OE-focused manufacturing approach helps ensure the right part is produced for the specified vehicle application.