Four Seasons 84549 HVAC Heater Control Valve

Reliable Heater Fitting for GMC and Oldsmobile Vehicles

The Four Seasons Heater Fitting 84549 is designed to provide a durable and precise connection within your vehicle's heating system. Engineered from steel, this HVAC heater control valve fitting ensures consistent performance for GMC and Oldsmobile models, including the Cutlass Supreme and Safari.

• Constructed from robust steel material for long-lasting durability
• Straight fitting style with 5/8" hose to 3/4" NPT connection featuring a restrictor
• Exact dimensions: 1.000 inch (25.4 mm) inlet diameter and 0.625 to 0.75 inch fitting sizes
• Overall depth of 1.750 inches (44.45 mm) for precise fitment
• Compatible with GMC and Oldsmobile Cutlass Supreme and Safari models

Four Seasons Heater Fitting Product Line Overview

The Heater Fitting line by Four Seasons focuses on providing reliable HVAC temperature control components designed to meet OEM specifications. This product line emphasizes quality materials and precise engineering to maintain optimal heater system performance. The 84549 heater fitting is part of this line, offering a steel construction and a straight fitting style that supports efficient coolant flow and system integrity.

Detailed Product Description and Specifications

The Four Seasons 84549 heater fitting is a steel HVAC heater control valve designed for specific vehicle applications. It features a straight fitting style with a 5/8" hose to 3/4" NPT connection, including a restrictor to regulate flow. The fitting has an inlet diameter of 1.000 inch (25.4 mm) and fitting sizes of 0.625 inch and 0.75 inch on each end, ensuring compatibility with designated heater hoses. The overall depth measures 1.750 inches (44.45 mm), with precise inlet and outlet lengths to facilitate proper installation and function within the heating system.

Common Applications and Issues Addressed

• Replacement of worn or corroded heater fittings in GMC Cutlass Supreme and Oldsmobile Safari
• Resolving coolant leaks caused by damaged or faulty heater control valve fittings
• Restoring proper heater core flow and temperature regulation
• Maintaining HVAC system integrity to prevent overheating or insufficient cabin heat
• Ensuring secure connections between heater hoses and control valves

Installation Notes and Tips

When installing the Four Seasons 84549 heater fitting, ensure the correct orientation of the straight fitting to match the vehicle’s heater hose routing. Verify that the 5/8" hose and 3/4" NPT threads are clean and free of debris before assembly. Use appropriate tools to avoid damaging the steel fitting or threads. Confirm all connections are tight to prevent coolant leaks but avoid over-tightening which may cause thread damage.

Quality Assurance and Warranty

Four Seasons manufactures the 84549 heater fitting to meet or exceed OEM standards, using durable steel materials for reliable performance. While specific warranty details are not provided, Four Seasons products typically undergo rigorous quality control to ensure fitment accuracy and long-term durability in HVAC temperature control applications.